[hibernate-issues] [Hibernate-JIRA] Created: (ANN-747) @CollectionOfElements does not cascade on delete

[Nicole Rauch (JIRA)]

@CollectionOfElements does not cascade on delete
------------------------------------------------

                 Key: ANN-747
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-747
             Project: Hibernate Annotations
          Issue Type: Bug
    Affects Versions: 3.3.1.GA
         Environment: Hibernate 3.2.6 GA
Database: H2 1.0.72
            Reporter: Nicole Rauch


Consider the following constellation:

@Embeddable
public class Foo {
   // ...
}

@Entity
public class Bar {
   @CollectionOfElements
    private Set<Foo> myFoos;
    // ...
}

When I persist a Bar object that contains some Foos, and when I later decide to delete the Bar object, I get a foreign key constraint violation error message because the Foo objects, which contain a reference to the Bar object that owns them, are not deleted automatically. I would expect the default behaviour to be "on delete cascade" because the Foo objects are embeddables, thus they cannot exist on their own without the Bar object that owns them. But there is no way to tell Hibernate to cascade:

- the @OnDelete annotation is only allowed for OneToMany relations
- the @Cascade annotation is being ignored
- there is no "cascade" property for the CollectionOfElements

So my question is: Why does the cascading not occur automatically, and how do I tell Hibernate to cascade anyways?

Thanks a lot in advance,

Nicole


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