Question

I have a proxy for a lazy entity which has been created in the session by loading a child entity. A subsequent fetch on the parent entity only returns the NH proxy. I need the actual instance to check the type (the entity has joined subclasses). I must be missing something, but I can’t find a way to do this. Session.Refresh(proxy) does not appear to help, nor does any flavour of HQL that I’ve tried.

Can anyone help?

Answer 1

To force a proxy to be fetched from the database, you can use the NHibernateUtil.Initialize(proxy) method, or access a method/property of the proxy.

var foo = session.Get<Foo>(id);
NHibernateUtil.Initialize(foo.Bar);

To check if an object is initialized or not, you can use the NHibernateUtil.IsInitialized(proxy) method.

Update:

To remove an object from the session cache, use the Session.Evict(obj) method.

session.Evict(myEntity);

Info about Evict and other methods for managing the session cache can be found in chapter 14.5 of the NHibernate docs.