Hibernate Session saveOrUpdate does not update

Another problem I’ve it recently with saveOrUpdate that can be fix by using the same saveOrUpdate but give the class name.

Using the session.saveOrUpdate(myObject) might give you a unknown entity while using the same method with the class name in parameter won’t.

session.saveOrUpdate(myObject); //give a unknown entity
session.saveOrUpdate("MyObjectClassName", MyObject); //Work

The important difference between the org.hibernate.Session class methods, save & saveOrUpdate is, save generates a new identifier and results in an INSERT query, whereas saveOrUpdate does an INSERT or an UPDATE.

For a more complete summary of what each of these method do check the hibernate site or this stackoverflow question/answer