DataModelSelection does not work with PAGE scope

[ilya78]

Hi, I am outjecting a DataModel on PAGE scope, but DataModelSelection is null(when I click on a h:datatable row). I don't understand why it doesn't work - I am struggling with it for a couple of days now.

Here is a simple application that does just this:

@Name("eventLister")
@Scope(ScopeType.EVENT)
public class EventListerAction implements Serializable {

 @In FacesMessages facesMessages;

 @DataModel(value="eventList", scope=ScopeType.PAGE)
 private List<Integer> eventList;

 @DataModelSelection
 private Integer selectedEvent;

 @Factory("eventList")
 public void initRequestList() {
 eventList = new ArrayList<Integer>();
 eventList.add(1);
 eventList.add(2);
 eventList.add(3);
 }
 public void selectEvent() {
 facesMessages.add("selected event: "+selectedEvent);
 }

}

and the page eventList.xhtml:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:a="https://ajax4jsf.dev.java.net/ajax"
 template="layout/template.xhtml">

<ui:define name="body">

 <h:messages globalOnly="true" styleClass="message"/>

 <h:dataTable value="#{eventList}" var="item" >
 <h:column>
 <f:facet name="header">Event</f:facet>
 <s:link action="#{eventLister.selectEvent}" value="#{item}"/>
 </h:column>
 </h:dataTable>
</ui:define>

</ui:composition>

Please help.

[ilya78]

I see in Component.java (injectDataModelSelection method) this code:

 if (null!=null)
 {
 setFieldValue( bean, null, name, wrapper.getWrappedData(dataModelAnn, dataModel) ); //for PAGE scope datamodels (does not work for properties!)
 }

so it seems that for PAGE scoped datamodels, there is some code that should be executed and is not...

[matt.drees]

It looks like that code isn't in cvs anymore; you could try updating and seeing if it works for you.

[pmuir]

That code has nothing to do with the datamodelselection (but the datamodel itself). It now does work with properties in CVS.

[ilya78]

I have tested the functionality using a seam-gen'd application using seam 2.0. It still does not work.

I guess it is a bug.

[pmuir]

[url]http://jira.jboss.com/jira/browse/JBSEAM-1877

[ilya78]

Yes, I have tested myself with h:commandButton, and it works even if the DataModelSelection has no scope specified (and the bean is event scoped).

With s:link it only works if the scope is long running conversation.

Thanks Pete.