Cascade Deletion

[Marco Barenkamp]

Hello,

To simplify the situation, I will construct a simple example:
Consider, I have a Person that has addresses (bi-directional)

   
public class Person {
 ...
 @OnetoMany(cascade=CascadeType=ALL)
  private List<Address> addresses;
}
 
public class Address {
 ....
  @ManyToOne(...)
 private Person person;
}
 

The problem is:
When I update an existing address or when I create a new address, I simply use the

EntityManager.merge(person) 

method and everythink works as expected.
But when I delete an address the deletion is not detected by the EntityManager,
beause I cannot see any SQL statements when I call

EntityManager.merge(person) 

Is this the intended bahaviour? I was expecting the address to be removed when merging the appropriate person.

Any comments?
I am using Sun App Server 9 (TopLink) for this example.

[Mark Spritzler]

Merging is for reattaching detached objects. Why aren't you calling persist to actually persist the change/deletion.

It depends, and it is explained in the Java Persistence with Hibernate book and also on the Hibernate website documentation page.

Mark