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Posted to users@tapestry.apache.org by Joe123 --- <jp...@hotmail.com> on 2008/12/19 11:43:20 UTC
Select with @InjectSelectionModel problem (value passed in is null)
Hello
I use the select component with the @InjectSelectionModel annotation as described here:
http://wiki.apache.org/tapestry/Tapestry5AnotherSelectWithObjects
<select t:type="select" t:id="categorySelect" model="categoriesSelectionModel" encoder="categoriesValueEncoder" value="selectedCategory" />
The select is nicely loaded with categories. Next I submit the form and I notice that the setSelectedCategory method is called. But it prints "setSelectedCategory: null"
See below for some the corresponding java code. What am I doing wrong? Why is the selectedCategory null, after I have selected a category and submitted the form?
@InjectSelectionModel(labelField = "name", idField = "id")
@Property
private List<Category> categories = new ArrayList<Category>();
@Persist
private Category selectedCategory;
public void setSelectedCategory(Category selectedCategory) {
System.out.println("setSelectedCategory: " + selectedCategory);
this.selectedCategory = selectedCategory;
}
public Category getSelectedRootCategory() {
return selectedRootCategory;
}
_________________________________________________________________
More than messages–check out the rest of the Windows Live™.
http://www.microsoft.com/windows/windowslive/
Re: Select with @InjectSelectionModel problem (value passed in is null)
Posted by Marcelo Lotif <ml...@gmail.com>.
Great idea, it was corrected.
Thanks.
On Fri, Dec 19, 2008 at 10:17 AM, Joe123 --- <jp...@hotmail.com> wrote:
>
> Hi,
>
> Thanks for your answer. I forgot to add the
> public void onPrepare() and therefore the list was empty.
>
> Thanks.
>
> One addition for the tapestry wiki page.
>
> I think it is better to replace:
> String accessActualName = transformation.addField(Modifier.PRIVATE,
> "org.apache.tapestry5.ioc.services.PropertyAccess", "_access");
> into:
> String accessActualName = transformation.addField(Modifier.PRIVATE,
> PropertyAccess.class.getName(), "_access");
>
> So we use no hardcoded package names.
>
>
>
> > Joe,
> >
> > There were some errors on the wiki page and I've already corrected it,
> but
> > was nothing related with this problem.
> > I can't reproduce it here, can you show some more of your code so I can
> test
> > it here?
>
> > >
> > > I have been debugging and noticed that the failure is in the
> > > GenericValueEncoder.toValue method
> > > The idFieldAdapter property is null and therefore it can't find a
> match.
> > >
> > > And why is the idFieldAdapter null?
> > > Because in the constructor(see below), the list parameter was null
> after
> > > submitting the form.
> > > Do I need to persist my List of objects? I don't want this....
> > > And I think the example on the wiki doesn't work as well.
> > >
> > > Does anyone had this error earlier?
> > >
> > >
> > > public GenericValueEncoder(List<T> list, String idField, PropertyAccess
> > > access) {
> > > if (idField != null && !idField.equalsIgnoreCase("null")) {
> > > if (list.size() > 0) {
> > > this.idFieldAdapter =
> > > access.getAdapter(list.get(0).getClass()).getPropertyAdapter(idField);
> > > }
> > > }
> > > this.list = list;
> > > }
> > >
> > > > Hello
> > > >
> > > > I use the select component with the @InjectSelectionModel annotation
> as
> > > described here:
> > > > http://wiki.apache.org/tapestry/Tapestry5AnotherSelectWithObjects
> > > >
> > > > <select t:type="select" t:id="categorySelect"
> > > model="categoriesSelectionModel" encoder="categoriesValueEncoder"
> > > value="selectedCategory" />
> > > >
> > > > The select is nicely loaded with categories. Next I submit the form
> and I
> > > notice that the setSelectedCategory method is called. But it prints
> > > "setSelectedCategory: null"
> > > > See below for some the corresponding java code. What am I doing
> wrong?
> > > Why is the selectedCategory null, after I have selected a category and
> > > submitted the form?
> > > >
> > > > @InjectSelectionModel(labelField = "name", idField = "id")
> > > > @Property
> > > > private List<Category> categories = new ArrayList<Category>();
> > > >
> > > > @Persist
> > > > private Category selectedCategory;
> > > >
> > > > public void setSelectedCategory(Category selectedCategory) {
> > > >
> > > > System.out.println("setSelectedCategory: " + selectedCategory);
> > > >
> > > > this.selectedCategory = selectedCategory;
> > > >
> > > > }
> > > >
> > > > public Category getSelectedRootCategory() {
> > > > return selectedRootCategory;
> > > > }
> > > >
> > > >
> > > >
> > > > _________________________________________________________________
> > > > More than messages–check out the rest of the Windows Live™.
> > > > http://www.microsoft.com/windows/windowslive/
> > >
> > > _________________________________________________________________
> > > Show them the way! Add maps and directions to your party invites.
> > > http://www.microsoft.com/windows/windowslive/events.aspx
> >
> >
> >
> >
> > --
> > Atenciosamente,
> >
> > Marcelo Lotif
> > Programador Java e Tapestry
> > FIEC - Federação das Indústrias do Estado do Ceará
> > (85) 3421-5910
>
> _________________________________________________________________
> Drag n' drop—Get easy photo sharing with Windows Live™ Photos.
>
> http://www.microsoft.com/windows/windowslive/photos.aspx
--
Atenciosamente,
Marcelo Lotif
Programador Java e Tapestry
FIEC - Federação das Indústrias do Estado do Ceará
(85) 3421-5910
RE: Select with @InjectSelectionModel problem (value passed in is
null)
Posted by Joe123 --- <jp...@hotmail.com>.
Hi,
Thanks for your answer. I forgot to add the
public void onPrepare() and therefore the list was empty.
Thanks.
One addition for the tapestry wiki page.
I think it is better to replace:
String accessActualName = transformation.addField(Modifier.PRIVATE, "org.apache.tapestry5.ioc.services.PropertyAccess", "_access");
into:
String accessActualName = transformation.addField(Modifier.PRIVATE, PropertyAccess.class.getName(), "_access");
So we use no hardcoded package names.
> Joe,
>
> There were some errors on the wiki page and I've already corrected it, but
> was nothing related with this problem.
> I can't reproduce it here, can you show some more of your code so I can test
> it here?
> >
> > I have been debugging and noticed that the failure is in the
> > GenericValueEncoder.toValue method
> > The idFieldAdapter property is null and therefore it can't find a match.
> >
> > And why is the idFieldAdapter null?
> > Because in the constructor(see below), the list parameter was null after
> > submitting the form.
> > Do I need to persist my List of objects? I don't want this....
> > And I think the example on the wiki doesn't work as well.
> >
> > Does anyone had this error earlier?
> >
> >
> > public GenericValueEncoder(List<T> list, String idField, PropertyAccess
> > access) {
> > if (idField != null && !idField.equalsIgnoreCase("null")) {
> > if (list.size() > 0) {
> > this.idFieldAdapter =
> > access.getAdapter(list.get(0).getClass()).getPropertyAdapter(idField);
> > }
> > }
> > this.list = list;
> > }
> >
> > > Hello
> > >
> > > I use the select component with the @InjectSelectionModel annotation as
> > described here:
> > > http://wiki.apache.org/tapestry/Tapestry5AnotherSelectWithObjects
> > >
> > > <select t:type="select" t:id="categorySelect"
> > model="categoriesSelectionModel" encoder="categoriesValueEncoder"
> > value="selectedCategory" />
> > >
> > > The select is nicely loaded with categories. Next I submit the form and I
> > notice that the setSelectedCategory method is called. But it prints
> > "setSelectedCategory: null"
> > > See below for some the corresponding java code. What am I doing wrong?
> > Why is the selectedCategory null, after I have selected a category and
> > submitted the form?
> > >
> > > @InjectSelectionModel(labelField = "name", idField = "id")
> > > @Property
> > > private List<Category> categories = new ArrayList<Category>();
> > >
> > > @Persist
> > > private Category selectedCategory;
> > >
> > > public void setSelectedCategory(Category selectedCategory) {
> > >
> > > System.out.println("setSelectedCategory: " + selectedCategory);
> > >
> > > this.selectedCategory = selectedCategory;
> > >
> > > }
> > >
> > > public Category getSelectedRootCategory() {
> > > return selectedRootCategory;
> > > }
> > >
> > >
> > >
> > > _________________________________________________________________
> > > More than messages–check out the rest of the Windows Live™.
> > > http://www.microsoft.com/windows/windowslive/
> >
> > _________________________________________________________________
> > Show them the way! Add maps and directions to your party invites.
> > http://www.microsoft.com/windows/windowslive/events.aspx
>
>
>
>
> --
> Atenciosamente,
>
> Marcelo Lotif
> Programador Java e Tapestry
> FIEC - Federação das Indústrias do Estado do Ceará
> (85) 3421-5910
_________________________________________________________________
Drag n’ drop—Get easy photo sharing with Windows Live™ Photos.
http://www.microsoft.com/windows/windowslive/photos.aspx
Re: Select with @InjectSelectionModel problem (value passed in is null)
Posted by Marcelo Lotif <ml...@gmail.com>.
Joe,
There were some errors on the wiki page and I've already corrected it, but
was nothing related with this problem.
I can't reproduce it here, can you show some more of your code so I can test
it here?
On Fri, Dec 19, 2008 at 8:32 AM, Joe123 --- <jp...@hotmail.com> wrote:
>
> I have been debugging and noticed that the failure is in the
> GenericValueEncoder.toValue method
> The idFieldAdapter property is null and therefore it can't find a match.
>
> And why is the idFieldAdapter null?
> Because in the constructor(see below), the list parameter was null after
> submitting the form.
> Do I need to persist my List of objects? I don't want this....
> And I think the example on the wiki doesn't work as well.
>
> Does anyone had this error earlier?
>
>
> public GenericValueEncoder(List<T> list, String idField, PropertyAccess
> access) {
> if (idField != null && !idField.equalsIgnoreCase("null")) {
> if (list.size() > 0) {
> this.idFieldAdapter =
> access.getAdapter(list.get(0).getClass()).getPropertyAdapter(idField);
> }
> }
> this.list = list;
> }
>
> > Hello
> >
> > I use the select component with the @InjectSelectionModel annotation as
> described here:
> > http://wiki.apache.org/tapestry/Tapestry5AnotherSelectWithObjects
> >
> > <select t:type="select" t:id="categorySelect"
> model="categoriesSelectionModel" encoder="categoriesValueEncoder"
> value="selectedCategory" />
> >
> > The select is nicely loaded with categories. Next I submit the form and I
> notice that the setSelectedCategory method is called. But it prints
> "setSelectedCategory: null"
> > See below for some the corresponding java code. What am I doing wrong?
> Why is the selectedCategory null, after I have selected a category and
> submitted the form?
> >
> > @InjectSelectionModel(labelField = "name", idField = "id")
> > @Property
> > private List<Category> categories = new ArrayList<Category>();
> >
> > @Persist
> > private Category selectedCategory;
> >
> > public void setSelectedCategory(Category selectedCategory) {
> >
> > System.out.println("setSelectedCategory: " + selectedCategory);
> >
> > this.selectedCategory = selectedCategory;
> >
> > }
> >
> > public Category getSelectedRootCategory() {
> > return selectedRootCategory;
> > }
> >
> >
> >
> > _________________________________________________________________
> > More than messages–check out the rest of the Windows Live™.
> > http://www.microsoft.com/windows/windowslive/
>
> _________________________________________________________________
> Show them the way! Add maps and directions to your party invites.
> http://www.microsoft.com/windows/windowslive/events.aspx
--
Atenciosamente,
Marcelo Lotif
Programador Java e Tapestry
FIEC - Federação das Indústrias do Estado do Ceará
(85) 3421-5910
RE: Select with @InjectSelectionModel problem (value passed in is
null)
Posted by Joe123 --- <jp...@hotmail.com>.
I have been debugging and noticed that the failure is in the GenericValueEncoder.toValue method
The idFieldAdapter property is null and therefore it can't find a match.
And why is the idFieldAdapter null?
Because in the constructor(see below), the list parameter was null after submitting the form.
Do I need to persist my List of objects? I don't want this....
And I think the example on the wiki doesn't work as well.
Does anyone had this error earlier?
public GenericValueEncoder(List<T> list, String idField, PropertyAccess access) {
if (idField != null && !idField.equalsIgnoreCase("null")) {
if (list.size() > 0) {
this.idFieldAdapter = access.getAdapter(list.get(0).getClass()).getPropertyAdapter(idField);
}
}
this.list = list;
}
> Hello
>
> I use the select component with the @InjectSelectionModel annotation as described here:
> http://wiki.apache.org/tapestry/Tapestry5AnotherSelectWithObjects
>
> <select t:type="select" t:id="categorySelect" model="categoriesSelectionModel" encoder="categoriesValueEncoder" value="selectedCategory" />
>
> The select is nicely loaded with categories. Next I submit the form and I notice that the setSelectedCategory method is called. But it prints "setSelectedCategory: null"
> See below for some the corresponding java code. What am I doing wrong? Why is the selectedCategory null, after I have selected a category and submitted the form?
>
> @InjectSelectionModel(labelField = "name", idField = "id")
> @Property
> private List<Category> categories = new ArrayList<Category>();
>
> @Persist
> private Category selectedCategory;
>
> public void setSelectedCategory(Category selectedCategory) {
>
> System.out.println("setSelectedCategory: " + selectedCategory);
>
> this.selectedCategory = selectedCategory;
>
> }
>
> public Category getSelectedRootCategory() {
> return selectedRootCategory;
> }
>
>
>
> _________________________________________________________________
> More than messages–check out the rest of the Windows Live™.
> http://www.microsoft.com/windows/windowslive/
_________________________________________________________________
Show them the way! Add maps and directions to your party invites.
http://www.microsoft.com/windows/windowslive/events.aspx