Delete selected row from DataModel

[rramjet]

I am using an ArrayList as the source for a DataModel. It works fine for display, and edit, but I get an error when I try to delete the selected row.

The backing bean is a stateful session bean. Here are some code snippets:

   @DataModel
    private List<Owner> owners = new ArrayList<Owner>();
    
    public List<Owner> getOwners() { return owners; }

...

    public void edit(Owner ownr)
    {
     System.out.println("owner name = " + ownr.getFirstName());
     ownerEdit = "true";

          
     // create new local object - allow cancel
     owner = new Owner(ownr.getId(), ownr.getFirstName(), ...
    }
     
    public void delete()
    {
     System.out.println("owner id = " + ownerIndex);
     owners.remove(findOwner(ownerIndex));
    }

Here's the xhtml code:

   <rich:dataTable id="owners" value="#{owners}" var="ownr"
                rendered="#{not empty owners}">
             
         <h:column>
           <f:facet name="header">First Name</f:facet>
                      #{ownr.firstName}
         </h:column>
                                    
...       
                  
     <h:column>
           <s:link action="#{createAccount.edit(ownr)}" value="Edit" />
        </h:column>
                  
     <h:column>
        <s:link action="#{createAccount.delete}" value="Delete"
                            rendered="#{ownr.id != 1}">
                           <f:param name="ownerId" value="#{ownr.id}"/>
        </s:link>
        </h:column>

     </rich:dataTable>

The error I get when I remove the selected object from the arrayList is:

Caused by: java.lang.IllegalArgumentException
     at javax.faces.model.ListDataModel.getRowData(ListDataModel.java:139)
     at org.jboss.seam.databinding.DataModelBinder.getSelection(DataModelBinder.java:69)

Thanks

[nickarls]

Could there be something with the fact that there is no submit (s:link)? Try a commandLink or something submitting...

[danielc.roth]

I do it this way. Works fine for me

<rich:dataTable 
 value="#{regionList}" var="region" id="products" rows="10" width="100%">
     <h:column>
          <f:facet name="header">
               <h:outputText value="#{messages['regions.account']}" styleClass="text" />
          </f:facet>
          <h:outputText value="#{region.account}" styleClass="text" />
     </h:column>
     <h:column>
          <f:facet name="header">
               <h:outputText value="#{messages['regions.delete']}" styleClass="text" />
          </f:facet>
          <s:button action="#{adminRegions.delete(region)}" value="#{messages['regions.delete']}" disabled="#{region.deleted}" styleClass="text" />
     </h:column>
     <h:column>
          <f:facet name="header">
               <h:outputText value="#{messages['regions.undelete']}" styleClass="text" />
          </f:facet>
          <s:button action="#{adminRegions.undelete(region)}" value="#{messages['regions.undelete'] }" disabled="#{!region.deleted}" styleClass="text" />
     </h:column>
</rich:dataTable>

    @DataModel
    private List<Region> regionList;

    @In
    private EntityManager em;

    @Factory("regionList")
    public void findRegions() {
        regionList = em.createQuery("SELECT o FROM Region o ORDER by o.id desc").getResultList();
    }


    public void delete(Region region) {
        region.setDeleted(true);
        em.persist(region);
    }
    
    public void undelete(Region region) {
        region.setDeleted(false);
        em.persist(region);
    }    

Hopefully I didn't cut out anything essential :-)

[rramjet]

Thanks for the response. The difference between your example and what I'm doing is that I'm physically removing an object from an ArrayList in the delete method rather than a soft delete. The stack error indicates an illegal argument error trying to fetch rowData from the ListDataModel wrapper.

All the examples I've see use entity queries (resultList) with DataModel - no ArrayList.

[rramjet]

Thanks for your response. The s:link is working fine and returning the selected object id using @DataModelSelectonIndex. I've also returned the object itself successfully using both delete(ownr) and @DataModelSelection.

I think I'm dealing with an ArrayList issue.

[rramjet]

The work-around is to create a new ArrayList in the delete method. I'm runnng Seam 1.2.1 and this is apparently fixed in Seam 2.0.