Hi there,
I'm stuck on the following problem:

I have two tables A and B. A has got a nullable foreign key to B.
If I delete a row from A, I want the corresponding row in B to be deleted as well.

Here is what I tried in my .hbm.xml files:

<class name="A" table="A" >
....
<many-to-one name="B" column="b" not-null="false" class="B" foreign-key="FK_a_to_b" cascade="all" lazy="false"/>
...
</class>

If I now delete a row from A, the associated row in B remains where it is.
I would have thought, the solution would be to use cascade="all-delete-orphan", but this does not seem to be defined for many-to-ones.

My question is:
What would be the preferred way to do what I intend here?

Thanks a lot in advance!

Your definition is correct. No need to user orphans here (there are mostly needed for collections). Could you give more details on how you perform your delete operation?