RE: [OJB-developers] Bug in M-N relationships

[Matthew B. <ma...@so...>]

Found that you have to set one side of the many to many collection
auto.update to false in the repository.

Not very intuitive :)

Maybe we should have a way of detecting bidirectional relationships and
avoid this situation?

I don't quite know enough about the innards to know what the ramifications
are, but I will start to look at it.

-----Original Message-----
From: Matthew Baird
To: 'obj...@li... '
Sent: 5/12/02 7:27 PM
Subject: [OJB-developers] Bug in M-N relationships

Given the following database tables
USER
USER_ROLE
ROLE

and the objects
User
Role

if I create a relationship in the objects by adding a user to a role,
then
make it persistent, everything is ok.

if, after I create one relationship, create a new user and add him to
the
role and persist it, the relationship record in USER_ROLE that existed
for
the first relationship gets multiplied by 3. Then if I do it again, it
gets
multiplied by 3 again. This could quickly get out of control.

Can anyone confirm this behaviour?

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