Problem with el parameter in dataTaqble

[amitev]

Hi all! I have the following code:

ejb for populating the dataTable

@Stateful
@Name("projectSearch")
public class ProjectSearchBean implements com.amitev.bts.ejb.ProjectSearchLocal {

 @PersistenceContext
 private EntityManager em;

 @DataModel
 private List<Project> projects;

 @Factory("projects")
 @SuppressWarnings("unchecked")
 public void retrieveProjects() {
 projects = em.createQuery("from Project").getResultList();
 }
..........

The web page with the dataTable:

<h:dataTable var="proj" value="#{projects}">
 <h:column>
 <s:link value="#{proj.name}" action="#{projectBrowse.selectProject(proj)}" />
 </h:column>
</h:dataTable>

And the projectBrowse bean

@Stateful
@Name("projectBrowse")
public class ProjectBrowseBean implements com.amitev.bts.ejb.ProjectConversationLocal {

 @PersistenceContext(type=PersistenceContextType.EXTENDED)
 private EntityManager em;

 @In(required=false) @Out
 private Project project;

 private Issue issue;

 @Begin
 public void selectProject(Project selectedProject) {
 System.out.println("selectedProject: " + (selectedProject==null));
 }
 ....

But when i click on the link in the dataTable, null is passed to the selectProject method. The url looks like this:

.../project/list.jsf?actionMethod=pages%2Fproject%2Flist.xhtml%3AprojectBrowse.selectProject%28proj%29&cid=2&dataModelSelection=proj%3Aprojects%5B0%5D

Idea why null is passed to the action method. I saw this code in seam 1.2.1 booking demo so i suppose it has to work.

[g00se24]

Don't know where your direct problem is, but I use;

 <h:dataTable id="clearingchannelsSelectable" value="#{searchuser.selected.clearingChannelTypes}" var="item" >
 <rich:column>
 <a4j:commandLink value="Delete" action="#{clearingchannels.delete(item)}" reRender="clearingchannelsSelectable"/>
 </rich:column>
 </h:dataTable>

and a generic method:

pubic void select(Object object) {
 setSelected(object);
}

Cause I use inheritance for seam component I couldn't post a easy to understand example.

Could it be that the @In destroys the selected obejct?

@In(required=false) @Out

Try to remove it.
private Project project;

[amitev]

I've removed it but still doesn't work. Other suggestions?

[dajevtic]

Could it be that you are not in the same conversation?
Meaning: After the page is displayed, your bean is probably destroyed (also your projects).
You should begin the conversation in your Factory, not in your select method.
For the select method use @Begin(join=true), for your factory use @Begin annotation.
Hope it helps.

[amitev]

That was exactly the problem. Thank you for the help!