I have a pool which contains poolclients. I want to do the same thing as in the hibernate manual 22.3 (last case).

I use this code to delete a poolclient:



I always get a constraint error for the poolclient however (which should be deleted)

org.hibernate.PropertyValueException: not-null property references a null or transient value: epaper.server.model.PoolClient.pool

These are my settings:

pool.hbm



poolclient.hbm



Pool.java



I suspect that getPoolClients().remove(pc) doesn't work. If I put getPoolClients.contains(pc) in the removePoolClient method, it always answers false, even if the pool contains a poolclient with the same id...

Here is my equals method in PoolClient:



Can someone help me cause I'm really stuck here...

What's that supposed to do?

There is a bidirectional link between pool en poolclient.

pc.setPool(null) sets the reference from the poolClient to the pool to null, because the poolClient doens't belongs to the pool anymore.

I expected to remove the poolClients with null reference with "all-delete-orphan"

I just wrote this test in the removePoolClient method. The output is weird...



Output:


Method removePoolClient, remove poolclient with id :4
PoolClients in this pool:
PoolClient met id : 2
PoolClient met id : 3
PoolClient met id : 4
Output of getPoolClients().contains(pc) :
Pool does not contain pc


This would mean getPoolClients.remove(pc) does not remove the poolclient from the set no?
I don't see any errors in the equals function...

Just remove the set(null) thing and it will work.

I tried this and the error is gone now, but it just doesn't remove the poolclient from the database.

The removePoolClient(pc) function just doens't seem to remove the poolclient from the set... (see the test output above)

http://www.hibernate.org/ForumMailingli ... AskForHelp

First item in "When posting".

What do you mean by that? I gave you the information that seamed necessary to me... What else you need?[/quote]

It's not me, I'm done here. But somebody else might take a round at guessing. To make it easier you should not ignore but provide the information you have been asked about before:

Hibernate version:

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

It looks like you're using the database primary key in the equals method, and that's something to be avoided if possible. See this article:
http://www.hibernate.org/109.html

And lots of other resources online. Have you checked to see why exactly equals is failing? That's the problem you need to solve here. Christian's advice has taken care of your other problem. There is one logical problem that I see. Your check for null will return false if either or both objects have a null id. What if both are null? Are they equal? Are they just two transient entities?