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

[Peter Mahoney (JIRA)]

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


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.


-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira