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[b]Hibernate version:3.0[/b]

[b]Mapping documents:[/b]

[b]Code between sessionFactory.openSession() and session.close():[/b]

[b]Full stack trace of any exception that occurs:[/b]

[b]Name and version of the database you are using:postgresql 8.0[/b]

[b]The generated SQL (show_sql=true):[/b]

[b]Debug level Hibernate log excerpt:[/b]

Hi all,

I'm actually having a problem when calling session.update method. Here is a description of my problem. I have a class 'Customer' and my corresponding table 'customer' in my database in which i have a row with id=1 and name='test'. I then do the following to update the row with id=1:

Customer c = new Customer(1, "test1");
session.update(c);

I got an exception, ClassNotfoundException NotUniqueObjectFound as soon as I call session.update(c). But the strange thing is that at times the update is done correctly. Why I got the exception?

In fact to update an object I found that I should get an instance of the object first by calling session.get(ClassName, UniqueIdentifier) not by doing a newInstance(). Why?


Thanks in advance

You have a transient object. Session.update() is intended for detached objects. Call Session.saveOrUpdate() instead.