Hibernate version:
3.1beta1

Mapping documents:

<class name="eg.Actor" table="ACTORS">
<id name="id" column="ID"><generator class="native" /></id>
<property name="name" column="NAME" />
</class>

<class name="eg.ActorRole" table="ACTOR_ROLES">
<id name="id" column="ID"><generator class="native" /></id>
<property name="name" column="NAME" />
<many-to-one name="actor" column="ACTOR_ID" />
</class>

Problem:

Hi, I've got a very weird problem... Until I switched to annotations mapping, I was able to set an entity's associations without pre-loading these by creating empty objects with the right id.

For example, if I want to create a new ActorRole entity linked to the Actor entity #1, just doing the following would be enough:



This would result in a new ActorRole record persisted with the correct FK in the ACTOR_ID column (#1).

Now that I switched to annotations, the same code would get me an exception:

org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: eg.Actor

Does anybody see what could be wrong?

Thanks a lot,
Xavier.

do something else
Actor actor = (Actor) session.load(Actor.class, new Integer(1));
or
Actor actor = entityManager.getReference(Actor.class, new Integer(1));