[jboss-user] [JBoss Seam] - Re: Stale Session Objects ? DataModelSelection Problems
Sorry about the bad formatting and being lazy. I am tying to provide
add/remove functionality through a page, where by there is a 1 to
many relationship.
If I now take the messages example and modify it
to add messages (remove already exists) I cannot get this to work
properly, can anyone point me in the right direction or to an example
that does this ie managed relationships for objects?
In the view - messages.jsp I added (I tried make it format nice, but for some mysterious
reason it does not want to, i have previoued this severla times :-( )
anonymous wrote :
| <!-- Added New Messages -->
| <h:form>
|
|
|
| <h:outputLabel for="title">Title:</h:outputLabel>
|
|
| <h:inputText id="title"
value="#{message.title}"/>
|
|
| <h:outputLabel for="text">Text:</h:outputLabel>
|
|
| <h:inputText id="text"
value="#{message.text}"/>
|
|
|
|
| <h:commandButton value="Add Message"
action="#{messageManager.addMessage}"/>
|
|
|
| </h:form>
| <!-- End Add New Messages -->
|
For the MessageManager
anonymous wrote :
| @Local
| public interface MessageManager
| {
| public void findMessages();
| public void select();
| public void delete();
| public void destroy();
| public void addMessage();
| }
|
For the MessageManagerBean
anonymous wrote :
| public class MessageManagerBean implements Serializable, MessageManager
| {
|
| @DataModel
| private List messageList;
|
| @DataModelSelection
| @Out(required=false)
| private Message selectedMessage;
|
| // --- Added ----- //
| @In(required = false, create = true)
| @Out(required=false)
| private Message message;
|
| @PersistenceContext(type=EXTENDED)
| private EntityManager em;
|
| @Factory("messageList")
| public void findMessages()
| {
| messageList = em.createQuery("from Message msg order by msg.datetime
desc").getResultList();
| }
|
| public void select()
| {
| selectedMessage.setRead(true);
| }
|
| public void delete()
| {
| messageList.remove(selectedMessage);
| em.remove(selectedMessage);
| message=null;
| }
|
| @Remove @Destroy
| public void destroy() {}
|
| // --- Added ----- //
| public void addMessage() {
| message.setRead(false);
| message.setDatetime(new Date());
| em.persist(message);
| messageList.add(message);
| //messageList = em.merge(messageList);
| message = null;
| }
|
| }
|
Do you see where I am going wrong ? As it stands I can add 1 message, but then
I cannot add a second and the input box never gets cleared.
I am after a clean example that adds/removes etc ? Any ideas ? TIA
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