Hi all,

In order to map a many to many with association class,
I take a closer look to the implementation provided within
Admin app application:

I noticed the following at runtime :

public UserRole addRole(Role role) {
if ( getRoles().indexOf(role)>=0 ) {
throw new RuntimeException("role already assigned");
}
getRoles().add(role);
role.getUsers().add(this);
UserRole ur = new UserRole(this, role);
getUserRoles().add(ur);
return ur;
}

getRoles().add(role) used an java.util.Arraylist and
role.getUsers().add(this); use an net.sf.hibernate.collection.Bag

and following exception occured :


13:48:02,610 ERROR LazyInitializationException:25 - Failed to lazily initialize a collection - no session or session was closed
net.sf.hibernate.LazyInitializationException: Failed to lazily initialize a collection - no session or session was closed
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:214)
at net.sf.hibernate.collection.PersistentCollection.write(PersistentCollection.java:84)
at net.sf.hibernate.collection.Bag.add(Bag.java:281)


If someone has any idea,
Thanks in advance.
zoeeoz.

Hi all,

In order to clarify my question, I would like to add the following

It seems that when lasy is activated for Role object and only when,
(User use lazy or not)

getRoles().add(role); work fine but,
role.getUsers().add(this) raised exception below.

In my case user is not already persisted and role is comming
from object cache.

If someone has any idea regarding this,
Thanks in advance.
Ph.