[ojb-users] Cascading deletes through ODMG

[Brian D. <bde...@in...>]

Hi all,

Is the ODMG API supposed to delete items in a 1:n collection
automatically for you?

I saw in the FAQ that "Objects are registered to a transaction so that
on commit of
the transaction it knows that d and e do not longer belong to the
collection. the ODMG collection will not delete the objects
d and e but only the REFERENCES from the collection to those objects!".

I'm not sure exactly what is meant though by "REFERENCES" vs. the actual
object in a 1:n relationship.

I have a User object with a collection attribute for Permissions. When I
find a persisted User, and then call remove a Permission from the User
object's collection, and then commit the transaction, the related row in
the permission table is not deleted.

For example:

transaction.begin();

String removePermID = "DNLD";

User user = ... find persisted user...;

for(Iterator i = user.getPermissions().iterator(); i.hasNext;)
{
    Permission perm = (Permission)i.next();
    if(perm.getPermissionID().equals(removePermID)
    {
        user.getPermissions().remove(perm);
    }
}

transaction.commit();

Am I misunderstanding how its supposed to work?

Thanks in advance,
Brian

--
Brian DeVries                   Sr. Software Engineer
mailto:bde...@in...   http://www.intraware.com
Voice: 925.253.6516             Fax: 925.253.6785
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