Persist a List

[yacin00]

Hi
i have a problem to persist a list

   ... 
    @OneToMany(fetch = FetchType.LAZY)
    @JoinColumn(name ="notificationId")
    private List<Notification> notification;
...

...
         <h:selectManyCheckbox id="notificat" required="true" value="#{registration.selectedNotifications}" converter="javax.faces.Long">
            <s:selectItems value="#{notifications}" var="notif" label="#{notif.name}" itemValue="#{notif.notificationId}" />    
         </h:selectManyCheckbox>       
...

...
   @In(required=false)
   private List<Notification> selectedNotifications;
...
 ContactNotification contactNotif = new ContactNotification();   
...
contactNotif.setNotification(selectedNotifications); 
...
em.persist(contactNotif); 
...   

I have a NULL value in the database when I persist, what is wrong?

[ericjava.eric.chiralsoftware.net]

What is wrong is, you can't persist a List.

If the java.util.List class had an @Entity notation on it, you could.  But it doesn't.

You need to do this some other way.  In particular, you need to create an Entity to contain the list, like:

@Entity ContactNotifications {
  
  @OrderBy("contactOrderField")
  public List<Contact> getContactList() { ... }

}

Or, go through the list and persist each ContactNotification one at a time.

Does it make sense?

[yacin00]

hi, sorry,it's somewhat late, But, i found an example which affirm that we can persist a list, i don't know if it works. I'll try...

My Link
???

[yacin00]

and it works!!