2 Replies Latest reply on Oct 12, 2009 12:12 AM by B Tomic

    Page scope not maintaining state

    B Tomic Newbie

      I have a common "search, display results, do something with the selected one" scenario. I am using page scope for the @DataModel. The problem occurs when I attempt to perform an action (using parametrized method binding) on the selected item as, for some reason, the selected item is always null.


      Here's the whole thing:


      @DataModel(scope=ScopeType.PAGE)
           private List<Item> items;
      


      <rich:dataTable id="items" var="item" value="#{items}" rendered="#{items.size > 0}">
      ...
      <s:link id="voteForItem" value="Vote"
                          action="#{itemList.addVote(item)}" />
      


      public void addVote(Item i) {
                assert currentUser != null;
                Vote vote = new Vote(i, currentUser);
                entityManager.persist(vote);
      }
      



      "Item i" passed to addVote is always null, so it always throws an exception (as it requires a non-null value). Changing the @DataModel scope to CONVERSATION fixes this, but I do not want to do that as it interferes with other aspects.


      I double and triple checked if I am doing something wrong, but I can't see anything.
      As SiA states:



      The page context is capable of propagating data from the Render Response phase of the JSF
      life cycle through at least the ensuing Invoke Application phase on a postback, then on
      to the Render Response phase if the same view is rendered again without a redirect.

      Any clues what might be going on? Any insight is greatly appreciated...