[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3843) @Audited and @ManyToMany relation problem - after modyfing an Entity: org.hibernate.NonUniqueObjectException with message: "a different object with the same identifier value was already associated with the session ...

[Michał Maryniak (JIRA)]

@Audited and @ManyToMany relation problem - after modyfing an Entity: org.hibernate.NonUniqueObjectException with message: "a different object with the same identifier value was already associated with the session ...
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                 Key: HHH-3843
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3843
             Project: Hibernate Core
          Issue Type: Bug
          Components: envers
    Affects Versions: 3.3.1
         Environment:  envers.jar 1.2.0, Hibernate 3.3.1, postgresql-8.3, jboss-4.2.3
            Reporter: Michał Maryniak
         Attachments: enverse.7z

There is a problem with unidirectional @ManyToMany relation. 
This case is different than the one with inheritance: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3830.

The example is trival and code is as simple as it can be.
A single Person can have many roles, and one Role can by assigned to many Person entities.

@Entity
@Audited
public class Person implements Serializable {
(...)
@ManyToMany
	public List<Role> getRoles() {
		return roles;
	}
(...)
}

and

@Entity
@Audited
public class Role implements Serializable {
(...)
}


And here comes a use case:

1) I create role 'admin'
2) I create role 'user'
3) I create person 'john' and add him a role 'admin'
4) I edit 'john' and add him second role 'user'
and I got an exception:

org.hibernate.NonUniqueObjectException with message: "a different object with the same identifier value was already associated with the session: [Person_Role_AUD#{roles_id=1, Person_id=5, REV=DefaultRevisionEntity(id = 7, revisionDate = 2009-04-01 10:46:32)}]"

If I add one role and remove the second one, or if I only remove a role - an Exception does not occur.

I attached a zip file with this simple SEAM project generated by seam-gen 2.1.1 GA.
I haven't included jar files, but project requires jar's "generated" with seam-gen (2.1.1) and following jar's have been replaced with new ones:
2008-06-13  13:09           313˙898 dom4j.jar								 	1.6.1
2009-03-23  13:01           285˙158 envers.jar									1.2.0-hibernate-3.3
2008-08-20  11:27           279˙714 hibernate-annotations.jar					3.4.0.GA
2008-08-20  11:31            66˙993 hibernate-commons-annotations.jar			3.1.0.GA
2008-08-20  12:19           119˙292 hibernate-entitymanager.jar					3.4.0.GA
2008-12-04  14:39           304˙236 hibernate-search.jar						3.1.0.GA
2008-09-10  14:01            62˙574 hibernate-validator.jar						3.1.0.GA
2008-09-10  13:27         2˙766˙130 hibernate.jar								from hibernate-distribution-3.3.1.GA-dist
2008-06-13  13:09            13˙236 jta.jar										1.1 (from hibernate-distribution-3.3.1.GA-dist)
2008-12-04  14:41           818˙961 lucene-core.jar								2.4.0 701827 - 2008-10-05 16:44:37
2008-08-19  20:40            17˙384 slf4j-api.jar								1.5.2

If you wish - I can attach a file with my oryginal jar - but it would be a realy big file ;-)

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