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LaurentDelcLaurentDelc 

Loop in a template + rerender -> repeat or dataTable tag disappears

Hi,

 

 

We encountered a weird problem which seems to be a really specific bug.
Here is the situation:
We use a template with a repeat tag that repeats only once (the list has only one element for the test) the body attribute:
 
    
<apex:page showHeader="false" controller="testController2">
<apex:repeat value="{!listTest}" var="te">
<apex:insert name="body" />
</apex:repeat>
</apex:page>
 
 
Here is the controller:
public with sharing class testController2 {   public List<String> listTest{ get; set; }    public testController2 (){       listTest= new List<String>();        listTest.add('1');    }}
Then in a VF page using this template we try to rerender a list. The direct display of the list works but not on a table or repeat tag. It "disappears".
 
Here is the page:
<apex:page showHeader="false" controller="testController">  <apex:composition template="CSTemplate">             <apex:define name="body">        <apex:form >        <apex:commandButton value="test" action="{!changeValue}" rerender="dataBlock" status="status"/>        <apex:outputPanel layout="block" id="dataBlock" styleClass="block">           <h2>Test</h2>                            <apex:actionStatus id="status" StyleClass="status" startText="working..."/>                test: {!myValue}            <apex:dataTable value="{!myValue}" var="data">               <apex:column > {!data} - </apex:column>            </apex:dataTable>        </apex:outputPanel>       </apex:form>     </apex:define>            </apex:composition></apex:page>
 

 
And the controller:
 
public with sharing class testController {    public testController (){        myValue = new List<String>();        myValue.add('1');    }    public PageReference changeValue() {        myValue.add('2');        return null;    }    public List<String> myValue { get; set; }}
 
Some precisions:
- The display of the dataTable wihtout rerender works fine, it is after a rerender that the display disappear
- the rerender by itself works as we can see the values inside the List being updated 
- the problem doesn't occur if we don't use a loop in the template definition
- the problem doesn't occur if both the template and the page use the same Controller (this one is really weird)
 
To sum up:
If you use a loop in a template, the rerender of a repeat or a dataTable in a page that uses this template won't work (the list "disappears")
 
 
Thanks,
 
Laurent 
 
Message Edited by LaurentDelc on  09-08-2009 08:17 AM