[richfaces-issues] [JBoss JIRA] Updated: (RF-1341) Problems with Ajax requests within a a4j:repeat loop

[Nick Belaevski (JIRA)]

     [ http://jira.jboss.com/jira/browse/RF-1341?page=all ]

Nick Belaevski updated RF-1341:
-------------------------------

    Fix Version/s: 3.2.0

> Problems with Ajax requests within a a4j:repeat loop
> ----------------------------------------------------
>
>                 Key: RF-1341
>                 URL: http://jira.jboss.com/jira/browse/RF-1341
>             Project: RichFaces
>          Issue Type: Bug
>    Affects Versions: 3.1.3
>         Environment: MyFaces, Richfaces 3.1.3 snapshot
>            Reporter: Peter Mahoney
>             Fix For: 3.2.0
>
>
> I have come across two problems following a change to put some fields in an a4j:repeat loop. The backing beans have not changed. This is the code:
> 						<a4j:repeat id="termClauses" value="#{collectionSearchHandler.termClauses}" var="clause">
> 							<a4j:region id="vocabularyFilterRegion">
> 								<h:selectOneMenu id="vocabularyFilter" value="#{clause.vocabulary}">
> 									<a4j:support id="vocabularyAjaxSupport" event="onchange" reRender="termFilterPanel" ajaxSingle="true" />
> 									<f:selectItem itemValue="#{collectionSearchHandler.blankVocabulary}" itemLabel="#{msgs.quizFirstVocabularySelectItemDescription}" />
> 									<f:selectItems value="#{collectionSearchHandler.vocabularyFilterItems}" />
> 								</h:selectOneMenu>
> 								<a4j:status startText="#{msgs.quizTermSearchInProgressMessage}" />
> 							</a4j:region>
> 							<a4j:region id="termFilterRegion">
> 								<a4j:outputPanel id="termFilterPanel">
> 									<h:panelGroup rendered="#{clause.hasVocabulary}">
> 										<ul style="list-style-type:none; margin:0px;">
> 											<a4j:repeat id="termFilters" value="#{clause.termFilters}" var="termFilter" rowKeyVar="idx">
> 												<li>
> 													<h:selectOneMenu id="termFilter" value="#{termFilter.term}" converter="com.dbplc.quiz.Term" style="width:100%">
> 														<a4j:support id="termAjaxSupport" event="onchange" reRender="termFilterPanel,qbankSearchResultsPanel" ajaxSingle="true" actionListener="#{collectionSearchHandler.searchPerformed}" />
> 														<f:selectItem itemValue="#{collectionSearchHandler.blankTerm}" itemLabel="#{msgs.quizFirstTermSelectItemDescription}" />
> 														<f:selectItems value="#{clause.termFilterItemMap[idx]}" />
> 													</h:selectOneMenu>
> 													<h:commandButton actionListener="#{collectionSearchHandler.searchPerformed}" />
> 												</li>
> 											</a4j:repeat>
> 										</ul>
> 									</h:panelGroup>
> 								</a4j:outputPanel>
> 								<rich:messages />
> 							</a4j:region>
> 						</a4j:repeat>
> Firstly I get the following error when the form is submitted by changing the "VocabularyFilter" value:
> /questionsearch.xhtml @25,77 value="#{clause.vocabulary}": Target Unreachable, identifier 'clause' resolved to null
> If I add an onchange="this.form.submit()" to the field, to bypass the Ajax, it works fine.
> So, with the above workaround, I then get the problem that the collectionSearchHandler.searchPerformed() method (referenced by the a4j:support tag) is only called every second form submit. This worked without problems before adding the outer a4j:repeat. Using the commandButton to submit the form works every time.

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