Hibernate version: 1.0.4

Mapping documents:

A pretty complex mapping for a (parent-)hotelobject with a few BAGged collections.

One of the bags is:

<bag name="RoomsUntyped" outer-join="true" fetch="join" lazy="false" cascade="none" inverse="true">


Code between sessionFactory.openSession() and session.close():

..SaveOrUpdate(hotel)

I came across the following situation:

I want to save-update the parent-object Hotel, but is there a way to tell NHibernate in c# code to ignore the Rooms collection for just this time?

That is, sometimes in code I do want the room-collection to be saved to the database, which can mean deleting some child-objects if necessary, but in another scenario that particular collection should be ignored when saving/updating the parent hotelobject because only other fields of parent-object must be updated.

By default, with what you mapped, it won't propagate/cascade anything since you put cascade="none".

From what I remember, it's not possible without using a very tricky way (I already asked the question some months ago), though I'm using Hibernate and not NHibernate.

But I'm not sure this trick is even possible with NHibernate since it's based on the 2.x version of Hibernate, and not the last one (3.x).

Since you are not using cascades and the collection is inverted, you should be able to acheive what you want by evicting them from the session. (ISession.Evict())