[jboss-user] [JBoss Seam] - ManyToMany association within conversation scope bean
Hi all.
I have 2 entities linked via many-to-many association
| @Entity
| @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
| public class User implements Serializable {
| @Id
| @GeneratedValue
| private long id;
|
| @NotEmpty
| @Column(unique = true)
| private String username;
|
| @ManyToMany(cascade = CascadeType.ALL)
| @JoinTable(
| name="UserToProvider",
| joinColumns = { @JoinColumn( name="user_id") },
| inverseJoinColumns = @JoinColumn( name="provider_id")
| )
| private Collection<Provider> providers = new ArrayList<Provider>();
| }
|
| @Entity
| @Table(name="Provider" )
| @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
| public class Provider implements Serializable {
| @Id
| @GeneratedValue
| private int id;
| @NotNull
| private String UPI; //Unique Provider identifier
|
| @ManyToMany(mappedBy="providers", cascade = CascadeType.ALL, fetch =
FetchType.EAGER)
| private Collection<User> users;
| }
|
Users list displayed on Provider form
| ....
| <h:panelGrid title="Users">
| <ui:repeat var="user"
value="#{providerFormAction.provider.users}">
| <h:commandLink value="#{user.firstName}
#{user.lastName}" action="#{userFormAction.view(user)}"/>
| <br/>
| </ui:repeat>
| <h:commandButton action="#{userFormAction.addNew}"
value="Add new"/>
|
| ...
|
|
userFormAction.addNew() and .view() methods are marked as starting nested conversation.
Save() method finihes current converastion and restore parent.
| public class UserFormAction implements java.io.Serializable {
| @In
| EntityManager entityManager = null;
|
| @In
| Conversation conversation;
|
| private User user = null;
|
| @Begin(nested=true)
| public String addNew() {
| user = new User();
| return "/jspx/userForm.jspx";
| }
|
| @Begin(nested=true)
| public String view(User u) {
| user = u;
| return "/jspx/userForm.jspx";
| }
|
| public void save() {
| entityManager.persist(user);
|
| // tried flush - it did not help!!!
| // entityManager.flush();
|
| // to return to previous conversation
| conversation.endAndRedirect();
| }
|
| ....
|
After returning to Provider form it is still displaying OLD links (i.e. if I created new
user linked to this provider - it is not displayed, if I removed link - it is still
displayed as linked), although username is refreshed!
If I clear conversationId in browser address bar then links become correct.
Looks like marked as "mappedBy" end of many-to-many association is not refreshed
properly in Seam - I tested other fields type - simple properties, ManyToOne, active end
of ManyToMany - all refreshed properly OR I'M WRONG?.
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