Hi,

I have a "HibernateException: identifier of an instance of com.webdmt.modelo.hibernate.Departamento was altered from Departamento de Informática to Laboratorio DEI" when trying to modify a primary key.

How can i modify a primary key without having this Exception?

Thanx guys!

It's the very definition of a primary key that the value of this attribute never changes as long as the record is alive.

http://en.wikipedia.org/wiki/Primary_key

Hi again,

Well i know but... if your database definition has Update: cascade you could modify even primary keys.

When i use directly in MySQL-command line, a sentence like : update departamento set nombre_departamento = "new id" where nombre_departamente = "old id"
mysql lets me change it, and changes all tables where nombre_departamento is a foreign key.

Can't Hibernate do the same?

No, and it's a very very bad idea.

We never change primary key or use update query to change the primary key, it is never recommened.