Hi, can somebody tell me why cascade is not working here?

<class name="Boss" table="Boss">
....
<set name="guards" inverse="true" cascade="all">
<key column="boss_id"/>
<one-to-many class="Guard"/>
</set>
....
</class>

<class name="Guard" table="Guard">
....
<many-to-one name="boss" column="boss_id"/>
....
</class>

And this is the code:
Transaction tx = sess.beginTransaction();
Boss b = (Boss)sess.load(Boss.class, new Long(29));
Guard g = new Guard();
g.setName("Miei");
g.setBoss(b);
b.addGuard(g); //addGuard only add the object to Set of Guard
tx.commit(); //error on this line

I was thinking that I don't have to save "g" first because I use cascade, but seem that it didn't work.

And I get this error:
net.sf.hibernate.HibernateException: SQL update or deletion failed (row not found)

I may be wrong, but I'm not sure it makes much sense to have cascade enabled on inverse collections...

Basically, inverse means the owning entity doesn't manage the collection.

I don't know much about that.
Actually I was just following the example from Hibernate 2.1.1 Documentation, Chapter 9. Parent/Child Relationships, about cascade.
There I see that it set inverse=true and cascade=all

I've also tried to remove the "inverse" attribute, but it still didn't work.

Turn Hibernate debug on and post it - may be easier to track the pbl.

It makes sence.
inverse="true" is only about relationship management

Check you unsaved-value

Thanks!
It turns out that I wrote unsaved-value=null but I use primitive type for the identifier.
I changed it to use primitive wrapper object and it worked.