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Hibernate version: 2.0.1.GA

Mapping documents: Attributes

Code between sessionFactory.openSession() and session.close():
ContactAddressEntity ent = session.Get<ContactAddressEntity>( 25L );
Console.WriteLine( "{0}, {1}", ent.AddressID.ID, ent.AddressID.GetType( ).Name );

Full stack trace of any exception that occurs:
None

Name and version of the database you are using:
SQL Server 2008

I have a ContactAddressEntity with a many-to-one mapping to AddressEntity on the AddressID property of ContactAddressEntity.

Address has a subclass called AKAddressEntity.

If I map AddressID with Lazyness.Proxy I always get an AddressEntityProxy type for the AddressID property. This happens regardless of the descriminator value of the target row. Thus I cannot get to the properties of the AKAddressEntity.

If I map AddressID with Lazyness.False (that being the only change to the mapping) I get the correct AKAddressEntity as expected when the target row contains the discriminator value for AKAddressEntity. Furthermore I also get AddressEntity type when the discriminator value is the default specified for AddressEntity.

So Eager many-to-one associations to table-per-class hierarchy types function as expected. Lazy associasions do not.

Is there any way to get this to work?

Have a look at chapter 16.1.3 of the reference documentation. Sounds like your problem:

http://nhforge.org/doc/nh/en/index.html#performance-fetching-proxies

Yea, according to that there is no way to inject my own load code. So I'm kinda out of luck.

You could try and implement yor own proxy generator ... but that might be a little bit of an overkill for what you want. But have a look at the nhusers group at google. You can probably find some answers there.

Actually I thought this was in regards to my other post. I get confused easily :-) Disregard my previous reply.

In this case the way that the sub-class is mapped I should get a proxy to my sub-class (AKAddressEntity), not a proxy to the superclass (AddressEntity).

It's strange that when I set the many-to-one to eager I get the sub-class. It's only when I set the relationship to lazy that I always get the superclass.

Hmm... now that I think about it I guess there's no way for that to happen. It's too bad that the proxy is "pre-loaded".

The problem is that hibernate can't know what the concrete class is without touching the database. And the idea of the proxy is to not touch ... so the proxy is build for what is defined in the mapping.