display selected item on selectonelistbox using s:convertEntity

[jseanjensen]

I'm trying to solve this problem before I try to fit it into my app.  I've got an object (axe) and I've got an owner (axeOwner) I want the object to be associated with an owner.  All is well until I try to render the selectonelistbox that correctly displays the current owner for the axe.  I can populate the list using the following snippet.

<s:decorate id="ownerField" template="layout/edit.xhtml">
    <ui:define name="label">Owner</ui:define>
    <h:selectOneListbox 
          id="owner" 
          value="#{axeHome.instance.owner}"
          size="1" >
                               
     <s:selectItems  
                value="#{axeOwnerList.resultList}" 
                noSelectionLabel="Select an Owner"
          itemValue="#{axeOwner}" 
                var="axeOwner" 
                label="#{axeOwner.name}" 
                hideNoSelectionLabel="false"/>

     <s:convertEntity/>
    </h:selectOneListbox>

However I cannot get it to display the already selected item as a default in the list.  The convert entity tag helps get the correct display and allows the user to select an owner just fine.  Is there a technique that I can use to display the selected value on render?

[jseanjensen]

I've come up with a solution to my problem. . . sort of.  I set the noSelectionLabel to be the instance owner name which gives me the display output that I need but seems to be a hack.  Then my problem turns into how to render the same page to create a new axe but not be forced to select an owner.  I ended up creating two listboxes and conditionally rendering them so that I can render a selection when there is one but allow the user to create a new axe without picking an owner.  This is how I did it.

<s:decorate id="ownerField" template="layout/edit.xhtml">
     <ui:define name="label">Owner</ui:define>
     <h:selectOneListbox rendered="#{axeHome.instance.owner ne null}"
          id="editOwner" 
          value="#{axeHome.instance.owner}"
          size="1">
          <s:selectItems  
               noSelectionLabel="#{axeHome.instance.owner.name}"
               hideNoSelectionLabel="false"
               var="axeOwner" 
               value="#{axeOwnerList.resultList}" 
               itemValue="#{axeOwner}"
               label="#{axeOwner.name}" 
               />
               <s:convertEntity/>
          
     </h:selectOneListbox>
     
     <h:selectOneListbox rendered="#{axeHome.instance.owner eq null}"
          id="addOwner" 
          value="#{axeHome.instance.owner}"
          size="1">
          <s:selectItems  
               noSelectionLabel="Select Owner"
               hideNoSelectionLabel="false"
               var="axeOwner" 
               value="#{axeOwnerList.resultList}" 
               itemValue="#{axeOwner}"
               label="#{axeOwner.name}" 
               />
               <s:convertEntity/>
          
     </h:selectOneListbox>
</s:decorate>

The axe and axeOwner classes are simple entities:

@Entity
public class Axe implements Serializable
{
    private Long id;
    private Integer version;
    private String name;
    private String history;
    private AxeOwner owner;
    ... getters and setters ...
}

@Entity
public class AxeOwner implements Serializable
{
    private Long id;
    private Integer version;
    private String name;
    ... getters and setters ...
}

This solution may work in my application but it seems like a hack.  It seems strange that the select attribute of the list items isn't triggered.  I was hoping someone would explain this to me but I had to figure it out for myself.  Is there anywhere that is more active for this sort of thing than this forum?

[mikkus70]

Don't use the itemValue property of the s:selectItems tag, s:convertEntity should handle that for you (if you put #{axeOwner} there, it should evaluate it to the class toString() method, which is not what s:convertEntity expects.

See the documentation section 33.1.2.2 which gives an example of how s:convertEntity should be used. Note the usage example given:

<h:selectOneMenu value="#{person.continent}" required="true">
  <s:selectItems value="#{continents.resultList}" var="continent" 
                  label="#{continent.name}" 
                  noSelectionLabel="Please Select..."/>
   <s:convertEntity />
</h:selectOneMenu>

[ahmeric]

Emir is right. but this is not the solution for this problem.
I have the same trouble. and I couldn't find any solution except Sean did.

@Sean , have you found any new solution for this stituation.

thnx.

[vata2999]

have u tried to begin conversation in order to set axOwner it perfectly works for me

AxOwnerList.java

@Override 
@Begin(join=true)
public List getResultList(){

//whatever

}