Re: updating or deleting a component from a collection through display tag

[Greg Lindholm <gr...@gmail.com>]

>
>
> I have successfully used the display tag to iterate over a collection
> which is exposed in an action class. On each row in addition to the
> columns displaying the fields of each object in the collection, I
> embed two more struts-tag urls: Update and Remove.
>
> The objective is to have an extra two columns for every row in the
> table giving the ability to update or delete each record:
>
> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>        <display:column property="entry" />
>        <display:column property="date" sortable="true"
> defaultorder="ascending" title="TimeStamp"/>
>        <display:column><a href="<s:url action='UpdateEntryForm'>
>                                <s:param name="name"
> value="%{goalToAchieve.owner.fullName}" />
>                        </s:url>
>                        ">Edit</a></display:column>
>        <display:column><a href="<s:url action='DeleteEntryForm'>
>                                        <s:param name="name"
> value="%{goalToAchieve.owner.fullName}" />
>                                        <s:property value="%{entry}"/>
>                                       </s:url>
>                                       ">Remove</a></display:column>
> </display:table>
>
> I am having trouble passing the entry property, (or reference to it)
> to the url targeting the update or delete action. The entries
> collection consists of value type, embeddable objects. I am aware of
> how to pass parameters to the linking url, but my issue is passing a
> reference to the "entry" property of each row, to the update or delete
> action for the same row.
>
>
You didn't say what 'entry' is, but if it is a String or some primitive you
can just pass it as another parameter.

<s:url action='DeleteEntryForm'>
          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
           <s:param name="entry" value="%{entry}" />
</s:url>

Usually, every database entity object has an 'id' property (primary key) and
you would just pass the id as a parameter so your action can find the object
in the database.

In you browser do a view source on the page to ensure the url is being
generated correctly with the params you are expecting.

Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Hey, this worked! Thanks Musachy, the tip you provided solved the
problem I was facing for the last 3 days.

I really appreciate your time to post this information. It looks like
the display tag packs much more functionality than it seems.

On Mon, Jul 13, 2009 at 2:03 PM, Musachy Barroso<mu...@gmail.com> wrote:
> The current row used by displaytag is pushed under the name set in
> uid, so you could do this:
>
> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
> <display:column>
> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
> <s:param name="date" value="#attr.thisGoal.mark" />
>  </s:url>
> ">Remove</a>
> </display:column>
>
> musachy
>
> On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
> Christodoulakis<di...@gmail.com> wrote:
>> Thanks. So, if I wanted to access a particular property (say this
>> property is called mark) of an "entry" object which I am iterating
>> over, I would do something like the following:
>>
>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>> <display:column property="entry" />
>> <display:column property="date" sortable="true"
>> defaultorder="ascending" title="TimeStamp"/>
>> <display:column property="mark" />
>> <display:column>
>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> <s:param name="id" value="%{goalToAchieve.id}" />
>> <s:param name="date" value="#attr.entry.mark" />
>>   </s:url>
>> ">Remove</a>
>> </display:column>
>>
>> So, I could pass mark as a url param via s:url within the display tag?
>>
>> Thanks for the information!
>>
>> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
>>> Assuming that each entry is named "entry" by displayTag, you can
>>> access it using "#attr.entry" (or "#attr['entry']")  to access it from
>>> the S2 tags.
>>>
>>> musachy
>>>
>>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>>> Christodoulakis<di...@gmail.com> wrote:
>>>> Yes, that is exactly the case, hmm.. Although, how is the
>>>> display:table tag finds the collection in the first place?
>>>>
>>>> Supposedly the display has some way of reaching the valuestack, it can
>>>> even resolve the deeper notation <display:table
>>>> name="goalToAchieve.entries"
>>>>
>>>> However, I will switch back to s:iterator to test if the syntax
>>>> suggested will work. I mainly used the display tag as a quick way to
>>>> sort the collection, but if I can't access the properties of the
>>>> objects I am iterating over, it isn't of much use in this case
>>>>
>>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>>>> entries, you are using <display:table>.
>>>>>
>>>>> The syntax suggested will not work since <display:table> does not know
>>>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>>>> uses the value stack to resolve 'mark' which will not work here, you will
>>>>> need to replace %{mark} with the right syntax to work with <display:table>
>>>>> iterator.
>>>>>
>>>>> And I don't know anything about <display:table> so you will need to look up
>>>>> how to access the properties of the entities you are iterating over so as to
>>>>> build the URL.
>>>>>
>>>>>
>>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>>> dimi.chr@gmail.com> wrote:
>>>>>
>>>>>> I made the changes, but the view source indicates that the param
>>>>>> "mark" is not passed.
>>>>>>
>>>>>> The url linked is formed like this:
>>>>>>
>>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>>
>>>>>> The name and id params are fields of the parent object, the one
>>>>>> containing the collection.
>>>>>>
>>>>>> Actually, I tried with all fields taken from the collection object,
>>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>>> able to point to a field within a collection object too?
>>>>>>
>>>>>> It looks like individual collection object properties can be viewed
>>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>>> parameters for any other uses... unless I am missing something, or
>>>>>> doing something wrong.
>>>>>>
>>>>>>
>>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>>>> wrote:
>>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>>>> > the name and id of the parent object.
>>>>>> >
>>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>> >       <s:param name="mark" value="%{mark}" />
>>>>>> >   </s:url>
>>>>>> > ">Remove</a>
>>>>>> >
>>>>>> >
>>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>>> > dimi.chr@gmail.com> wrote:
>>>>>> >
>>>>>> >> Thanks for letting me know. Alright, so:
>>>>>> >>
>>>>>> >> This is the parent class:
>>>>>> >>
>>>>>> >> @Entity
>>>>>> >> public class GoalToAchieve {
>>>>>> >> @Id @GeneratedValue
>>>>>> >> private Long id;
>>>>>> >>
>>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>>> >>
>>>>>> >>        public Set<JournalEntry> getEntries() {
>>>>>> >>                return entries;
>>>>>> >>        }
>>>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>>>> >>                this.entries = entries;
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        public void addEntry(JournalEntry newEntry){
>>>>>> >>                entries.add(newEntry);
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        public void deleteEntry(JournalEntry entry){
>>>>>> >>                entries.remove(entry);
>>>>>> >>        }
>>>>>> >> ..plus some other standard fields with getters and setters
>>>>>> >>
>>>>>> >> This is the child-class:
>>>>>> >>
>>>>>> >> @Embeddable
>>>>>> >> public class JournalEntry {
>>>>>> >> @org.hibernate.annotations.Parent
>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>> >>
>>>>>> >> @Column
>>>>>> >> private Long mark;
>>>>>> >> public Long getMark() {
>>>>>> >>        return mark;
>>>>>> >> }
>>>>>> >> public void setMark(long mark){
>>>>>> >>        this.mark = mark;
>>>>>> >>         }
>>>>>> >>
>>>>>> >> @Column(length = 255, nullable = false)
>>>>>> >> private String entry;
>>>>>> >>
>>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>>> >> @Column(nullable = false, updatable = false)
>>>>>> >> private Date insertDate = new Date();
>>>>>> >>
>>>>>> >> ..plus the rest getters and setters
>>>>>> >>
>>>>>> >> And this this the jsp part where I display the collection:
>>>>>> >>
>>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>>> uid="thisGoal">
>>>>>> >>        <display:column property="entry" />
>>>>>> >>        <display:column property="date" sortable="true"
>>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>>> >>        <display:column property="mark" />
>>>>>> >>  <display:column>
>>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >>        <s:param name="mark" value="#mark" />
>>>>>> >>    </s:url>
>>>>>> >>    ">Edit</a>
>>>>>> >> </display:column>
>>>>>> >> <display:column>
>>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>> >>        <s:param name="mark" value="entry.mark" />
>>>>>> >>        <s:property value="%{entry}"/>
>>>>>> >>    </s:url>
>>>>>> >> ">Remove</a>
>>>>>> >> </display:column>
>>>>>> >> </display:table>
>>>>>> >> </s:if>
>>>>>> >>
>>>>>> >> ..and the delete action, which should take an entry reference and
>>>>>> >> remove it from the collections looks like this:
>>>>>> >>
>>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>>> >> public String execute(){
>>>>>> >>                goalToAchieve.deleteEntry(entry);
>>>>>> >>
>>>>>> >>                return SUCCESS;
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        private JournalEntry entry;
>>>>>> >>        private GoalToAchieve goalToAchieve;
>>>>>> >>        private long id;
>>>>>> >>
>>>>>> >> ... + getters and setters
>>>>>> >>
>>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>>> >> would do a lookup within the action to find the entry object and
>>>>>> >> remove it from the parent object collection, by calling
>>>>>> >> deleteEntry(JournalEntry entry)
>>>>>> >>
>>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>>>> >> wrote:
>>>>>> >> > You are not providing enough information for anyone to help you. Since
>>>>>> >> you
>>>>>> >> > have changed your object and the jsp you had better include them with
>>>>>> any
>>>>>> >> > request.
>>>>>> >> >
>>>>>> >> >
>>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>>> >> > dimi.chr@gmail.com> wrote:
>>>>>> >> >
>>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>>>> >> >> field based
>>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>>> >> >> parameter.
>>>>>> >> >>
>>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>>> >> >>
>>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>>> >> >> </s:url>
>>>>>> >> >>  ">Edit</a>
>>>>>> >> >>
>>>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>>>> >> >> the url string. I think this is because the only object available on
>>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>>>> >> >> each entry object. In other words, the display or iterator help me
>>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>>> >> >> something wrong.
>>>>>> >> >>
>>>>>> >> >
>>>>>> >>
>>>>>> >> ---------------------------------------------------------------------
>>>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>>>> >>
>>>>>> >>
>>>>>> >
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>
>>>>>>
>>>>>
>>>>
>>>> ---------------------------------------------------------------------
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>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
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>>
>>
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
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Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Great, many thanks again for the information. I bet others will find
it pretty handy too!

On Mon, Jul 13, 2009 at 9:23 PM, Musachy Barroso<mu...@gmail.com> wrote:
> you can sue that notation anywhere. A tip that will save you a lot of
> time, always wrap the OGNl expressions with %{}, that's why the first
> hidden is not getting evaluated. The second one has an empty value
> because "goalToAchieve" is probably not pointing to anything.
>
> btw what #attr does is search for a value in all scopes (page,
> request, session , application)
>
> musahcy
>
> On Mon, Jul 13, 2009 at 5:57 PM, Dimitrios
> Christodoulakis<di...@gmail.com> wrote:
>> Thanks again for helping out Musachy,
>> I was wondering if there are any rules regarding when the notation you
>> suggested below can be used. it works perfectly for setting url
>> params.
>>
>> I was trying to use it (with struts2 tags) within a form (which is
>> within the display:column tag) to pass the value to an action:
>>
>> <display:column>
>>        <s:form action="UpdateEntryForm">
>>        <s:hidden name="mark" value="#attr.thisEntry.mark" />
>>        <s:hiddenname="name" value="%{goalToAchieve.name}" />
>>        <s:submit value="Edit"/>
>>        </s:form>
>> </display:column>
>>
>> This creates an "Edit" button in each row for every object I iterate
>> over, and I hoped to use the s:hidden tag to populate the underlying
>> UpdateEntryForm action. I also try to test it by printing from the
>> execute method as listed below, but the console output is just the
>> literal for the mark and zero for the primitive:
>>
>> This id is: 0
>> This name is: #attr.thisEntry.mark
>>
>> My action class:
>>
>> public class UpdateEntryForm extends ActionSupport{
>> public String execute(){
>>                System.out.println("This id is: "+ getId());
>>                System.out.println("This name is: "+ getMark());
>>                return SUCCESS;
>>        }
>> private String name;
>> private long mark;
>> public String getName() {
>>                return name;
>>        }
>>        public void setName(String name){
>>                this.name = name;
>>        }
>>
>>        public String getMark() {
>>                return mark;
>>        }
>>        public void setMark(String mark){
>>                this.mark = mark;
>>        }
>> }
>>
>> Is there something wrong with the code above? Thanks again!
>>
>> On Mon, Jul 13, 2009 at 2:03 PM, Musachy Barroso<mu...@gmail.com> wrote:
>>> The current row used by displaytag is pushed under the name set in
>>> uid, so you could do this:
>>>
>>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>> <display:column>
>>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>>> <s:param name="date" value="#attr.thisGoal.mark" />
>>>  </s:url>
>>> ">Remove</a>
>>> </display:column>
>>>
>>> musachy
>>>
>>> On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
>>> Christodoulakis<di...@gmail.com> wrote:
>>>> Thanks. So, if I wanted to access a particular property (say this
>>>> property is called mark) of an "entry" object which I am iterating
>>>> over, I would do something like the following:
>>>>
>>>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>>> <display:column property="entry" />
>>>> <display:column property="date" sortable="true"
>>>> defaultorder="ascending" title="TimeStamp"/>
>>>> <display:column property="mark" />
>>>> <display:column>
>>>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>>>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>> <s:param name="id" value="%{goalToAchieve.id}" />
>>>> <s:param name="date" value="#attr.entry.mark" />
>>>>   </s:url>
>>>> ">Remove</a>
>>>> </display:column>
>>>>
>>>> So, I could pass mark as a url param via s:url within the display tag?
>>>>
>>>> Thanks for the information!
>>>>
>>>> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
>>>>> Assuming that each entry is named "entry" by displayTag, you can
>>>>> access it using "#attr.entry" (or "#attr['entry']")  to access it from
>>>>> the S2 tags.
>>>>>
>>>>> musachy
>>>>>
>>>>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>>>>> Christodoulakis<di...@gmail.com> wrote:
>>>>>> Yes, that is exactly the case, hmm.. Although, how is the
>>>>>> display:table tag finds the collection in the first place?
>>>>>>
>>>>>> Supposedly the display has some way of reaching the valuestack, it can
>>>>>> even resolve the deeper notation <display:table
>>>>>> name="goalToAchieve.entries"
>>>>>>
>>>>>> However, I will switch back to s:iterator to test if the syntax
>>>>>> suggested will work. I mainly used the display tag as a quick way to
>>>>>> sort the collection, but if I can't access the properties of the
>>>>>> objects I am iterating over, it isn't of much use in this case
>>>>>>
>>>>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>>>>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>>>>>> entries, you are using <display:table>.
>>>>>>>
>>>>>>> The syntax suggested will not work since <display:table> does not know
>>>>>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>>>>>> uses the value stack to resolve 'mark' which will not work here, you will
>>>>>>> need to replace %{mark} with the right syntax to work with <display:table>
>>>>>>> iterator.
>>>>>>>
>>>>>>> And I don't know anything about <display:table> so you will need to look up
>>>>>>> how to access the properties of the entities you are iterating over so as to
>>>>>>> build the URL.
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>>>>> dimi.chr@gmail.com> wrote:
>>>>>>>
>>>>>>>> I made the changes, but the view source indicates that the param
>>>>>>>> "mark" is not passed.
>>>>>>>>
>>>>>>>> The url linked is formed like this:
>>>>>>>>
>>>>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>>>>
>>>>>>>> The name and id params are fields of the parent object, the one
>>>>>>>> containing the collection.
>>>>>>>>
>>>>>>>> Actually, I tried with all fields taken from the collection object,
>>>>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>>>>> able to point to a field within a collection object too?
>>>>>>>>
>>>>>>>> It looks like individual collection object properties can be viewed
>>>>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>>>>> parameters for any other uses... unless I am missing something, or
>>>>>>>> doing something wrong.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>>>>>> wrote:
>>>>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>>>>>> > the name and id of the parent object.
>>>>>>>> >
>>>>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>>> >       <s:param name="mark" value="%{mark}" />
>>>>>>>> >   </s:url>
>>>>>>>> > ">Remove</a>
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>>>>> > dimi.chr@gmail.com> wrote:
>>>>>>>> >
>>>>>>>> >> Thanks for letting me know. Alright, so:
>>>>>>>> >>
>>>>>>>> >> This is the parent class:
>>>>>>>> >>
>>>>>>>> >> @Entity
>>>>>>>> >> public class GoalToAchieve {
>>>>>>>> >> @Id @GeneratedValue
>>>>>>>> >> private Long id;
>>>>>>>> >>
>>>>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>>>>> >>
>>>>>>>> >>        public Set<JournalEntry> getEntries() {
>>>>>>>> >>                return entries;
>>>>>>>> >>        }
>>>>>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>>>>>> >>                this.entries = entries;
>>>>>>>> >>        }
>>>>>>>> >>
>>>>>>>> >>        public void addEntry(JournalEntry newEntry){
>>>>>>>> >>                entries.add(newEntry);
>>>>>>>> >>        }
>>>>>>>> >>
>>>>>>>> >>        public void deleteEntry(JournalEntry entry){
>>>>>>>> >>                entries.remove(entry);
>>>>>>>> >>        }
>>>>>>>> >> ..plus some other standard fields with getters and setters
>>>>>>>> >>
>>>>>>>> >> This is the child-class:
>>>>>>>> >>
>>>>>>>> >> @Embeddable
>>>>>>>> >> public class JournalEntry {
>>>>>>>> >> @org.hibernate.annotations.Parent
>>>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>>>> >>
>>>>>>>> >> @Column
>>>>>>>> >> private Long mark;
>>>>>>>> >> public Long getMark() {
>>>>>>>> >>        return mark;
>>>>>>>> >> }
>>>>>>>> >> public void setMark(long mark){
>>>>>>>> >>        this.mark = mark;
>>>>>>>> >>         }
>>>>>>>> >>
>>>>>>>> >> @Column(length = 255, nullable = false)
>>>>>>>> >> private String entry;
>>>>>>>> >>
>>>>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>>>>> >> @Column(nullable = false, updatable = false)
>>>>>>>> >> private Date insertDate = new Date();
>>>>>>>> >>
>>>>>>>> >> ..plus the rest getters and setters
>>>>>>>> >>
>>>>>>>> >> And this this the jsp part where I display the collection:
>>>>>>>> >>
>>>>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>>>>> uid="thisGoal">
>>>>>>>> >>        <display:column property="entry" />
>>>>>>>> >>        <display:column property="date" sortable="true"
>>>>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>>>>> >>        <display:column property="mark" />
>>>>>>>> >>  <display:column>
>>>>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>>> >>        <s:param name="mark" value="#mark" />
>>>>>>>> >>    </s:url>
>>>>>>>> >>    ">Edit</a>
>>>>>>>> >> </display:column>
>>>>>>>> >> <display:column>
>>>>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>>> >>        <s:param name="mark" value="entry.mark" />
>>>>>>>> >>        <s:property value="%{entry}"/>
>>>>>>>> >>    </s:url>
>>>>>>>> >> ">Remove</a>
>>>>>>>> >> </display:column>
>>>>>>>> >> </display:table>
>>>>>>>> >> </s:if>
>>>>>>>> >>
>>>>>>>> >> ..and the delete action, which should take an entry reference and
>>>>>>>> >> remove it from the collections looks like this:
>>>>>>>> >>
>>>>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>>>>> >> public String execute(){
>>>>>>>> >>                goalToAchieve.deleteEntry(entry);
>>>>>>>> >>
>>>>>>>> >>                return SUCCESS;
>>>>>>>> >>        }
>>>>>>>> >>
>>>>>>>> >>        private JournalEntry entry;
>>>>>>>> >>        private GoalToAchieve goalToAchieve;
>>>>>>>> >>        private long id;
>>>>>>>> >>
>>>>>>>> >> ... + getters and setters
>>>>>>>> >>
>>>>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>>>>> >> would do a lookup within the action to find the entry object and
>>>>>>>> >> remove it from the parent object collection, by calling
>>>>>>>> >> deleteEntry(JournalEntry entry)
>>>>>>>> >>
>>>>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>>>>>> >> wrote:
>>>>>>>> >> > You are not providing enough information for anyone to help you. Since
>>>>>>>> >> you
>>>>>>>> >> > have changed your object and the jsp you had better include them with
>>>>>>>> any
>>>>>>>> >> > request.
>>>>>>>> >> >
>>>>>>>> >> >
>>>>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>>>>> >> > dimi.chr@gmail.com> wrote:
>>>>>>>> >> >
>>>>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>>>>>> >> >> field based
>>>>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>>>>> >> >> parameter.
>>>>>>>> >> >>
>>>>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>>>>> >> >>
>>>>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>>>>> >> >> </s:url>
>>>>>>>> >> >>  ">Edit</a>
>>>>>>>> >> >>
>>>>>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>>>>>> >> >> the url string. I think this is because the only object available on
>>>>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>>>>>> >> >> each entry object. In other words, the display or iterator help me
>>>>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>>>>> >> >> something wrong.
>>>>>>>> >> >>
>>>>>>>> >> >
>>>>>>>> >>
>>>>>>>> >> ---------------------------------------------------------------------
>>>>>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>>> >>
>>>>>>>> >>
>>>>>>>> >
>>>>>>>>
>>>>>>>> ---------------------------------------------------------------------
>>>>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>
>>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
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Re: updating or deleting a component from a collection through display tag

[Musachy Barroso <mu...@gmail.com>]

you can sue that notation anywhere. A tip that will save you a lot of
time, always wrap the OGNl expressions with %{}, that's why the first
hidden is not getting evaluated. The second one has an empty value
because "goalToAchieve" is probably not pointing to anything.

btw what #attr does is search for a value in all scopes (page,
request, session , application)

musahcy

On Mon, Jul 13, 2009 at 5:57 PM, Dimitrios
Christodoulakis<di...@gmail.com> wrote:
> Thanks again for helping out Musachy,
> I was wondering if there are any rules regarding when the notation you
> suggested below can be used. it works perfectly for setting url
> params.
>
> I was trying to use it (with struts2 tags) within a form (which is
> within the display:column tag) to pass the value to an action:
>
> <display:column>
>        <s:form action="UpdateEntryForm">
>        <s:hidden name="mark" value="#attr.thisEntry.mark" />
>        <s:hiddenname="name" value="%{goalToAchieve.name}" />
>        <s:submit value="Edit"/>
>        </s:form>
> </display:column>
>
> This creates an "Edit" button in each row for every object I iterate
> over, and I hoped to use the s:hidden tag to populate the underlying
> UpdateEntryForm action. I also try to test it by printing from the
> execute method as listed below, but the console output is just the
> literal for the mark and zero for the primitive:
>
> This id is: 0
> This name is: #attr.thisEntry.mark
>
> My action class:
>
> public class UpdateEntryForm extends ActionSupport{
> public String execute(){
>                System.out.println("This id is: "+ getId());
>                System.out.println("This name is: "+ getMark());
>                return SUCCESS;
>        }
> private String name;
> private long mark;
> public String getName() {
>                return name;
>        }
>        public void setName(String name){
>                this.name = name;
>        }
>
>        public String getMark() {
>                return mark;
>        }
>        public void setMark(String mark){
>                this.mark = mark;
>        }
> }
>
> Is there something wrong with the code above? Thanks again!
>
> On Mon, Jul 13, 2009 at 2:03 PM, Musachy Barroso<mu...@gmail.com> wrote:
>> The current row used by displaytag is pushed under the name set in
>> uid, so you could do this:
>>
>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>> <display:column>
>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>> <s:param name="date" value="#attr.thisGoal.mark" />
>>  </s:url>
>> ">Remove</a>
>> </display:column>
>>
>> musachy
>>
>> On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
>> Christodoulakis<di...@gmail.com> wrote:
>>> Thanks. So, if I wanted to access a particular property (say this
>>> property is called mark) of an "entry" object which I am iterating
>>> over, I would do something like the following:
>>>
>>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>> <display:column property="entry" />
>>> <display:column property="date" sortable="true"
>>> defaultorder="ascending" title="TimeStamp"/>
>>> <display:column property="mark" />
>>> <display:column>
>>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>> <s:param name="id" value="%{goalToAchieve.id}" />
>>> <s:param name="date" value="#attr.entry.mark" />
>>>   </s:url>
>>> ">Remove</a>
>>> </display:column>
>>>
>>> So, I could pass mark as a url param via s:url within the display tag?
>>>
>>> Thanks for the information!
>>>
>>> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
>>>> Assuming that each entry is named "entry" by displayTag, you can
>>>> access it using "#attr.entry" (or "#attr['entry']")  to access it from
>>>> the S2 tags.
>>>>
>>>> musachy
>>>>
>>>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>>>> Christodoulakis<di...@gmail.com> wrote:
>>>>> Yes, that is exactly the case, hmm.. Although, how is the
>>>>> display:table tag finds the collection in the first place?
>>>>>
>>>>> Supposedly the display has some way of reaching the valuestack, it can
>>>>> even resolve the deeper notation <display:table
>>>>> name="goalToAchieve.entries"
>>>>>
>>>>> However, I will switch back to s:iterator to test if the syntax
>>>>> suggested will work. I mainly used the display tag as a quick way to
>>>>> sort the collection, but if I can't access the properties of the
>>>>> objects I am iterating over, it isn't of much use in this case
>>>>>
>>>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>>>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>>>>> entries, you are using <display:table>.
>>>>>>
>>>>>> The syntax suggested will not work since <display:table> does not know
>>>>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>>>>> uses the value stack to resolve 'mark' which will not work here, you will
>>>>>> need to replace %{mark} with the right syntax to work with <display:table>
>>>>>> iterator.
>>>>>>
>>>>>> And I don't know anything about <display:table> so you will need to look up
>>>>>> how to access the properties of the entities you are iterating over so as to
>>>>>> build the URL.
>>>>>>
>>>>>>
>>>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>>>> dimi.chr@gmail.com> wrote:
>>>>>>
>>>>>>> I made the changes, but the view source indicates that the param
>>>>>>> "mark" is not passed.
>>>>>>>
>>>>>>> The url linked is formed like this:
>>>>>>>
>>>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>>>
>>>>>>> The name and id params are fields of the parent object, the one
>>>>>>> containing the collection.
>>>>>>>
>>>>>>> Actually, I tried with all fields taken from the collection object,
>>>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>>>> able to point to a field within a collection object too?
>>>>>>>
>>>>>>> It looks like individual collection object properties can be viewed
>>>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>>>> parameters for any other uses... unless I am missing something, or
>>>>>>> doing something wrong.
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>>>>> wrote:
>>>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>>>>> > the name and id of the parent object.
>>>>>>> >
>>>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>> >       <s:param name="mark" value="%{mark}" />
>>>>>>> >   </s:url>
>>>>>>> > ">Remove</a>
>>>>>>> >
>>>>>>> >
>>>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>>>> > dimi.chr@gmail.com> wrote:
>>>>>>> >
>>>>>>> >> Thanks for letting me know. Alright, so:
>>>>>>> >>
>>>>>>> >> This is the parent class:
>>>>>>> >>
>>>>>>> >> @Entity
>>>>>>> >> public class GoalToAchieve {
>>>>>>> >> @Id @GeneratedValue
>>>>>>> >> private Long id;
>>>>>>> >>
>>>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>>>> >>
>>>>>>> >>        public Set<JournalEntry> getEntries() {
>>>>>>> >>                return entries;
>>>>>>> >>        }
>>>>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>>>>> >>                this.entries = entries;
>>>>>>> >>        }
>>>>>>> >>
>>>>>>> >>        public void addEntry(JournalEntry newEntry){
>>>>>>> >>                entries.add(newEntry);
>>>>>>> >>        }
>>>>>>> >>
>>>>>>> >>        public void deleteEntry(JournalEntry entry){
>>>>>>> >>                entries.remove(entry);
>>>>>>> >>        }
>>>>>>> >> ..plus some other standard fields with getters and setters
>>>>>>> >>
>>>>>>> >> This is the child-class:
>>>>>>> >>
>>>>>>> >> @Embeddable
>>>>>>> >> public class JournalEntry {
>>>>>>> >> @org.hibernate.annotations.Parent
>>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>>> >>
>>>>>>> >> @Column
>>>>>>> >> private Long mark;
>>>>>>> >> public Long getMark() {
>>>>>>> >>        return mark;
>>>>>>> >> }
>>>>>>> >> public void setMark(long mark){
>>>>>>> >>        this.mark = mark;
>>>>>>> >>         }
>>>>>>> >>
>>>>>>> >> @Column(length = 255, nullable = false)
>>>>>>> >> private String entry;
>>>>>>> >>
>>>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>>>> >> @Column(nullable = false, updatable = false)
>>>>>>> >> private Date insertDate = new Date();
>>>>>>> >>
>>>>>>> >> ..plus the rest getters and setters
>>>>>>> >>
>>>>>>> >> And this this the jsp part where I display the collection:
>>>>>>> >>
>>>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>>>> uid="thisGoal">
>>>>>>> >>        <display:column property="entry" />
>>>>>>> >>        <display:column property="date" sortable="true"
>>>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>>>> >>        <display:column property="mark" />
>>>>>>> >>  <display:column>
>>>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>> >>        <s:param name="mark" value="#mark" />
>>>>>>> >>    </s:url>
>>>>>>> >>    ">Edit</a>
>>>>>>> >> </display:column>
>>>>>>> >> <display:column>
>>>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>>> >>        <s:param name="mark" value="entry.mark" />
>>>>>>> >>        <s:property value="%{entry}"/>
>>>>>>> >>    </s:url>
>>>>>>> >> ">Remove</a>
>>>>>>> >> </display:column>
>>>>>>> >> </display:table>
>>>>>>> >> </s:if>
>>>>>>> >>
>>>>>>> >> ..and the delete action, which should take an entry reference and
>>>>>>> >> remove it from the collections looks like this:
>>>>>>> >>
>>>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>>>> >> public String execute(){
>>>>>>> >>                goalToAchieve.deleteEntry(entry);
>>>>>>> >>
>>>>>>> >>                return SUCCESS;
>>>>>>> >>        }
>>>>>>> >>
>>>>>>> >>        private JournalEntry entry;
>>>>>>> >>        private GoalToAchieve goalToAchieve;
>>>>>>> >>        private long id;
>>>>>>> >>
>>>>>>> >> ... + getters and setters
>>>>>>> >>
>>>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>>>> >> would do a lookup within the action to find the entry object and
>>>>>>> >> remove it from the parent object collection, by calling
>>>>>>> >> deleteEntry(JournalEntry entry)
>>>>>>> >>
>>>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>>>>> >> wrote:
>>>>>>> >> > You are not providing enough information for anyone to help you. Since
>>>>>>> >> you
>>>>>>> >> > have changed your object and the jsp you had better include them with
>>>>>>> any
>>>>>>> >> > request.
>>>>>>> >> >
>>>>>>> >> >
>>>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>>>> >> > dimi.chr@gmail.com> wrote:
>>>>>>> >> >
>>>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>>>>> >> >> field based
>>>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>>>> >> >> parameter.
>>>>>>> >> >>
>>>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>>>> >> >>
>>>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>>>> >> >> </s:url>
>>>>>>> >> >>  ">Edit</a>
>>>>>>> >> >>
>>>>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>>>>> >> >> the url string. I think this is because the only object available on
>>>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>>>>> >> >> each entry object. In other words, the display or iterator help me
>>>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>>>> >> >> something wrong.
>>>>>>> >> >>
>>>>>>> >> >
>>>>>>> >>
>>>>>>> >> ---------------------------------------------------------------------
>>>>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>> >>
>>>>>>> >>
>>>>>>> >
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>>
>>
>> --
>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>



-- 
"Hey you! Would you help me to carry the stone?" Pink Floyd

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Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Thanks again for helping out Musachy,
I was wondering if there are any rules regarding when the notation you
suggested below can be used. it works perfectly for setting url
params.

I was trying to use it (with struts2 tags) within a form (which is
within the display:column tag) to pass the value to an action:

<display:column>	
    	<s:form action="UpdateEntryForm">
    	<s:hidden name="mark" value="#attr.thisEntry.mark" />
    	<s:hiddenname="name" value="%{goalToAchieve.name}" />
    	<s:submit value="Edit"/>
    	</s:form>
</display:column>

This creates an "Edit" button in each row for every object I iterate
over, and I hoped to use the s:hidden tag to populate the underlying
UpdateEntryForm action. I also try to test it by printing from the
execute method as listed below, but the console output is just the
literal for the mark and zero for the primitive:

This id is: 0
This name is: #attr.thisEntry.mark

My action class:

public class UpdateEntryForm extends ActionSupport{
public String execute(){
		System.out.println("This id is: "+ getId());
		System.out.println("This name is: "+ getMark());
		return SUCCESS;	
	}
private String name;
private long mark;
public String getName() {
		return name;
	}
	public void setName(String name){
		this.name = name;
	}
	
	public String getMark() {
		return mark;
	}
	public void setMark(String mark){
		this.mark = mark;
	}
}

Is there something wrong with the code above? Thanks again!

On Mon, Jul 13, 2009 at 2:03 PM, Musachy Barroso<mu...@gmail.com> wrote:
> The current row used by displaytag is pushed under the name set in
> uid, so you could do this:
>
> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
> <display:column>
> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
> <s:param name="date" value="#attr.thisGoal.mark" />
>  </s:url>
> ">Remove</a>
> </display:column>
>
> musachy
>
> On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
> Christodoulakis<di...@gmail.com> wrote:
>> Thanks. So, if I wanted to access a particular property (say this
>> property is called mark) of an "entry" object which I am iterating
>> over, I would do something like the following:
>>
>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>> <display:column property="entry" />
>> <display:column property="date" sortable="true"
>> defaultorder="ascending" title="TimeStamp"/>
>> <display:column property="mark" />
>> <display:column>
>> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> <s:param name="id" value="%{goalToAchieve.id}" />
>> <s:param name="date" value="#attr.entry.mark" />
>>   </s:url>
>> ">Remove</a>
>> </display:column>
>>
>> So, I could pass mark as a url param via s:url within the display tag?
>>
>> Thanks for the information!
>>
>> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
>>> Assuming that each entry is named "entry" by displayTag, you can
>>> access it using "#attr.entry" (or "#attr['entry']")  to access it from
>>> the S2 tags.
>>>
>>> musachy
>>>
>>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>>> Christodoulakis<di...@gmail.com> wrote:
>>>> Yes, that is exactly the case, hmm.. Although, how is the
>>>> display:table tag finds the collection in the first place?
>>>>
>>>> Supposedly the display has some way of reaching the valuestack, it can
>>>> even resolve the deeper notation <display:table
>>>> name="goalToAchieve.entries"
>>>>
>>>> However, I will switch back to s:iterator to test if the syntax
>>>> suggested will work. I mainly used the display tag as a quick way to
>>>> sort the collection, but if I can't access the properties of the
>>>> objects I am iterating over, it isn't of much use in this case
>>>>
>>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>>>> entries, you are using <display:table>.
>>>>>
>>>>> The syntax suggested will not work since <display:table> does not know
>>>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>>>> uses the value stack to resolve 'mark' which will not work here, you will
>>>>> need to replace %{mark} with the right syntax to work with <display:table>
>>>>> iterator.
>>>>>
>>>>> And I don't know anything about <display:table> so you will need to look up
>>>>> how to access the properties of the entities you are iterating over so as to
>>>>> build the URL.
>>>>>
>>>>>
>>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>>> dimi.chr@gmail.com> wrote:
>>>>>
>>>>>> I made the changes, but the view source indicates that the param
>>>>>> "mark" is not passed.
>>>>>>
>>>>>> The url linked is formed like this:
>>>>>>
>>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>>
>>>>>> The name and id params are fields of the parent object, the one
>>>>>> containing the collection.
>>>>>>
>>>>>> Actually, I tried with all fields taken from the collection object,
>>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>>> able to point to a field within a collection object too?
>>>>>>
>>>>>> It looks like individual collection object properties can be viewed
>>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>>> parameters for any other uses... unless I am missing something, or
>>>>>> doing something wrong.
>>>>>>
>>>>>>
>>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>>>> wrote:
>>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>>>> > the name and id of the parent object.
>>>>>> >
>>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>> >       <s:param name="mark" value="%{mark}" />
>>>>>> >   </s:url>
>>>>>> > ">Remove</a>
>>>>>> >
>>>>>> >
>>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>>> > dimi.chr@gmail.com> wrote:
>>>>>> >
>>>>>> >> Thanks for letting me know. Alright, so:
>>>>>> >>
>>>>>> >> This is the parent class:
>>>>>> >>
>>>>>> >> @Entity
>>>>>> >> public class GoalToAchieve {
>>>>>> >> @Id @GeneratedValue
>>>>>> >> private Long id;
>>>>>> >>
>>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>>> >>
>>>>>> >>        public Set<JournalEntry> getEntries() {
>>>>>> >>                return entries;
>>>>>> >>        }
>>>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>>>> >>                this.entries = entries;
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        public void addEntry(JournalEntry newEntry){
>>>>>> >>                entries.add(newEntry);
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        public void deleteEntry(JournalEntry entry){
>>>>>> >>                entries.remove(entry);
>>>>>> >>        }
>>>>>> >> ..plus some other standard fields with getters and setters
>>>>>> >>
>>>>>> >> This is the child-class:
>>>>>> >>
>>>>>> >> @Embeddable
>>>>>> >> public class JournalEntry {
>>>>>> >> @org.hibernate.annotations.Parent
>>>>>> >> private GoalToAchieve goalToAchieve;
>>>>>> >>
>>>>>> >> @Column
>>>>>> >> private Long mark;
>>>>>> >> public Long getMark() {
>>>>>> >>        return mark;
>>>>>> >> }
>>>>>> >> public void setMark(long mark){
>>>>>> >>        this.mark = mark;
>>>>>> >>         }
>>>>>> >>
>>>>>> >> @Column(length = 255, nullable = false)
>>>>>> >> private String entry;
>>>>>> >>
>>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>>> >> @Column(nullable = false, updatable = false)
>>>>>> >> private Date insertDate = new Date();
>>>>>> >>
>>>>>> >> ..plus the rest getters and setters
>>>>>> >>
>>>>>> >> And this this the jsp part where I display the collection:
>>>>>> >>
>>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>>> uid="thisGoal">
>>>>>> >>        <display:column property="entry" />
>>>>>> >>        <display:column property="date" sortable="true"
>>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>>> >>        <display:column property="mark" />
>>>>>> >>  <display:column>
>>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >>        <s:param name="mark" value="#mark" />
>>>>>> >>    </s:url>
>>>>>> >>    ">Edit</a>
>>>>>> >> </display:column>
>>>>>> >> <display:column>
>>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>>>> >>        <s:param name="mark" value="entry.mark" />
>>>>>> >>        <s:property value="%{entry}"/>
>>>>>> >>    </s:url>
>>>>>> >> ">Remove</a>
>>>>>> >> </display:column>
>>>>>> >> </display:table>
>>>>>> >> </s:if>
>>>>>> >>
>>>>>> >> ..and the delete action, which should take an entry reference and
>>>>>> >> remove it from the collections looks like this:
>>>>>> >>
>>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>>> >> public String execute(){
>>>>>> >>                goalToAchieve.deleteEntry(entry);
>>>>>> >>
>>>>>> >>                return SUCCESS;
>>>>>> >>        }
>>>>>> >>
>>>>>> >>        private JournalEntry entry;
>>>>>> >>        private GoalToAchieve goalToAchieve;
>>>>>> >>        private long id;
>>>>>> >>
>>>>>> >> ... + getters and setters
>>>>>> >>
>>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>>> >> would do a lookup within the action to find the entry object and
>>>>>> >> remove it from the parent object collection, by calling
>>>>>> >> deleteEntry(JournalEntry entry)
>>>>>> >>
>>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>>>> >> wrote:
>>>>>> >> > You are not providing enough information for anyone to help you. Since
>>>>>> >> you
>>>>>> >> > have changed your object and the jsp you had better include them with
>>>>>> any
>>>>>> >> > request.
>>>>>> >> >
>>>>>> >> >
>>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>>> >> > dimi.chr@gmail.com> wrote:
>>>>>> >> >
>>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>>>> >> >> field based
>>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>>> >> >> parameter.
>>>>>> >> >>
>>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>>> >> >>
>>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>>> >> >> </s:url>
>>>>>> >> >>  ">Edit</a>
>>>>>> >> >>
>>>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>>>> >> >> the url string. I think this is because the only object available on
>>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>>>> >> >> each entry object. In other words, the display or iterator help me
>>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>>> >> >> something wrong.
>>>>>> >> >>
>>>>>> >> >
>>>>>> >>
>>>>>> >> ---------------------------------------------------------------------
>>>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>>>> >>
>>>>>> >>
>>>>>> >
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>>
>>>>>>
>>>>>
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>

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Re: updating or deleting a component from a collection through display tag

[Musachy Barroso <mu...@gmail.com>]

The current row used by displaytag is pushed under the name set in
uid, so you could do this:

<display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
<display:column>
<a href="<s:url action='DeleteEntryForm' escapeAmp="false">
<s:param name="date" value="#attr.thisGoal.mark" />
  </s:url>
">Remove</a>
</display:column>

musachy

On Mon, Jul 13, 2009 at 11:17 AM, Dimitrios
Christodoulakis<di...@gmail.com> wrote:
> Thanks. So, if I wanted to access a particular property (say this
> property is called mark) of an "entry" object which I am iterating
> over, I would do something like the following:
>
> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
> <display:column property="entry" />
> <display:column property="date" sortable="true"
> defaultorder="ascending" title="TimeStamp"/>
> <display:column property="mark" />
> <display:column>
> <a href="<s:url action='DeleteEntryForm' escapeAmp="false">
> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> <s:param name="id" value="%{goalToAchieve.id}" />
> <s:param name="date" value="#attr.entry.mark" />
>   </s:url>
> ">Remove</a>
> </display:column>
>
> So, I could pass mark as a url param via s:url within the display tag?
>
> Thanks for the information!
>
> On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
>> Assuming that each entry is named "entry" by displayTag, you can
>> access it using "#attr.entry" (or "#attr['entry']")  to access it from
>> the S2 tags.
>>
>> musachy
>>
>> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
>> Christodoulakis<di...@gmail.com> wrote:
>>> Yes, that is exactly the case, hmm.. Although, how is the
>>> display:table tag finds the collection in the first place?
>>>
>>> Supposedly the display has some way of reaching the valuestack, it can
>>> even resolve the deeper notation <display:table
>>> name="goalToAchieve.entries"
>>>
>>> However, I will switch back to s:iterator to test if the syntax
>>> suggested will work. I mainly used the display tag as a quick way to
>>> sort the collection, but if I can't access the properties of the
>>> objects I am iterating over, it isn't of much use in this case
>>>
>>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>>> entries, you are using <display:table>.
>>>>
>>>> The syntax suggested will not work since <display:table> does not know
>>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>>> uses the value stack to resolve 'mark' which will not work here, you will
>>>> need to replace %{mark} with the right syntax to work with <display:table>
>>>> iterator.
>>>>
>>>> And I don't know anything about <display:table> so you will need to look up
>>>> how to access the properties of the entities you are iterating over so as to
>>>> build the URL.
>>>>
>>>>
>>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>>> dimi.chr@gmail.com> wrote:
>>>>
>>>>> I made the changes, but the view source indicates that the param
>>>>> "mark" is not passed.
>>>>>
>>>>> The url linked is formed like this:
>>>>>
>>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>>
>>>>> The name and id params are fields of the parent object, the one
>>>>> containing the collection.
>>>>>
>>>>> Actually, I tried with all fields taken from the collection object,
>>>>> like entry, and date but none gets passed as a param. Only properties
>>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>>> able to point to a field within a collection object too?
>>>>>
>>>>> It looks like individual collection object properties can be viewed
>>>>> using the iterator/display, but cannot be "captured" or passed as
>>>>> parameters for any other uses... unless I am missing something, or
>>>>> doing something wrong.
>>>>>
>>>>>
>>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>>> wrote:
>>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>>> > the name and id of the parent object.
>>>>> >
>>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>>> >       <s:param name="mark" value="%{mark}" />
>>>>> >   </s:url>
>>>>> > ">Remove</a>
>>>>> >
>>>>> >
>>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>>> > dimi.chr@gmail.com> wrote:
>>>>> >
>>>>> >> Thanks for letting me know. Alright, so:
>>>>> >>
>>>>> >> This is the parent class:
>>>>> >>
>>>>> >> @Entity
>>>>> >> public class GoalToAchieve {
>>>>> >> @Id @GeneratedValue
>>>>> >> private Long id;
>>>>> >>
>>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>>> >>
>>>>> >>        public Set<JournalEntry> getEntries() {
>>>>> >>                return entries;
>>>>> >>        }
>>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>>> >>                this.entries = entries;
>>>>> >>        }
>>>>> >>
>>>>> >>        public void addEntry(JournalEntry newEntry){
>>>>> >>                entries.add(newEntry);
>>>>> >>        }
>>>>> >>
>>>>> >>        public void deleteEntry(JournalEntry entry){
>>>>> >>                entries.remove(entry);
>>>>> >>        }
>>>>> >> ..plus some other standard fields with getters and setters
>>>>> >>
>>>>> >> This is the child-class:
>>>>> >>
>>>>> >> @Embeddable
>>>>> >> public class JournalEntry {
>>>>> >> @org.hibernate.annotations.Parent
>>>>> >> private GoalToAchieve goalToAchieve;
>>>>> >>
>>>>> >> @Column
>>>>> >> private Long mark;
>>>>> >> public Long getMark() {
>>>>> >>        return mark;
>>>>> >> }
>>>>> >> public void setMark(long mark){
>>>>> >>        this.mark = mark;
>>>>> >>         }
>>>>> >>
>>>>> >> @Column(length = 255, nullable = false)
>>>>> >> private String entry;
>>>>> >>
>>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>>> >> @Column(nullable = false, updatable = false)
>>>>> >> private Date insertDate = new Date();
>>>>> >>
>>>>> >> ..plus the rest getters and setters
>>>>> >>
>>>>> >> And this this the jsp part where I display the collection:
>>>>> >>
>>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>>> uid="thisGoal">
>>>>> >>        <display:column property="entry" />
>>>>> >>        <display:column property="date" sortable="true"
>>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>>> >>        <display:column property="mark" />
>>>>> >>  <display:column>
>>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>> >>        <s:param name="mark" value="#mark" />
>>>>> >>    </s:url>
>>>>> >>    ">Edit</a>
>>>>> >> </display:column>
>>>>> >> <display:column>
>>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>>> >>        <s:param name="mark" value="entry.mark" />
>>>>> >>        <s:property value="%{entry}"/>
>>>>> >>    </s:url>
>>>>> >> ">Remove</a>
>>>>> >> </display:column>
>>>>> >> </display:table>
>>>>> >> </s:if>
>>>>> >>
>>>>> >> ..and the delete action, which should take an entry reference and
>>>>> >> remove it from the collections looks like this:
>>>>> >>
>>>>> >> public class DeleteEntry extends ActionSupport{
>>>>> >> public String execute(){
>>>>> >>                goalToAchieve.deleteEntry(entry);
>>>>> >>
>>>>> >>                return SUCCESS;
>>>>> >>        }
>>>>> >>
>>>>> >>        private JournalEntry entry;
>>>>> >>        private GoalToAchieve goalToAchieve;
>>>>> >>        private long id;
>>>>> >>
>>>>> >> ... + getters and setters
>>>>> >>
>>>>> >> I guess right now, my problem has become how to pass a parameter
>>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>>> >> would do a lookup within the action to find the entry object and
>>>>> >> remove it from the parent object collection, by calling
>>>>> >> deleteEntry(JournalEntry entry)
>>>>> >>
>>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>>> >> wrote:
>>>>> >> > You are not providing enough information for anyone to help you. Since
>>>>> >> you
>>>>> >> > have changed your object and the jsp you had better include them with
>>>>> any
>>>>> >> > request.
>>>>> >> >
>>>>> >> >
>>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>>> >> > dimi.chr@gmail.com> wrote:
>>>>> >> >
>>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>>> >> >> field based
>>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>>> >> >> parameter.
>>>>> >> >>
>>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>>> >> >>
>>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>>> >> >> </s:url>
>>>>> >> >>  ">Edit</a>
>>>>> >> >>
>>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>>> >> >> the url string. I think this is because the only object available on
>>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>>> >> >> each entry object. In other words, the display or iterator help me
>>>>> >> >> view the collection objects, but not extract and use any of their
>>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>>> >> >> something wrong.
>>>>> >> >>
>>>>> >> >
>>>>> >>
>>>>> >> ---------------------------------------------------------------------
>>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>>> >>
>>>>> >>
>>>>> >
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>
>>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>>
>>
>> --
>> "Hey you! Would you help me to carry the stone?" Pink Floyd
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>



-- 
"Hey you! Would you help me to carry the stone?" Pink Floyd

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Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Thanks. So, if I wanted to access a particular property (say this
property is called mark) of an "entry" object which I am iterating
over, I would do something like the following:

<display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
<display:column property="entry" />
<display:column property="date" sortable="true"
defaultorder="ascending" title="TimeStamp"/>
<display:column property="mark" />
<display:column>				
<a href="<s:url action='DeleteEntryForm' escapeAmp="false">
<s:param name="name" value="%{goalToAchieve.owner.fullName}" />
<s:param name="id" value="%{goalToAchieve.id}" />
<s:param name="date" value="#attr.entry.mark" />
   </s:url>
">Remove</a>								
</display:column>

So, I could pass mark as a url param via s:url within the display tag?

Thanks for the information!

On Mon, Jul 13, 2009 at 1:08 PM, Musachy Barroso<mu...@gmail.com> wrote:
> Assuming that each entry is named "entry" by displayTag, you can
> access it using "#attr.entry" (or "#attr['entry']")  to access it from
> the S2 tags.
>
> musachy
>
> On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
> Christodoulakis<di...@gmail.com> wrote:
>> Yes, that is exactly the case, hmm.. Although, how is the
>> display:table tag finds the collection in the first place?
>>
>> Supposedly the display has some way of reaching the valuestack, it can
>> even resolve the deeper notation <display:table
>> name="goalToAchieve.entries"
>>
>> However, I will switch back to s:iterator to test if the syntax
>> suggested will work. I mainly used the display tag as a quick way to
>> sort the collection, but if I can't access the properties of the
>> objects I am iterating over, it isn't of much use in this case
>>
>> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>>> entries, you are using <display:table>.
>>>
>>> The syntax suggested will not work since <display:table> does not know
>>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>>> uses the value stack to resolve 'mark' which will not work here, you will
>>> need to replace %{mark} with the right syntax to work with <display:table>
>>> iterator.
>>>
>>> And I don't know anything about <display:table> so you will need to look up
>>> how to access the properties of the entities you are iterating over so as to
>>> build the URL.
>>>
>>>
>>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>>> dimi.chr@gmail.com> wrote:
>>>
>>>> I made the changes, but the view source indicates that the param
>>>> "mark" is not passed.
>>>>
>>>> The url linked is formed like this:
>>>>
>>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>>
>>>> The name and id params are fields of the parent object, the one
>>>> containing the collection.
>>>>
>>>> Actually, I tried with all fields taken from the collection object,
>>>> like entry, and date but none gets passed as a param. Only properties
>>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>>> able to point to a field within a collection object too?
>>>>
>>>> It looks like individual collection object properties can be viewed
>>>> using the iterator/display, but cannot be "captured" or passed as
>>>> parameters for any other uses... unless I am missing something, or
>>>> doing something wrong.
>>>>
>>>>
>>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>>> wrote:
>>>> > Looks like you need to change entry.mark to just mark and remove the
>>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>>> > the name and id of the parent object.
>>>> >
>>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>>> >       <s:param name="mark" value="%{mark}" />
>>>> >   </s:url>
>>>> > ">Remove</a>
>>>> >
>>>> >
>>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>>> > dimi.chr@gmail.com> wrote:
>>>> >
>>>> >> Thanks for letting me know. Alright, so:
>>>> >>
>>>> >> This is the parent class:
>>>> >>
>>>> >> @Entity
>>>> >> public class GoalToAchieve {
>>>> >> @Id @GeneratedValue
>>>> >> private Long id;
>>>> >>
>>>> >> @org.hibernate.annotations.CollectionOfElements
>>>> >> @JoinTable (name="GoalToAchieve_entry",
>>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>>> >>
>>>> >>        public Set<JournalEntry> getEntries() {
>>>> >>                return entries;
>>>> >>        }
>>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>>> >>                this.entries = entries;
>>>> >>        }
>>>> >>
>>>> >>        public void addEntry(JournalEntry newEntry){
>>>> >>                entries.add(newEntry);
>>>> >>        }
>>>> >>
>>>> >>        public void deleteEntry(JournalEntry entry){
>>>> >>                entries.remove(entry);
>>>> >>        }
>>>> >> ..plus some other standard fields with getters and setters
>>>> >>
>>>> >> This is the child-class:
>>>> >>
>>>> >> @Embeddable
>>>> >> public class JournalEntry {
>>>> >> @org.hibernate.annotations.Parent
>>>> >> private GoalToAchieve goalToAchieve;
>>>> >>
>>>> >> @Column
>>>> >> private Long mark;
>>>> >> public Long getMark() {
>>>> >>        return mark;
>>>> >> }
>>>> >> public void setMark(long mark){
>>>> >>        this.mark = mark;
>>>> >>         }
>>>> >>
>>>> >> @Column(length = 255, nullable = false)
>>>> >> private String entry;
>>>> >>
>>>> >> @Temporal(TemporalType.TIMESTAMP)
>>>> >> @Column(nullable = false, updatable = false)
>>>> >> private Date insertDate = new Date();
>>>> >>
>>>> >> ..plus the rest getters and setters
>>>> >>
>>>> >> And this this the jsp part where I display the collection:
>>>> >>
>>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>>> uid="thisGoal">
>>>> >>        <display:column property="entry" />
>>>> >>        <display:column property="date" sortable="true"
>>>> >> defaultorder="ascending" title="TimeStamp"/>
>>>> >>        <display:column property="mark" />
>>>> >>  <display:column>
>>>> >> <a href="<s:url action='UpdateEntryForm'>
>>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>> >>        <s:param name="mark" value="#mark" />
>>>> >>    </s:url>
>>>> >>    ">Edit</a>
>>>> >> </display:column>
>>>> >> <display:column>
>>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>>> >>        <s:param name="mark" value="entry.mark" />
>>>> >>        <s:property value="%{entry}"/>
>>>> >>    </s:url>
>>>> >> ">Remove</a>
>>>> >> </display:column>
>>>> >> </display:table>
>>>> >> </s:if>
>>>> >>
>>>> >> ..and the delete action, which should take an entry reference and
>>>> >> remove it from the collections looks like this:
>>>> >>
>>>> >> public class DeleteEntry extends ActionSupport{
>>>> >> public String execute(){
>>>> >>                goalToAchieve.deleteEntry(entry);
>>>> >>
>>>> >>                return SUCCESS;
>>>> >>        }
>>>> >>
>>>> >>        private JournalEntry entry;
>>>> >>        private GoalToAchieve goalToAchieve;
>>>> >>        private long id;
>>>> >>
>>>> >> ... + getters and setters
>>>> >>
>>>> >> I guess right now, my problem has become how to pass a parameter
>>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>>> >> would do a lookup within the action to find the entry object and
>>>> >> remove it from the parent object collection, by calling
>>>> >> deleteEntry(JournalEntry entry)
>>>> >>
>>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>>> >> wrote:
>>>> >> > You are not providing enough information for anyone to help you. Since
>>>> >> you
>>>> >> > have changed your object and the jsp you had better include them with
>>>> any
>>>> >> > request.
>>>> >> >
>>>> >> >
>>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>>> >> > dimi.chr@gmail.com> wrote:
>>>> >> >
>>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>>> >> >> field based
>>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>>> >> >> parameter.
>>>> >> >>
>>>> >> >> For example, I am trying to add it as a url parameter below:
>>>> >> >>
>>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>>> >> >> <s:param name="mark" value="%{mark}" />
>>>> >> >> </s:url>
>>>> >> >>  ">Edit</a>
>>>> >> >>
>>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>>> >> >> the url string. I think this is because the only object available on
>>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>>> >> >> each entry object. In other words, the display or iterator help me
>>>> >> >> view the collection objects, but not extract and use any of their
>>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>>> >> >> something wrong.
>>>> >> >>
>>>> >> >
>>>> >>
>>>> >> ---------------------------------------------------------------------
>>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>>> >>
>>>> >>
>>>> >
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>
>>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
>
>
> --
> "Hey you! Would you help me to carry the stone?" Pink Floyd
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
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>
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Re: updating or deleting a component from a collection through display tag

[Musachy Barroso <mu...@gmail.com>]

Assuming that each entry is named "entry" by displayTag, you can
access it using "#attr.entry" (or "#attr['entry']")  to access it from
the S2 tags.

musachy

On Mon, Jul 13, 2009 at 10:27 AM, Dimitrios
Christodoulakis<di...@gmail.com> wrote:
> Yes, that is exactly the case, hmm.. Although, how is the
> display:table tag finds the collection in the first place?
>
> Supposedly the display has some way of reaching the valuestack, it can
> even resolve the deeper notation <display:table
> name="goalToAchieve.entries"
>
> However, I will switch back to s:iterator to test if the syntax
> suggested will work. I mainly used the display tag as a quick way to
> sort the collection, but if I can't access the properties of the
> objects I am iterating over, it isn't of much use in this case
>
> On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
>> OK, I see the problem now...  you are not using <s:iterator> to go thru the
>> entries, you are using <display:table>.
>>
>> The syntax suggested will not work since <display:table> does not know
>> anything about the value stack.The <s:param name="mark" value="%{mark}" />
>> uses the value stack to resolve 'mark' which will not work here, you will
>> need to replace %{mark} with the right syntax to work with <display:table>
>> iterator.
>>
>> And I don't know anything about <display:table> so you will need to look up
>> how to access the properties of the entities you are iterating over so as to
>> build the URL.
>>
>>
>> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
>> dimi.chr@gmail.com> wrote:
>>
>>> I made the changes, but the view source indicates that the param
>>> "mark" is not passed.
>>>
>>> The url linked is formed like this:
>>>
>>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>>
>>> The name and id params are fields of the parent object, the one
>>> containing the collection.
>>>
>>> Actually, I tried with all fields taken from the collection object,
>>> like entry, and date but none gets passed as a param. Only properties
>>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>>> able to point to a field within a collection object too?
>>>
>>> It looks like individual collection object properties can be viewed
>>> using the iterator/display, but cannot be "captured" or passed as
>>> parameters for any other uses... unless I am missing something, or
>>> doing something wrong.
>>>
>>>
>>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>>> wrote:
>>> > Looks like you need to change entry.mark to just mark and remove the
>>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>>> > the name and id of the parent object.
>>> >
>>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>>> >       <s:param name="mark" value="%{mark}" />
>>> >   </s:url>
>>> > ">Remove</a>
>>> >
>>> >
>>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>>> > dimi.chr@gmail.com> wrote:
>>> >
>>> >> Thanks for letting me know. Alright, so:
>>> >>
>>> >> This is the parent class:
>>> >>
>>> >> @Entity
>>> >> public class GoalToAchieve {
>>> >> @Id @GeneratedValue
>>> >> private Long id;
>>> >>
>>> >> @org.hibernate.annotations.CollectionOfElements
>>> >> @JoinTable (name="GoalToAchieve_entry",
>>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>> >>
>>> >>        public Set<JournalEntry> getEntries() {
>>> >>                return entries;
>>> >>        }
>>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>>> >>                this.entries = entries;
>>> >>        }
>>> >>
>>> >>        public void addEntry(JournalEntry newEntry){
>>> >>                entries.add(newEntry);
>>> >>        }
>>> >>
>>> >>        public void deleteEntry(JournalEntry entry){
>>> >>                entries.remove(entry);
>>> >>        }
>>> >> ..plus some other standard fields with getters and setters
>>> >>
>>> >> This is the child-class:
>>> >>
>>> >> @Embeddable
>>> >> public class JournalEntry {
>>> >> @org.hibernate.annotations.Parent
>>> >> private GoalToAchieve goalToAchieve;
>>> >>
>>> >> @Column
>>> >> private Long mark;
>>> >> public Long getMark() {
>>> >>        return mark;
>>> >> }
>>> >> public void setMark(long mark){
>>> >>        this.mark = mark;
>>> >>         }
>>> >>
>>> >> @Column(length = 255, nullable = false)
>>> >> private String entry;
>>> >>
>>> >> @Temporal(TemporalType.TIMESTAMP)
>>> >> @Column(nullable = false, updatable = false)
>>> >> private Date insertDate = new Date();
>>> >>
>>> >> ..plus the rest getters and setters
>>> >>
>>> >> And this this the jsp part where I display the collection:
>>> >>
>>> >> <s:if test="goalToAchieve.entries.size > 0">
>>> >> <display:table name="goalToAchieve.entries" requestURI=""
>>> uid="thisGoal">
>>> >>        <display:column property="entry" />
>>> >>        <display:column property="date" sortable="true"
>>> >> defaultorder="ascending" title="TimeStamp"/>
>>> >>        <display:column property="mark" />
>>> >>  <display:column>
>>> >> <a href="<s:url action='UpdateEntryForm'>
>>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>> >>        <s:param name="mark" value="#mark" />
>>> >>    </s:url>
>>> >>    ">Edit</a>
>>> >> </display:column>
>>> >> <display:column>
>>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>>> >>        <s:param name="mark" value="entry.mark" />
>>> >>        <s:property value="%{entry}"/>
>>> >>    </s:url>
>>> >> ">Remove</a>
>>> >> </display:column>
>>> >> </display:table>
>>> >> </s:if>
>>> >>
>>> >> ..and the delete action, which should take an entry reference and
>>> >> remove it from the collections looks like this:
>>> >>
>>> >> public class DeleteEntry extends ActionSupport{
>>> >> public String execute(){
>>> >>                goalToAchieve.deleteEntry(entry);
>>> >>
>>> >>                return SUCCESS;
>>> >>        }
>>> >>
>>> >>        private JournalEntry entry;
>>> >>        private GoalToAchieve goalToAchieve;
>>> >>        private long id;
>>> >>
>>> >> ... + getters and setters
>>> >>
>>> >> I guess right now, my problem has become how to pass a parameter
>>> >> referring to en entry (the mark field) to the delete action. Next, I
>>> >> would do a lookup within the action to find the entry object and
>>> >> remove it from the parent object collection, by calling
>>> >> deleteEntry(JournalEntry entry)
>>> >>
>>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>>> >> wrote:
>>> >> > You are not providing enough information for anyone to help you. Since
>>> >> you
>>> >> > have changed your object and the jsp you had better include them with
>>> any
>>> >> > request.
>>> >> >
>>> >> >
>>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>>> >> > dimi.chr@gmail.com> wrote:
>>> >> >
>>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>>> >> >> field based
>>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>>> >> >> parameter.
>>> >> >>
>>> >> >> For example, I am trying to add it as a url parameter below:
>>> >> >>
>>> >> >> <a href="<s:url action='UpdateEntryForm'>
>>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>> >> >> <s:param name="mark" value="%{mark}" />
>>> >> >> </s:url>
>>> >> >>  ">Edit</a>
>>> >> >>
>>> >> >> But, the only param passed is the fullName. The mark is not added to
>>> >> >> the url string. I think this is because the only object available on
>>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>>> >> >> reference as deep as the "entries" collection. But not to fields of
>>> >> >> each entry object. In other words, the display or iterator help me
>>> >> >> view the collection objects, but not extract and use any of their
>>> >> >> fields... I am not sure why this is happening, or if I am doing
>>> >> >> something wrong.
>>> >> >>
>>> >> >
>>> >>
>>> >> ---------------------------------------------------------------------
>>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> >> For additional commands, e-mail: user-help@struts.apache.org
>>> >>
>>> >>
>>> >
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>



-- 
"Hey you! Would you help me to carry the stone?" Pink Floyd

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Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Yes, that is exactly the case, hmm.. Although, how is the
display:table tag finds the collection in the first place?

Supposedly the display has some way of reaching the valuestack, it can
even resolve the deeper notation <display:table
name="goalToAchieve.entries"

However, I will switch back to s:iterator to test if the syntax
suggested will work. I mainly used the display tag as a quick way to
sort the collection, but if I can't access the properties of the
objects I am iterating over, it isn't of much use in this case

On Mon, Jul 13, 2009 at 12:20 PM, Greg Lindholm<gr...@gmail.com> wrote:
> OK, I see the problem now...  you are not using <s:iterator> to go thru the
> entries, you are using <display:table>.
>
> The syntax suggested will not work since <display:table> does not know
> anything about the value stack.The <s:param name="mark" value="%{mark}" />
> uses the value stack to resolve 'mark' which will not work here, you will
> need to replace %{mark} with the right syntax to work with <display:table>
> iterator.
>
> And I don't know anything about <display:table> so you will need to look up
> how to access the properties of the entities you are iterating over so as to
> build the URL.
>
>
> On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
> dimi.chr@gmail.com> wrote:
>
>> I made the changes, but the view source indicates that the param
>> "mark" is not passed.
>>
>> The url linked is formed like this:
>>
>> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>>
>> The name and id params are fields of the parent object, the one
>> containing the collection.
>>
>> Actually, I tried with all fields taken from the collection object,
>> like entry, and date but none gets passed as a param. Only properties
>> exposed by the parent object, goalToAchieve are passed, shouldn't I be
>> able to point to a field within a collection object too?
>>
>> It looks like individual collection object properties can be viewed
>> using the iterator/display, but cannot be "captured" or passed as
>> parameters for any other uses... unless I am missing something, or
>> doing something wrong.
>>
>>
>> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
>> wrote:
>> > Looks like you need to change entry.mark to just mark and remove the
>> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
>> > the name and id of the parent object.
>> >
>> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>> >       <s:param name="id" value="%{goalToAchieve.id}" />
>> >       <s:param name="mark" value="%{mark}" />
>> >   </s:url>
>> > ">Remove</a>
>> >
>> >
>> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
>> > dimi.chr@gmail.com> wrote:
>> >
>> >> Thanks for letting me know. Alright, so:
>> >>
>> >> This is the parent class:
>> >>
>> >> @Entity
>> >> public class GoalToAchieve {
>> >> @Id @GeneratedValue
>> >> private Long id;
>> >>
>> >> @org.hibernate.annotations.CollectionOfElements
>> >> @JoinTable (name="GoalToAchieve_entry",
>> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>> >>
>> >>        public Set<JournalEntry> getEntries() {
>> >>                return entries;
>> >>        }
>> >>        public void setEntries(SortedSet<JournalEntry> entries) {
>> >>                this.entries = entries;
>> >>        }
>> >>
>> >>        public void addEntry(JournalEntry newEntry){
>> >>                entries.add(newEntry);
>> >>        }
>> >>
>> >>        public void deleteEntry(JournalEntry entry){
>> >>                entries.remove(entry);
>> >>        }
>> >> ..plus some other standard fields with getters and setters
>> >>
>> >> This is the child-class:
>> >>
>> >> @Embeddable
>> >> public class JournalEntry {
>> >> @org.hibernate.annotations.Parent
>> >> private GoalToAchieve goalToAchieve;
>> >>
>> >> @Column
>> >> private Long mark;
>> >> public Long getMark() {
>> >>        return mark;
>> >> }
>> >> public void setMark(long mark){
>> >>        this.mark = mark;
>> >>         }
>> >>
>> >> @Column(length = 255, nullable = false)
>> >> private String entry;
>> >>
>> >> @Temporal(TemporalType.TIMESTAMP)
>> >> @Column(nullable = false, updatable = false)
>> >> private Date insertDate = new Date();
>> >>
>> >> ..plus the rest getters and setters
>> >>
>> >> And this this the jsp part where I display the collection:
>> >>
>> >> <s:if test="goalToAchieve.entries.size > 0">
>> >> <display:table name="goalToAchieve.entries" requestURI=""
>> uid="thisGoal">
>> >>        <display:column property="entry" />
>> >>        <display:column property="date" sortable="true"
>> >> defaultorder="ascending" title="TimeStamp"/>
>> >>        <display:column property="mark" />
>> >>  <display:column>
>> >> <a href="<s:url action='UpdateEntryForm'>
>> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> >>        <s:param name="mark" value="#mark" />
>> >>    </s:url>
>> >>    ">Edit</a>
>> >> </display:column>
>> >> <display:column>
>> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> >>         <s:param name="id" value="%{goalToAchieve.id}" />
>> >>        <s:param name="mark" value="entry.mark" />
>> >>        <s:property value="%{entry}"/>
>> >>    </s:url>
>> >> ">Remove</a>
>> >> </display:column>
>> >> </display:table>
>> >> </s:if>
>> >>
>> >> ..and the delete action, which should take an entry reference and
>> >> remove it from the collections looks like this:
>> >>
>> >> public class DeleteEntry extends ActionSupport{
>> >> public String execute(){
>> >>                goalToAchieve.deleteEntry(entry);
>> >>
>> >>                return SUCCESS;
>> >>        }
>> >>
>> >>        private JournalEntry entry;
>> >>        private GoalToAchieve goalToAchieve;
>> >>        private long id;
>> >>
>> >> ... + getters and setters
>> >>
>> >> I guess right now, my problem has become how to pass a parameter
>> >> referring to en entry (the mark field) to the delete action. Next, I
>> >> would do a lookup within the action to find the entry object and
>> >> remove it from the parent object collection, by calling
>> >> deleteEntry(JournalEntry entry)
>> >>
>> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>> >> wrote:
>> >> > You are not providing enough information for anyone to help you. Since
>> >> you
>> >> > have changed your object and the jsp you had better include them with
>> any
>> >> > request.
>> >> >
>> >> >
>> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>> >> > dimi.chr@gmail.com> wrote:
>> >> >
>> >> >> Yes, that is a great suggestion actually. What I did was to add a new
>> >> >> field based
>> >> >> System.currentTimeMillis(), but the problem is adding it as a url
>> >> >> parameter.
>> >> >>
>> >> >> For example, I am trying to add it as a url parameter below:
>> >> >>
>> >> >> <a href="<s:url action='UpdateEntryForm'>
>> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> >> >> <s:param name="mark" value="%{mark}" />
>> >> >> </s:url>
>> >> >>  ">Edit</a>
>> >> >>
>> >> >> But, the only param passed is the fullName. The mark is not added to
>> >> >> the url string. I think this is because the only object available on
>> >> >> the valuestack is goalToAchieve, and using deeper notation I can
>> >> >> reference as deep as the "entries" collection. But not to fields of
>> >> >> each entry object. In other words, the display or iterator help me
>> >> >> view the collection objects, but not extract and use any of their
>> >> >> fields... I am not sure why this is happening, or if I am doing
>> >> >> something wrong.
>> >> >>
>> >> >
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> >> For additional commands, e-mail: user-help@struts.apache.org
>> >>
>> >>
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>

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Re: updating or deleting a component from a collection through display tag

[Greg Lindholm <gr...@gmail.com>]

OK, I see the problem now...  you are not using <s:iterator> to go thru the
entries, you are using <display:table>.

The syntax suggested will not work since <display:table> does not know
anything about the value stack.The <s:param name="mark" value="%{mark}" />
uses the value stack to resolve 'mark' which will not work here, you will
need to replace %{mark} with the right syntax to work with <display:table>
iterator.

And I don't know anything about <display:table> so you will need to look up
how to access the properties of the entities you are iterating over so as to
build the URL.


On Mon, Jul 13, 2009 at 12:28 PM, Dimitrios Christodoulakis <
dimi.chr@gmail.com> wrote:

> I made the changes, but the view source indicates that the param
> "mark" is not passed.
>
> The url linked is formed like this:
>
> /secure/DeleteEntryForm.action?name=firstName+lastName&id=1
>
> The name and id params are fields of the parent object, the one
> containing the collection.
>
> Actually, I tried with all fields taken from the collection object,
> like entry, and date but none gets passed as a param. Only properties
> exposed by the parent object, goalToAchieve are passed, shouldn't I be
> able to point to a field within a collection object too?
>
> It looks like individual collection object properties can be viewed
> using the iterator/display, but cannot be "captured" or passed as
> parameters for any other uses... unless I am missing something, or
> doing something wrong.
>
>
> On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com>
> wrote:
> > Looks like you need to change entry.mark to just mark and remove the
> > <s:property value="%{entry}"/>. Also you probably don't need to pass both
> > the name and id of the parent object.
> >
> > <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
> >       <s:param name="id" value="%{goalToAchieve.id}" />
> >       <s:param name="mark" value="%{mark}" />
> >   </s:url>
> > ">Remove</a>
> >
> >
> > On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
> > dimi.chr@gmail.com> wrote:
> >
> >> Thanks for letting me know. Alright, so:
> >>
> >> This is the parent class:
> >>
> >> @Entity
> >> public class GoalToAchieve {
> >> @Id @GeneratedValue
> >> private Long id;
> >>
> >> @org.hibernate.annotations.CollectionOfElements
> >> @JoinTable (name="GoalToAchieve_entry",
> >> joinColumns=@JoinColumn(name="goalToAchieve_id"))
> >> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
> >>
> >>        public Set<JournalEntry> getEntries() {
> >>                return entries;
> >>        }
> >>        public void setEntries(SortedSet<JournalEntry> entries) {
> >>                this.entries = entries;
> >>        }
> >>
> >>        public void addEntry(JournalEntry newEntry){
> >>                entries.add(newEntry);
> >>        }
> >>
> >>        public void deleteEntry(JournalEntry entry){
> >>                entries.remove(entry);
> >>        }
> >> ..plus some other standard fields with getters and setters
> >>
> >> This is the child-class:
> >>
> >> @Embeddable
> >> public class JournalEntry {
> >> @org.hibernate.annotations.Parent
> >> private GoalToAchieve goalToAchieve;
> >>
> >> @Column
> >> private Long mark;
> >> public Long getMark() {
> >>        return mark;
> >> }
> >> public void setMark(long mark){
> >>        this.mark = mark;
> >>         }
> >>
> >> @Column(length = 255, nullable = false)
> >> private String entry;
> >>
> >> @Temporal(TemporalType.TIMESTAMP)
> >> @Column(nullable = false, updatable = false)
> >> private Date insertDate = new Date();
> >>
> >> ..plus the rest getters and setters
> >>
> >> And this this the jsp part where I display the collection:
> >>
> >> <s:if test="goalToAchieve.entries.size > 0">
> >> <display:table name="goalToAchieve.entries" requestURI=""
> uid="thisGoal">
> >>        <display:column property="entry" />
> >>        <display:column property="date" sortable="true"
> >> defaultorder="ascending" title="TimeStamp"/>
> >>        <display:column property="mark" />
> >>  <display:column>
> >> <a href="<s:url action='UpdateEntryForm'>
> >>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> >>        <s:param name="mark" value="#mark" />
> >>    </s:url>
> >>    ">Edit</a>
> >> </display:column>
> >> <display:column>
> >> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
> >>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> >>         <s:param name="id" value="%{goalToAchieve.id}" />
> >>        <s:param name="mark" value="entry.mark" />
> >>        <s:property value="%{entry}"/>
> >>    </s:url>
> >> ">Remove</a>
> >> </display:column>
> >> </display:table>
> >> </s:if>
> >>
> >> ..and the delete action, which should take an entry reference and
> >> remove it from the collections looks like this:
> >>
> >> public class DeleteEntry extends ActionSupport{
> >> public String execute(){
> >>                goalToAchieve.deleteEntry(entry);
> >>
> >>                return SUCCESS;
> >>        }
> >>
> >>        private JournalEntry entry;
> >>        private GoalToAchieve goalToAchieve;
> >>        private long id;
> >>
> >> ... + getters and setters
> >>
> >> I guess right now, my problem has become how to pass a parameter
> >> referring to en entry (the mark field) to the delete action. Next, I
> >> would do a lookup within the action to find the entry object and
> >> remove it from the parent object collection, by calling
> >> deleteEntry(JournalEntry entry)
> >>
> >> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
> >> wrote:
> >> > You are not providing enough information for anyone to help you. Since
> >> you
> >> > have changed your object and the jsp you had better include them with
> any
> >> > request.
> >> >
> >> >
> >> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
> >> > dimi.chr@gmail.com> wrote:
> >> >
> >> >> Yes, that is a great suggestion actually. What I did was to add a new
> >> >> field based
> >> >> System.currentTimeMillis(), but the problem is adding it as a url
> >> >> parameter.
> >> >>
> >> >> For example, I am trying to add it as a url parameter below:
> >> >>
> >> >> <a href="<s:url action='UpdateEntryForm'>
> >> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> >> >> <s:param name="mark" value="%{mark}" />
> >> >> </s:url>
> >> >>  ">Edit</a>
> >> >>
> >> >> But, the only param passed is the fullName. The mark is not added to
> >> >> the url string. I think this is because the only object available on
> >> >> the valuestack is goalToAchieve, and using deeper notation I can
> >> >> reference as deep as the "entries" collection. But not to fields of
> >> >> each entry object. In other words, the display or iterator help me
> >> >> view the collection objects, but not extract and use any of their
> >> >> fields... I am not sure why this is happening, or if I am doing
> >> >> something wrong.
> >> >>
> >> >
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> >> For additional commands, e-mail: user-help@struts.apache.org
> >>
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>

Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

I made the changes, but the view source indicates that the param
"mark" is not passed.

The url linked is formed like this:

/secure/DeleteEntryForm.action?name=firstName+lastName&id=1

The name and id params are fields of the parent object, the one
containing the collection.

Actually, I tried with all fields taken from the collection object,
like entry, and date but none gets passed as a param. Only properties
exposed by the parent object, goalToAchieve are passed, shouldn't I be
able to point to a field within a collection object too?

It looks like individual collection object properties can be viewed
using the iterator/display, but cannot be "captured" or passed as
parameters for any other uses... unless I am missing something, or
doing something wrong.


On Mon, Jul 13, 2009 at 10:50 AM, Greg Lindholm<gr...@gmail.com> wrote:
> Looks like you need to change entry.mark to just mark and remove the
> <s:property value="%{entry}"/>. Also you probably don't need to pass both
> the name and id of the parent object.
>
> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>       <s:param name="id" value="%{goalToAchieve.id}" />
>       <s:param name="mark" value="%{mark}" />
>   </s:url>
> ">Remove</a>
>
>
> On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
> dimi.chr@gmail.com> wrote:
>
>> Thanks for letting me know. Alright, so:
>>
>> This is the parent class:
>>
>> @Entity
>> public class GoalToAchieve {
>> @Id @GeneratedValue
>> private Long id;
>>
>> @org.hibernate.annotations.CollectionOfElements
>> @JoinTable (name="GoalToAchieve_entry",
>> joinColumns=@JoinColumn(name="goalToAchieve_id"))
>> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>>
>>        public Set<JournalEntry> getEntries() {
>>                return entries;
>>        }
>>        public void setEntries(SortedSet<JournalEntry> entries) {
>>                this.entries = entries;
>>        }
>>
>>        public void addEntry(JournalEntry newEntry){
>>                entries.add(newEntry);
>>        }
>>
>>        public void deleteEntry(JournalEntry entry){
>>                entries.remove(entry);
>>        }
>> ..plus some other standard fields with getters and setters
>>
>> This is the child-class:
>>
>> @Embeddable
>> public class JournalEntry {
>> @org.hibernate.annotations.Parent
>> private GoalToAchieve goalToAchieve;
>>
>> @Column
>> private Long mark;
>> public Long getMark() {
>>        return mark;
>> }
>> public void setMark(long mark){
>>        this.mark = mark;
>>         }
>>
>> @Column(length = 255, nullable = false)
>> private String entry;
>>
>> @Temporal(TemporalType.TIMESTAMP)
>> @Column(nullable = false, updatable = false)
>> private Date insertDate = new Date();
>>
>> ..plus the rest getters and setters
>>
>> And this this the jsp part where I display the collection:
>>
>> <s:if test="goalToAchieve.entries.size > 0">
>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>        <display:column property="entry" />
>>        <display:column property="date" sortable="true"
>> defaultorder="ascending" title="TimeStamp"/>
>>        <display:column property="mark" />
>>  <display:column>
>> <a href="<s:url action='UpdateEntryForm'>
>>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>        <s:param name="mark" value="#mark" />
>>    </s:url>
>>    ">Edit</a>
>> </display:column>
>> <display:column>
>> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>>         <s:param name="id" value="%{goalToAchieve.id}" />
>>        <s:param name="mark" value="entry.mark" />
>>        <s:property value="%{entry}"/>
>>    </s:url>
>> ">Remove</a>
>> </display:column>
>> </display:table>
>> </s:if>
>>
>> ..and the delete action, which should take an entry reference and
>> remove it from the collections looks like this:
>>
>> public class DeleteEntry extends ActionSupport{
>> public String execute(){
>>                goalToAchieve.deleteEntry(entry);
>>
>>                return SUCCESS;
>>        }
>>
>>        private JournalEntry entry;
>>        private GoalToAchieve goalToAchieve;
>>        private long id;
>>
>> ... + getters and setters
>>
>> I guess right now, my problem has become how to pass a parameter
>> referring to en entry (the mark field) to the delete action. Next, I
>> would do a lookup within the action to find the entry object and
>> remove it from the parent object collection, by calling
>> deleteEntry(JournalEntry entry)
>>
>> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
>> wrote:
>> > You are not providing enough information for anyone to help you. Since
>> you
>> > have changed your object and the jsp you had better include them with any
>> > request.
>> >
>> >
>> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
>> > dimi.chr@gmail.com> wrote:
>> >
>> >> Yes, that is a great suggestion actually. What I did was to add a new
>> >> field based
>> >> System.currentTimeMillis(), but the problem is adding it as a url
>> >> parameter.
>> >>
>> >> For example, I am trying to add it as a url parameter below:
>> >>
>> >> <a href="<s:url action='UpdateEntryForm'>
>> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> >> <s:param name="mark" value="%{mark}" />
>> >> </s:url>
>> >>  ">Edit</a>
>> >>
>> >> But, the only param passed is the fullName. The mark is not added to
>> >> the url string. I think this is because the only object available on
>> >> the valuestack is goalToAchieve, and using deeper notation I can
>> >> reference as deep as the "entries" collection. But not to fields of
>> >> each entry object. In other words, the display or iterator help me
>> >> view the collection objects, but not extract and use any of their
>> >> fields... I am not sure why this is happening, or if I am doing
>> >> something wrong.
>> >>
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>

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Re: updating or deleting a component from a collection through display tag

[Greg Lindholm <gr...@gmail.com>]

Looks like you need to change entry.mark to just mark and remove the
<s:property value="%{entry}"/>. Also you probably don't need to pass both
the name and id of the parent object.

<a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
       <s:param name="id" value="%{goalToAchieve.id}" />
       <s:param name="mark" value="%{mark}" />
   </s:url>
">Remove</a>


On Mon, Jul 13, 2009 at 10:48 AM, Dimitrios Christodoulakis <
dimi.chr@gmail.com> wrote:

> Thanks for letting me know. Alright, so:
>
> This is the parent class:
>
> @Entity
> public class GoalToAchieve {
> @Id @GeneratedValue
> private Long id;
>
> @org.hibernate.annotations.CollectionOfElements
> @JoinTable (name="GoalToAchieve_entry",
> joinColumns=@JoinColumn(name="goalToAchieve_id"))
> private Set<JournalEntry> entries = new HashSet<JournalEntry>();
>
>        public Set<JournalEntry> getEntries() {
>                return entries;
>        }
>        public void setEntries(SortedSet<JournalEntry> entries) {
>                this.entries = entries;
>        }
>
>        public void addEntry(JournalEntry newEntry){
>                entries.add(newEntry);
>        }
>
>        public void deleteEntry(JournalEntry entry){
>                entries.remove(entry);
>        }
> ..plus some other standard fields with getters and setters
>
> This is the child-class:
>
> @Embeddable
> public class JournalEntry {
> @org.hibernate.annotations.Parent
> private GoalToAchieve goalToAchieve;
>
> @Column
> private Long mark;
> public Long getMark() {
>        return mark;
> }
> public void setMark(long mark){
>        this.mark = mark;
>         }
>
> @Column(length = 255, nullable = false)
> private String entry;
>
> @Temporal(TemporalType.TIMESTAMP)
> @Column(nullable = false, updatable = false)
> private Date insertDate = new Date();
>
> ..plus the rest getters and setters
>
> And this this the jsp part where I display the collection:
>
> <s:if test="goalToAchieve.entries.size > 0">
> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>        <display:column property="entry" />
>        <display:column property="date" sortable="true"
> defaultorder="ascending" title="TimeStamp"/>
>        <display:column property="mark" />
>  <display:column>
> <a href="<s:url action='UpdateEntryForm'>
>        <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>        <s:param name="mark" value="#mark" />
>    </s:url>
>    ">Edit</a>
> </display:column>
> <display:column>
> <a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
>         <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>         <s:param name="id" value="%{goalToAchieve.id}" />
>        <s:param name="mark" value="entry.mark" />
>        <s:property value="%{entry}"/>
>    </s:url>
> ">Remove</a>
> </display:column>
> </display:table>
> </s:if>
>
> ..and the delete action, which should take an entry reference and
> remove it from the collections looks like this:
>
> public class DeleteEntry extends ActionSupport{
> public String execute(){
>                goalToAchieve.deleteEntry(entry);
>
>                return SUCCESS;
>        }
>
>        private JournalEntry entry;
>        private GoalToAchieve goalToAchieve;
>        private long id;
>
> ... + getters and setters
>
> I guess right now, my problem has become how to pass a parameter
> referring to en entry (the mark field) to the delete action. Next, I
> would do a lookup within the action to find the entry object and
> remove it from the parent object collection, by calling
> deleteEntry(JournalEntry entry)
>
> On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com>
> wrote:
> > You are not providing enough information for anyone to help you. Since
> you
> > have changed your object and the jsp you had better include them with any
> > request.
> >
> >
> > On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
> > dimi.chr@gmail.com> wrote:
> >
> >> Yes, that is a great suggestion actually. What I did was to add a new
> >> field based
> >> System.currentTimeMillis(), but the problem is adding it as a url
> >> parameter.
> >>
> >> For example, I am trying to add it as a url parameter below:
> >>
> >> <a href="<s:url action='UpdateEntryForm'>
> >> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> >> <s:param name="mark" value="%{mark}" />
> >> </s:url>
> >>  ">Edit</a>
> >>
> >> But, the only param passed is the fullName. The mark is not added to
> >> the url string. I think this is because the only object available on
> >> the valuestack is goalToAchieve, and using deeper notation I can
> >> reference as deep as the "entries" collection. But not to fields of
> >> each entry object. In other words, the display or iterator help me
> >> view the collection objects, but not extract and use any of their
> >> fields... I am not sure why this is happening, or if I am doing
> >> something wrong.
> >>
> >
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>

Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Thanks for letting me know. Alright, so:

This is the parent class:

@Entity
public class GoalToAchieve {
@Id @GeneratedValue
private Long id;
	
@org.hibernate.annotations.CollectionOfElements
@JoinTable (name="GoalToAchieve_entry",
joinColumns=@JoinColumn(name="goalToAchieve_id"))
private Set<JournalEntry> entries = new HashSet<JournalEntry>();
	
	public Set<JournalEntry> getEntries() {
		return entries;
	}
	public void setEntries(SortedSet<JournalEntry> entries) {
		this.entries = entries;
	}
	
	public void addEntry(JournalEntry newEntry){
		entries.add(newEntry);
	}
	
	public void deleteEntry(JournalEntry entry){
		entries.remove(entry);
	}
..plus some other standard fields with getters and setters

This is the child-class:

@Embeddable
public class JournalEntry {
@org.hibernate.annotations.Parent
private GoalToAchieve goalToAchieve;
	
@Column
private Long mark;
public Long getMark() {
	return mark;
}
public void setMark(long mark){
	this.mark = mark;
	}
	
@Column(length = 255, nullable = false)
private String entry;
	
@Temporal(TemporalType.TIMESTAMP)
@Column(nullable = false, updatable = false)
private Date insertDate = new Date();

..plus the rest getters and setters

And this this the jsp part where I display the collection:

<s:if test="goalToAchieve.entries.size > 0">
<display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
    	<display:column property="entry" />
    	<display:column property="date" sortable="true"
defaultorder="ascending" title="TimeStamp"/>
	<display:column property="mark" />
  <display:column>
<a href="<s:url action='UpdateEntryForm'>
    	<s:param name="name" value="%{goalToAchieve.owner.fullName}" />
    	<s:param name="mark" value="#mark" />
    </s:url>
    ">Edit</a>
</display:column>
<display:column>
<a href="<s:url action='DeleteEntryForm' var="entry" escapeAmp="false">
	<s:param name="name" value="%{goalToAchieve.owner.fullName}" />
	<s:param name="id" value="%{goalToAchieve.id}" />
	<s:param name="mark" value="entry.mark" />
	<s:property value="%{entry}"/>
    </s:url>
">Remove</a>	
</display:column>
</display:table>
</s:if>

..and the delete action, which should take an entry reference and
remove it from the collections looks like this:

public class DeleteEntry extends ActionSupport{
public String execute(){
		goalToAchieve.deleteEntry(entry);
		
		return SUCCESS;
	}
	
	private JournalEntry entry;
	private GoalToAchieve goalToAchieve;
	private long id;

... + getters and setters

I guess right now, my problem has become how to pass a parameter
referring to en entry (the mark field) to the delete action. Next, I
would do a lookup within the action to find the entry object and
remove it from the parent object collection, by calling
deleteEntry(JournalEntry entry)

On Mon, Jul 13, 2009 at 9:16 AM, Greg Lindholm<gr...@gmail.com> wrote:
> You are not providing enough information for anyone to help you. Since you
> have changed your object and the jsp you had better include them with any
> request.
>
>
> On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
> dimi.chr@gmail.com> wrote:
>
>> Yes, that is a great suggestion actually. What I did was to add a new
>> field based
>> System.currentTimeMillis(), but the problem is adding it as a url
>> parameter.
>>
>> For example, I am trying to add it as a url parameter below:
>>
>> <a href="<s:url action='UpdateEntryForm'>
>> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> <s:param name="mark" value="%{mark}" />
>> </s:url>
>>  ">Edit</a>
>>
>> But, the only param passed is the fullName. The mark is not added to
>> the url string. I think this is because the only object available on
>> the valuestack is goalToAchieve, and using deeper notation I can
>> reference as deep as the "entries" collection. But not to fields of
>> each entry object. In other words, the display or iterator help me
>> view the collection objects, but not extract and use any of their
>> fields... I am not sure why this is happening, or if I am doing
>> something wrong.
>>
>

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Re: updating or deleting a component from a collection through display tag

[Greg Lindholm <gr...@gmail.com>]

You are not providing enough information for anyone to help you. Since you
have changed your object and the jsp you had better include them with any
request.


On Mon, Jul 13, 2009 at 9:51 AM, Dimitrios Christodoulakis <
dimi.chr@gmail.com> wrote:

> Yes, that is a great suggestion actually. What I did was to add a new
> field based
> System.currentTimeMillis(), but the problem is adding it as a url
> parameter.
>
> For example, I am trying to add it as a url parameter below:
>
> <a href="<s:url action='UpdateEntryForm'>
> <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> <s:param name="mark" value="%{mark}" />
> </s:url>
>  ">Edit</a>
>
> But, the only param passed is the fullName. The mark is not added to
> the url string. I think this is because the only object available on
> the valuestack is goalToAchieve, and using deeper notation I can
> reference as deep as the "entries" collection. But not to fields of
> each entry object. In other words, the display or iterator help me
> view the collection objects, but not extract and use any of their
> fields... I am not sure why this is happening, or if I am doing
> something wrong.
>

Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Yes, that is a great suggestion actually. What I did was to add a new
field based
System.currentTimeMillis(), but the problem is adding it as a url parameter.

For example, I am trying to add it as a url parameter below:

<a href="<s:url action='UpdateEntryForm'>
<s:param name="name" value="%{goalToAchieve.owner.fullName}" />
<s:param name="mark" value="%{mark}" />
</s:url>
 ">Edit</a>

But, the only param passed is the fullName. The mark is not added to
the url string. I think this is because the only object available on
the valuestack is goalToAchieve, and using deeper notation I can
reference as deep as the "entries" collection. But not to fields of
each entry object. In other words, the display or iterator help me
view the collection objects, but not extract and use any of their
fields... I am not sure why this is happening, or if I am doing
something wrong.

On Mon, Jul 13, 2009 at 8:43 AM, Greg Lindholm<gr...@gmail.com> wrote:
>>
>> Thanks for the reply. Well, entry is an instance of a separate class:
>>
>> @Embeddable
>> public class JournalEntry {
>> @org.hibernate.annotations.Parent
>>        private GoalToAchieve goalToAchieve;
>> @Column(length = 255, nullable = false)
>>        private String entry;
>>
>>        @Temporal(TemporalType.TIMESTAMP)
>>        @Column(nullable = false, updatable = false)
>>        private Date insertDate = new Date();
>>
>> ...plus the getters and setters
>>
>> This being a value type embeddable component, it is represented with a
>> table with only a foreign key to the parent entity it belongs to:
>> goalToAchieve_id
>>
>> So, if I pass the entry String as a parameter (I am not sure if it
>> would be convenient to have a a few sentences as url params), how can
>> I turn it into a reference to the object I want to actually remove
>> from the collection?
>>
>> Thanks again
>>
>> > You didn't say what 'entry' is, but if it is a String or some primitive
>> you
>> > can just pass it as another parameter.
>> >
>> > <s:url action='DeleteEntryForm'>
>> >          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> >           <s:param name="entry" value="%{entry}" />
>> > </s:url>
>> >
>> > Usually, every database entity object has an 'id' property (primary key)
>> and
>> > you would just pass the id as a parameter so your action can find the
>> object
>> > in the database.
>> >
>> > In you browser do a view source on the page to ensure the url is being
>> > generated correctly with the params you are expecting.
>> >
>>
>
> You definitely do not want to pass 'entry' as a parameter on the url.
> Every database object needs some kind of unique key id just for situations
> like this.
> Maybe you could use the insertDate as a key (it's probably unique within
> this context) but it would be better to add a key, perhaps a sequence number
> so that goalToAchieve_id + seq is the PK.
>

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Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Thanks for the comments Martin, I will try it out!

On Mon, Jul 13, 2009 at 9:46 AM, Martin Gainty<mg...@hotmail.com> wrote:
>
> @Table(name = "TableNameGoesHere")
>
> //the java file would use ForeignKey annotation as described
> @org.hibernate.annotations.ForeignKey(name = "FK_GOALTOACHIEVE_ID")
>
> public class WikiDocument extends WikiFile<WikiDocument> implements Serializable {
>    public String getHistoricalEntityName() {
>        return "HistoricalWikiDocument";
>    }
>
> and the hibernate configuration file (DatabaseObjects.hbm.xml) would handle the SequenceGeneration
>
> <hibernate-mapping package="org.jboss.seam.wiki.core.model" default-access="field">
>    <class name="WikiDocument" entity-name="HistoricalWikiDocument" table="TABLE_NAME_GOES_HERE" polymorphism="explicit">
>        <id name="PrimaryKey_In_Java_File" column="PRIMARY_KEY_ID">
>            <generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">
>                <param name="sequence_name">TABLE_NAME_PRIMARY_KEY__SEQUENCE</param>
>            </generator>
>        </id>
>
> WARNING: Despite (albeit brief) commentary offered
> any attempts to provide SEQUENCE generation to subvert SEQUENCE GENERATION by DBA is discouraged ..you do'nt want 2 sequences on same Table
> i would encourage you to coordinate your SEQUENCE generation activity with DBA
>
> fwiw
> Martin Gainty
> ______________________________________________
> Verzicht und Vertraulichkeitanmerkung
>
> Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene Empfaenger sein, so bitten wir hoeflich um eine Mitteilung. Jede unbefugte Weiterleitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht dient lediglich dem Austausch von Informationen und entfaltet keine rechtliche Bindungswirkung. Aufgrund der leichten Manipulierbarkeit von E-Mails koennen wir keine Haftung fuer den Inhalt uebernehmen.
>
>
>
>> Date: Mon, 13 Jul 2009 09:43:15 -0400
>> Subject: Re: updating or deleting a component from a collection through       display tag
>> From: greg.lindholm@gmail.com
>> To: user@struts.apache.org
>>
>> >
>> > Thanks for the reply. Well, entry is an instance of a separate class:
>> >
>> > @Embeddable
>> > public class JournalEntry {
>> > @org.hibernate.annotations.Parent
>> >        private GoalToAchieve goalToAchieve;
>> > @Column(length = 255, nullable = false)
>> >        private String entry;
>> >
>> >        @Temporal(TemporalType.TIMESTAMP)
>> >        @Column(nullable = false, updatable = false)
>> >        private Date insertDate = new Date();
>> >
>> > ...plus the getters and setters
>> >
>> > This being a value type embeddable component, it is represented with a
>> > table with only a foreign key to the parent entity it belongs to:
>> > goalToAchieve_id
>> >
>> > So, if I pass the entry String as a parameter (I am not sure if it
>> > would be convenient to have a a few sentences as url params), how can
>> > I turn it into a reference to the object I want to actually remove
>> > from the collection?
>> >
>> > Thanks again
>> >
>> > > You didn't say what 'entry' is, but if it is a String or some primitive
>> > you
>> > > can just pass it as another parameter.
>> > >
>> > > <s:url action='DeleteEntryForm'>
>> > >          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>> > >           <s:param name="entry" value="%{entry}" />
>> > > </s:url>
>> > >
>> > > Usually, every database entity object has an 'id' property (primary key)
>> > and
>> > > you would just pass the id as a parameter so your action can find the
>> > object
>> > > in the database.
>> > >
>> > > In you browser do a view source on the page to ensure the url is being
>> > > generated correctly with the params you are expecting.
>> > >
>> >
>>
>> You definitely do not want to pass 'entry' as a parameter on the url.
>> Every database object needs some kind of unique key id just for situations
>> like this.
>> Maybe you could use the insertDate as a key (it's probably unique within
>> this context) but it would be better to add a key, perhaps a sequence number
>> so that goalToAchieve_id + seq is the PK.
>
> _________________________________________________________________
> Lauren found her dream laptop. Find the PC that’s right for you.
> http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290

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RE: updating or deleting a component from a collection through display tag

[Martin Gainty <mg...@hotmail.com>]

@Table(name = "TableNameGoesHere")

//the java file would use ForeignKey annotation as described
@org.hibernate.annotations.ForeignKey(name = "FK_GOALTOACHIEVE_ID")

public class WikiDocument extends WikiFile<WikiDocument> implements Serializable {
    public String getHistoricalEntityName() {
        return "HistoricalWikiDocument";
    }

and the hibernate configuration file (DatabaseObjects.hbm.xml) would handle the SequenceGeneration

<hibernate-mapping package="org.jboss.seam.wiki.core.model" default-access="field">
    <class name="WikiDocument" entity-name="HistoricalWikiDocument" table="TABLE_NAME_GOES_HERE" polymorphism="explicit">
        <id name="PrimaryKey_In_Java_File" column="PRIMARY_KEY_ID">
            <generator class="org.hibernate.id.enhanced.SequenceStyleGenerator">
                <param name="sequence_name">TABLE_NAME_PRIMARY_KEY__SEQUENCE</param>
            </generator>
        </id>

WARNING: Despite (albeit brief) commentary offered 
any attempts to provide SEQUENCE generation to subvert SEQUENCE GENERATION by DBA is discouraged ..you do'nt want 2 sequences on same Table
i would encourage you to coordinate your SEQUENCE generation activity with DBA

fwiw
Martin Gainty 
______________________________________________ 
Verzicht und Vertraulichkeitanmerkung
 
Diese Nachricht ist vertraulich. Sollten Sie nicht der vorgesehene Empfaenger sein, so bitten wir hoeflich um eine Mitteilung. Jede unbefugte Weiterleitung oder Fertigung einer Kopie ist unzulaessig. Diese Nachricht dient lediglich dem Austausch von Informationen und entfaltet keine rechtliche Bindungswirkung. Aufgrund der leichten Manipulierbarkeit von E-Mails koennen wir keine Haftung fuer den Inhalt uebernehmen.



> Date: Mon, 13 Jul 2009 09:43:15 -0400
> Subject: Re: updating or deleting a component from a collection through 	display tag
> From: greg.lindholm@gmail.com
> To: user@struts.apache.org
> 
> >
> > Thanks for the reply. Well, entry is an instance of a separate class:
> >
> > @Embeddable
> > public class JournalEntry {
> > @org.hibernate.annotations.Parent
> >        private GoalToAchieve goalToAchieve;
> > @Column(length = 255, nullable = false)
> >        private String entry;
> >
> >        @Temporal(TemporalType.TIMESTAMP)
> >        @Column(nullable = false, updatable = false)
> >        private Date insertDate = new Date();
> >
> > ...plus the getters and setters
> >
> > This being a value type embeddable component, it is represented with a
> > table with only a foreign key to the parent entity it belongs to:
> > goalToAchieve_id
> >
> > So, if I pass the entry String as a parameter (I am not sure if it
> > would be convenient to have a a few sentences as url params), how can
> > I turn it into a reference to the object I want to actually remove
> > from the collection?
> >
> > Thanks again
> >
> > > You didn't say what 'entry' is, but if it is a String or some primitive
> > you
> > > can just pass it as another parameter.
> > >
> > > <s:url action='DeleteEntryForm'>
> > >          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> > >           <s:param name="entry" value="%{entry}" />
> > > </s:url>
> > >
> > > Usually, every database entity object has an 'id' property (primary key)
> > and
> > > you would just pass the id as a parameter so your action can find the
> > object
> > > in the database.
> > >
> > > In you browser do a view source on the page to ensure the url is being
> > > generated correctly with the params you are expecting.
> > >
> >
> 
> You definitely do not want to pass 'entry' as a parameter on the url.
> Every database object needs some kind of unique key id just for situations
> like this.
> Maybe you could use the insertDate as a key (it's probably unique within
> this context) but it would be better to add a key, perhaps a sequence number
> so that goalToAchieve_id + seq is the PK.

_________________________________________________________________
Lauren found her dream laptop. Find the PC that’s right for you.
http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290

Re: updating or deleting a component from a collection through display tag

[Greg Lindholm <gr...@gmail.com>]

>
> Thanks for the reply. Well, entry is an instance of a separate class:
>
> @Embeddable
> public class JournalEntry {
> @org.hibernate.annotations.Parent
>        private GoalToAchieve goalToAchieve;
> @Column(length = 255, nullable = false)
>        private String entry;
>
>        @Temporal(TemporalType.TIMESTAMP)
>        @Column(nullable = false, updatable = false)
>        private Date insertDate = new Date();
>
> ...plus the getters and setters
>
> This being a value type embeddable component, it is represented with a
> table with only a foreign key to the parent entity it belongs to:
> goalToAchieve_id
>
> So, if I pass the entry String as a parameter (I am not sure if it
> would be convenient to have a a few sentences as url params), how can
> I turn it into a reference to the object I want to actually remove
> from the collection?
>
> Thanks again
>
> > You didn't say what 'entry' is, but if it is a String or some primitive
> you
> > can just pass it as another parameter.
> >
> > <s:url action='DeleteEntryForm'>
> >          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
> >           <s:param name="entry" value="%{entry}" />
> > </s:url>
> >
> > Usually, every database entity object has an 'id' property (primary key)
> and
> > you would just pass the id as a parameter so your action can find the
> object
> > in the database.
> >
> > In you browser do a view source on the page to ensure the url is being
> > generated correctly with the params you are expecting.
> >
>

You definitely do not want to pass 'entry' as a parameter on the url.
Every database object needs some kind of unique key id just for situations
like this.
Maybe you could use the insertDate as a key (it's probably unique within
this context) but it would be better to add a key, perhaps a sequence number
so that goalToAchieve_id + seq is the PK.

Re: updating or deleting a component from a collection through display tag

[Dimitrios Christodoulakis <di...@gmail.com>]

Thanks for the reply. Well, entry is an instance of a separate class:

@Embeddable
public class JournalEntry {
@org.hibernate.annotations.Parent
	private GoalToAchieve goalToAchieve;
@Column(length = 255, nullable = false)
	private String entry;
	
	@Temporal(TemporalType.TIMESTAMP)
	@Column(nullable = false, updatable = false)
	private Date insertDate = new Date();

...plus the getters and setters

This being a value type embeddable component, it is represented with a
table with only a foreign key to the parent entity it belongs to:
goalToAchieve_id

So, if I pass the entry String as a parameter (I am not sure if it
would be convenient to have a a few sentences as url params), how can
I turn it into a reference to the object I want to actually remove
from the collection?

Thanks again

On Mon, Jul 13, 2009 at 8:17 AM, Greg Lindholm<gr...@gmail.com> wrote:
>>
>>
>> I have successfully used the display tag to iterate over a collection
>> which is exposed in an action class. On each row in addition to the
>> columns displaying the fields of each object in the collection, I
>> embed two more struts-tag urls: Update and Remove.
>>
>> The objective is to have an extra two columns for every row in the
>> table giving the ability to update or delete each record:
>>
>> <display:table name="goalToAchieve.entries" requestURI="" uid="thisGoal">
>>        <display:column property="entry" />
>>        <display:column property="date" sortable="true"
>> defaultorder="ascending" title="TimeStamp"/>
>>        <display:column><a href="<s:url action='UpdateEntryForm'>
>>                                <s:param name="name"
>> value="%{goalToAchieve.owner.fullName}" />
>>                        </s:url>
>>                        ">Edit</a></display:column>
>>        <display:column><a href="<s:url action='DeleteEntryForm'>
>>                                        <s:param name="name"
>> value="%{goalToAchieve.owner.fullName}" />
>>                                        <s:property value="%{entry}"/>
>>                                       </s:url>
>>                                       ">Remove</a></display:column>
>> </display:table>
>>
>> I am having trouble passing the entry property, (or reference to it)
>> to the url targeting the update or delete action. The entries
>> collection consists of value type, embeddable objects. I am aware of
>> how to pass parameters to the linking url, but my issue is passing a
>> reference to the "entry" property of each row, to the update or delete
>> action for the same row.
>>
>>
> You didn't say what 'entry' is, but if it is a String or some primitive you
> can just pass it as another parameter.
>
> <s:url action='DeleteEntryForm'>
>          <s:param name="name" value="%{goalToAchieve.owner.fullName}" />
>           <s:param name="entry" value="%{entry}" />
> </s:url>
>
> Usually, every database entity object has an 'id' property (primary key) and
> you would just pass the id as a parameter so your action can find the object
> in the database.
>
> In you browser do a view source on the page to ensure the url is being
> generated correctly with the params you are expecting.
>

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