N-to-N associations can be tricky. Would list your mapping files ? On Fri, Jun 5, 2009 at 10:32 AM, Chris <[email protected]> wrote:
> > Not sure what WCF is? > > As for tests to recreate ... I don't have a small testbed at this > point. In general, NHibernate has been working for us, and continues > to do so, it's just this one strange situation. As previously > mentioned if I query for a user object and add a group to it, then > save/commit the user, it works fine. If I query for a group object and > then add a user to it, then save/commit the group, that's when this > occurs. In both cases, the queried object correctly populates the list > of users/groups so this seems to imply that the mapping is setup > correctly. I have seen similar errors when the mapping is incorrect, > but I've never seen it complain about not being able to locate one of > its own internal classes. Was hoping someone else has seen it before > and had a resolution. > > On Jun 5, 8:31 am, Fabio Maulo <[email protected]> wrote: > > Is there any other part of the story you want say us ?WCF ? > > Tests to recreate the exception ? > > > > 2009/6/4 Chris <[email protected]> > > > > > > > > > > > > > I have a weird exception that’s being thrown from NHibernate where it > > > seems to not be able to lookup one of its own classes. The background > > > is that I have 2 objects Users & Groups mapped to corresponding > > > tables. On each, there’s a many-to-many bag that uses another table to > > > maintain relationship. In each class, the corresponding bag is mapped > > > to a System.Collections.IList. The problem is that if I add a user to > > > a group, the unknown entity class exception (see subject) is thrown. > > > However, if I add a group to a user, all works as expected. > > > Additionally, I can remove a user from a group w/o error. It’s only > > > upon addition that it crops up. Most of the knowledge base I’ve seen > > > around this usually is a result of mapping incorrectly, but I’m pretty > > > sure this mapping is setup ok. Any help is appreciated. > > > > > Exception: > > > [04/Jun/2009:15:34:38.187] (8 ) ERROR - could not synchronize > > > database state with session > > > NHibernate.MappingException: Unknown entity class: > > > NHibernate.Collection.PersistentBag > > > at NHibernate.Impl.SessionFactoryImpl.GetEntityPersister(Type > > > theClass) > > > at NHibernate.Impl.SessionImpl.GetClassPersister(Type theClass) > > > at NHibernate.Impl.SessionImpl.GetEntityPersister(Object obj) > > > at NHibernate.Impl.SessionImpl.GetEntityIdentifierIfNotUnsaved > > > (Object obj) > > > at NHibernate.Type.EntityType.GetIdentifier(Object value, > > > ISessionImplementor session) > > > at NHibernate.Type.ManyToOneType.NullSafeSet(IDbCommand st, Object > > > value, Int32 index, Boolean[] settable, ISessionImplementor session) > > > at > > > > NHibernate.Persister.Collection.AbstractCollectionPersister.WriteElement > > > (IDbCommand st, Object elt, Int32 i, ISessionImplementor session) > > > at > > > NHibernate.Persister.Collection.AbstractCollectionPersister.Recreate > > > (IPersistentCollection collection, Object id, ISessionImplementor > > > session) > > > at NHibernate.Impl.ScheduledCollectionUpdate.Execute() > > > at NHibernate.Impl.SessionImpl.Execute(IExecutable executable) > > > at NHibernate.Impl.SessionImpl.ExecuteAll(IList list) > > > at NHibernate.Impl.SessionImpl.Execute() > > > > > XML mapping: > > > <class name="MiCo.MiForms.Server.MFSUser, DataCore" > > > table="mfs_user"> > > > <id name="ID" column="id_mfs_user" type="Int32"> > > > <generator class="native" /> > > > </id> > > > <bag name="Groups" table="user_to_group"> > > > <key column="id_mfs_user"/> > > > <many-to-many class="MiCo.MiForms.Server.MFSGroup, DataCore" > > > column="id_mfs_group" /> > > > </bag> > > > </class> > > > > > <class name="MiCo.MiForms.Server.MFSGroup, DataCore" > > > table="mfs_group"> > > > <id name="ID" column="id_mfs_group" type="Int32"> > > > <generator class="native" /> > > > </id> > > > <bag name="Users" table="user_to_group"> > > > <key column="id_mfs_group"/> > > > <many-to-many class="MiCo.MiForms.Server.MFSGroup, DataCore" > > > column="id_mfs_group" /> > > > </bag> > > > </class> > > > > -- > > Fabio Maulo > > > -- Humberto C Marchezi --------------------------------------------------------- Master in Electrical Engineering - Automation Software Consultant and Developer at the Town Hall of Vitória --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nhusers?hl=en -~----------~----~----~----~------~----~------~--~---
