Does cascade="all_delete_orphan" only work in the

mchyzer · **Joined:** Sat Jul 17, 2004 5:16 pm **Posts:** 143

When I use cascade="all-delete-orphan" will it only work in the hibernate session where I select the data? I would like to "update" in a new session, though I think it will not delete orphans. Thanks, Chris

emmanuel · **Posted:** Mon Aug 16, 2004 5:54 pm

It will delete the orphans if you keep the same collection instance Hibernate give to you.

matsekberg · **Joined:** Mon Nov 14, 2005 7:07 am **Posts:** 9

emmanuel wrote:

It will delete the orphans if you keep the same collection instance Hibernate give to you.

And if I have to make the update (in my case removal of children) in another collection (lost since I have made entity->DTO->entity)?
Is it possible to get hibernat on the track again?

mchyzer · **Joined:** Sat Jul 17, 2004 5:16 pm **Posts:** 143

matsekberg wrote:

emmanuel wrote:

It will delete the orphans if you keep the same collection instance Hibernate give to you.

And if I have to make the update (in my case removal of children) in another collection (lost since I have made entity->DTO->entity)?
Is it possible to get hibernat on the track again?

Im not sure exactly what you are asking, but I think you want to edit a different collection and put the stuff back in the hib collection.

Code:

List newList = process(hibObj.getHibList());
//process newList
//... [insert code here]
//now you need to put the objects back in the hib list 
//(dont clear, add and retain):
hibObj.getHibList().addAll(newList);
hibObj.getHibList().retainAll(newList);

Chris

matsekberg · **Joined:** Mon Nov 14, 2005 7:07 am **Posts:** 9

Thanx for yor patience!
Ill try to explain the problem.

I have two persistent objects; a Parent and a Child. The Paretn holds a Set of Child.
I execute a find() on the Parent and get the Parent and the Set of Child's.
The Parent and the Child'ren are then copied to a PartentTO and ChildTO respectively by using commons-beanutils with custom converters. In other words, the entities data are copied to transfer objects. These transfer objects are then passed to the web tier where they are changed. The specific scenario that do not work is when the web tier has removed on of the children from the parent, this is done on the ParentTO and ChildTO. The ParentTO with the Set of Child (where on child has been removed) is now converted back to entity objects, ie Parent and Child.
The Parent is then update()-ed and the problem is that the removed Child dont get removed in the DB. (cascading is set ok).
The reason being that the original hibernate generated collection of Child in the Parent entity has been broken by copying the collection to the TO and then back to the entity.

So what I need is a way to "restore" the original collection so that hibernate realizes that one child has been removed and therefore deletes it from the DB.