how to save this object using only 1 transaction?

crixtiano · **Posted:** Wed May 16, 2007 12:28 pm

Please, I have 3 classes of objects.

They are parents from another. Example:

"A" is a conteiner of "B", and "B" set "C", like this:

Code:

A.add(B);
B.set(C);

So, I'm trying to save "A" Object, but Hibernate tell me this is not possible, because there are two or more "C" object with the same identifier.

The exception mesage is:

Code:

Caused by: com.expert.dao.ExpertDaoException: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.expert.pojos.Conta#25]

Where "com.expert.pojos.Conta" above is my "C" object.

I want add "A" object iside only 1 transaction. I think it will be very inconvenience if I have to do a new transaction to each "B" object I want to save in my data base.

Is there a more easy way to save "A" object in an only and unique session opened???

Thank you.

Cristiano

himawan · **Joined:** Sat Aug 19, 2006 6:31 pm **Posts:** 139

Can you show your mapping files?

I suspect you have to set inverse=true in your bidirectional links.

crixtiano · **Posted:** Thu May 17, 2007 6:08 am

nope

I'm not usint inverse = true

But I found a way to save C object too.

The exception was occurred because there are two or more C object with the same ID in session.

I'm using this way now:

Code:

while (itr.hasNext() {
  B a = (B)itr.next();
  B.setC( serviceC.get(C.getId()) ); // <-- I added this line
  serviceB.save(B);
  A.add(B);
  serviceA.save(A);
}

serviceA.save(A);

It's work now.

Thank you.

ataveras · **Posted:** Thu May 17, 2007 9:34 am

hello guys, i believe himawan, that it would be problems with the inverse=true if C where a collection in B but it's just a single many-to-one, i think that it's a problem with cascade. I know that you can solve this problem in a more elegant way without:

Quote:

B.setC( serviceC.get(C.getId()) ); // <-- I added this line

Try to play with cascade and let us know how it went.