ISession.Update Updates Multiple Objects

sh_kamalh · **Joined:** Fri Sep 10, 2010 12:20 pm **Posts:** 3

I have noticed, by using log4net, that when calling ISession.Update, it updates all the changed objects.

For example:

Code:

// Change 2 instances 
user1.IsDeleted = true;
user2.UserName = "Xyz";
// Call session.Update to update the 2 users
Session.Update(user1); // This updates both user1 & user2.
Session.Update(user2); // Now there is no need for this

Is this the default behavior of NHibernate or has something to do with my mapping file?
Can I make NHibernate update one by one?

Best regards,
Shehab.

Update:
I not only call Session.Update(user1) however I call Session.Update() followed by Transaction.Commit(). So after the first commit, both objects are updated in the database.
I need only user1 to be updated in the database after the call of first Commit() then user2 by the call of second commit. Can I achieve that?

wolli · **Posted:** Sun Sep 19, 2010 4:17 am

session.Save/SaveOrUpdate/Update are used for (re-)attaching objects to a session. The objects in a session are not saved until the session is flushed. You can do that explicitly with session.Flush() or implicitly in a transaction with transaction.Commit().

In your case, if you already have objects in your session that have been changed, they will be updated in the database together with the objects you explicitly update. If you want to update them separately you either need two sessions or clear the session after the first update (and flush).