Re: tag causing could not be resolved as a collection/array/map/enumeration/iterator type error

[catchme <ca...@gmail.com>]

HI 
I was lookin for the same Query for last whole day . i m working on struts
2.0.11.2
an dfinnaly got to know that its not tah much easy to use selct tag :-|
anywasy finally i got the answer
that v need to passs list in action class 
to get record list in select tag
thx 4 help 

Mark Greene wrote:
> 
> Hi All,
> 
> After a couple of days I can't seem to figure this validation problem out.
> I
> have a basic JSP form (create.jsp) with a textfield (with validation) and
> a
> select list (WITHOUT validation). When I submit the form to trigger a
> validation failure on purpose, the text field is validated correctly and
> the
> user input is still present, however, the select list disappears below it
> and the following error is given:
> 
> ERROR [[default]] Servlet.service() for servlet default threw exception
> tag 'select', field 'list', name 'catID': The requested list key
> 'categories' could not be resolved as a
> collection/array/map/enumeration/it
> erator type. Example: people or people.{name} - [unknown location]
> 
> I've read about similar problems and they say to initialize the
> collections
> in the prepare(). I did that and I'm still getting the problem. Another
> solution I've heard was to put the Collection in the session. This doesn't
> seem like a scalable solution for applications that are deployed in a
> session replicated enviornement like clustering. Please tell me that
> putting
> the list in the seseion isn't the only work around?
> 
> -----------------------------------------------------------------------------------------------------------
> Action Code:
> ------------------------------------------------------------------------------------------------------------
> public class CreateTicket extends ActionSupport implements Preparable {
> 
>     private Map categories;
> 
>     public Map getCategories() {
>         return categories;
>     }
> 
>     public void setCategories(Map categories) {
>         this.categories = categories;
>     }
> 
>     public String execute() throws Exception {
>         this.prepare();
>         return SUCCESS;
>     }
> 
>     public void prepare() throws Exception {
>         categories = new HashMap();
>         categories.put(1, "test");
>         categories.put(2, "test2");
>         categories.put(3, "test3");
>     }
> }
> 
> 
> public class HelloWorld extends ActionSupport {
> 
>     public static final String MESSAGE = "Struts is up and running ...";
>     private String name;
>     private Integer catID;
> 
>     public Integer getCatID() {
>         return catID;
>     }
> 
>     public void setCatID(Integer catID) {
>         this.catID = catID;
>     }
> 
>     public String execute() throws Exception {
> 
>         setMessage(MESSAGE + " " + getName());
> 
>         return SUCCESS;
> 
>     }
> 
>     private String message;
> 
>     public void setMessage(String message) {
>         this.message = message;
>     }
> 
>     public String getMessage() {
>         return message;
>     }
> 
>     public String getName() {
>         return name;
>     }
> 
>     public void setName(String name) {
>         this.name = name;
>     }
> 
> ----------------------------------------------------------------------------------------------------------
> /tutorial/create.jsp Code:
> ----------------------------------------------------------------------------------------------------------
> 
> 
> 
> 
> 
> 
> ----------------------------------------------------------------------------------------------------------
> struts.xml Code:
> ----------------------------------------------------------------------------------------------------------
> 
>     
>     
> 
>     
>         
>             /ticket/create.jsp
>         
>         
>             /ticket/createconfirm.jsp
>             /ticket/create.jsp
>         
>     
> 
> 
> ----------------------------------------------------------------------------------------------------------
> HelloWorld-validaiton.xml:
> ----------------------------------------------------------------------------------------------------------
> 
>     
>         name
>         10
>         10
>         true
>         Your name needs to be 10 characters long
>     
> 
> 
> 
HI 
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