Consider the following object graph.

A --> *B --> *C --> *D

( ie A has parent/child to many Bs, which has parent/child to many Cs, etc.)

All are mapped with cascade "all-delete-orphan"

If I do the following code:

a.B_Collection.Remove(b);
b.A = null;

( note that this orphans the entire subtree from B down )

then create a brand new session and save using SaveOrUpdateCopy(A), I get an exception about "deleted object will be re-saved" referring to B I have completely removed the reference to B from A.

if I use SaveOrUpdate, it works.

Why the difference?


Hibernate version:
NHibernate 0.9