Hi all,
I'm using SaveOrUpdate() in aspx page & Composite key is define in .hbm.xml file. When I retrive data it works fine but while calling SaveOrUpdate() it throws following error.
Anyone could please help me out for the same:

Error is :
a different object with the same identifier value was already associated with the session

poonam,

Try to avoid using saveOrUpdate.

What is happening is, in your application you are having already an object with the same ID, in a "persistent" state.

In the short term, try not calling that method at all, and see of your object is saved anyways at the end, when you flush the session or commit the transaction.
If this doesn't work, use merge() instead.

In the long term, take a good look at the meaning of "persistent", "transient" and "detached".
An article of mine here

http://hibernar.org/articulos_en/persis ... ethods.php

explains Hibernate persistence methods, and why, in general, using saveOrUpdate() is a bad idea.

Hi gonzao_diaz,

Thanks for replay,
We have gone through article, it is really very helpfull, & my error was solved using merge(). But to delete object which method should I use?

Thanks