[jboss-user] [JBoss Seam] - DataModel PersistentSet problem from rich subtable

[amitdk]

Hello
I have a situation that requires me to use the DataModel and DataModelSelection tags in a rich subtable tag. Here's the xhtml code:

  | <rich:dataTable value="#{taskObjectives}" var="taskObj"
  | 	columnsWidth="70%,15%,15%"
  | 	style="align:center">
  | 	
  | 	<f:facet name="header">
  | 		<rich:columnGroup>
  | 			<rich:column>
  | 				<h:outputText value="Assigned Task" />
  | 			</rich:column>
  | 			<rich:column>
  | 				<h:outputText value="Update Unapproved" />
  | 			</rich:column>						
  | 			<rich:column>
  | 				<h:outputText value="Remove" />
  | 			</rich:column>													
  | 		</rich:columnGroup>					
  | 	</f:facet>
  | 		
  | 	<rich:column colspan="3" style="background-color:#F1E1D1">
  | 		<h:outputText value="#{taskObj.description}" />
  | 	</rich:column>
  | 	
  | 	<rich:subTable var="selectTask" value="#{taskObj.taskAssignments}"
  | 		onRowMouseOver="this.style.backgroundColor='#E0E0E0'"
  | 		onRowMouseOut="this.style.backgroundColor='#{a4jSkin.tableBackgroundColor}'">
  | 		<rich:column>
  | 			<h:outputText value="#{selectTask.comments}" />
  | 		</rich:column>					
  | 		<rich:column style="text-align:center">
  | 			<s:button type="submit" action="#{report.updateTask}"
  | 				value="Update Task" />
  | 		</rich:column>
  | 		<rich:column style="text-align:center">
  | 			<s:button type="submit" action="#{report.removeTask}"
  | 				value="Remove Task" />
  | 		</rich:column>
  | 	</rich:subTable>						
  | </rich:dataTable>
  | 
There is a one to many relationship from taskObjective and taskAssignment. DataModel tag is used on the taskObjective, however since taskAssignments aren't exposed that way, I get the following exception on the subtable section:

  | Caused by: javax.faces.el.PropertyNotFoundException: /WeeklyReport.xhtml @52,55
  | value="#{selectTask.comments}": Bean: org.hibernate.collection.PersistentSet, pr
  | operty: comments
  |         at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.ja
  | va:58)
  |         at javax.faces.component.UIOutput.getValue(UIOutput.java:80)
  |         at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue
  | (RendererUtils.java:223)
  |         ... 77 more
  | 

Is there any built-in way to convert a PersistentSet to a DataModel for use in the the subtable? If not what would be a good way to implement this - use a converter??

Any hints or tips appreciated.
Thanks
Amit Karandikar

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