One thing behaved strangely after I migrated my code to Seam 2.0 CVS. Say there is code like this: | @Stateful | @Scope(CONVERSATION) | @Name("strange") | public class StrangeBacking implements Serializable, Strange{ | @In EntityManager em; | private List<Something> somethings; | | // getter and setter of somethings | | public void action1(){ | this.somethings = em.createQuery("...").getResultList(); | } | | public void action2(){ | this.somethings = null; | } | | public void action3(){ | // the code does not touch the list somethings; | } | } | | In the test.xhtml, there's something like this: | | ... | <h:commandButton action="#{strange.action1}", value="action 1", type="submit" /> | | ... | <h:commandButton action="#{strange.action2}", value="action 2", type="submit" /> | | ... | <s:button action="#{strange.action3}", value="action 3" /> | <h:form rendered="#{strange.somethings == null}"> | ... | </h:form> | Prior to the migration the form was successfully rendered after clicking the buttons in this sequence: action 1 --> action 2 --> action 3. But today it does not work. I used SeamTest to see if the list somethings was really nulled out in the method action2(), the test passed. But when I looked into the seam debug page, "somethings" always happily sat in the conversation context, not nulled out!? My current fix was like this: | public void action2(){ | this.somethings.clear(); | } | | and in the test.xhtml: | | <h:form rendered="#{empty strange.somethings}"> | ... | </h:form> | Then the form got rendered. But I do not understand this. Why the list somethings in the conversation context cannot be nulled out but can be cleared out? Any enlightenment would be highly appreciated! Regards, Ellen View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058445#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...