Hi,
this could be difficult. I see some strange behaviour and right now I can only explain it with the fact that there are different objects (instances) of the same (persisted) object in the session. So normaly I would get an org.hibernate.NonUniqueObjectException, but I don’t get one.

So the question is, if this Exception is disabled per default in NHibernate? And if there is a property to set, so that nhibernate will be able to manage such things by it’s own? (don’t wanna write workarounds :) )

Thanks for your help,
Tobi

Looks like hibernate can't properly distinguish the instances. What kind of identity do you use ? Have you overwritten Equals() and GetHashCode() in your class ? Can you post the identity part of the mapping and the implementation of the class ? Maybe we can say more then.

Hi,

thanks for your help, we're using Guids and the equals and hash code methods are not overwritten.

<id name="OrderId" column="OrderId" type="Guid">
<generator class="guid.comb" />
</id>

Don’t know if this is helpful?

Have a look here:

http://www.nhforge.org/blogs/nhibernate/archive/2008/09/06/identity-field-equality-and-hash-code.aspx

I'm not absolutely sure if implementing Equals and GetHashCode solves your problem, but from your description it pretty much sounds like hibernate has problems distinguishing the instances. Looks like hibernate uses reference equality which is the reason why you don't get the expected exception.