Hibernate version: 3.2 (annotations 3.3.1, entitymanager 3.3.2)
Name and version of the database you are using: HSQLDB 1.8.0.9

I have 2 classes (Computer and Software) with a ManyToMany association. Since the access is always done from the Computer side, the Software Entity has no coresponding ManyToMany field.

Any change made to a Computer should be logged (with the preUpdate method).



When I change the name of a Computer, the preUpdate is called as it should, but when I add a Software to a Computer's software Collection, the preUpdate method is NOT called.

Is this behaviour normal or am I doing something wrong? How can I make the preUpdate method beeing called when a collection is changed?

Hi,

If I am not mistaken @PreUpdate is called before db update operations. Adding sofware would trigger an insert operations though. Try also adding a @prePersist. Also check http://www.hibernate.org/hib_docs/entitymanager/reference/en/html_single/#listeners.

--Hardy

Thanks for the hint Hardy.

When I add a Software the first time, @prePersist is called on the Software entity, but not on the Computer. Any subsequent adding or removing of software to or from Computers (remember: it's a many-to-many association) does neither trigger any entity lifecycle methods on the Computer or the Software.

As a workaround, I can add a mapping class with two many-to-one and the coresponding one-to-many associations on the Computer and Software.

In general, it seems to me that the entity lifecycle methods are only called when:
- a field on a database table changes
AND
- there is a entity for that table
AND
- the entity has a field that maps to the changed field on the database

can anyone approve this?