What type of problem are you having? If you're using OTM, ODMG, or JDO, you need to set auto-update to false. Eric
-----Original Message----- From: Timofey Korolev [mailto:[EMAIL PROTECTED] Sent: Monday, June 30, 2003 8:38 AM To: OJB Users List Subject: RE: 1:n mapping On Mon, 2003-06-30 at 16:17, Jim Shingler wrote: Hope this helps, I am assuming that the problem is the Repository.xml file Thank you Jim, i appreciate your help, but this is not what i need. I'll try to be more specific. I got two classes: class General { private Collection particles; private int id; private String title; } and class Particle { private int particalId; private String name; private int generalId; private General generalObject; } I'm trying to do following mapping <class-descriptor class="General" table="GENERAL" > <field-descriptor name="id" column="id" sequence-name="general_id_seq" jdbc-type="NUMERIC" autoincrement="true" primarykey="true" /> <field-descriptor name="title" column="title" jdbc-type="VARCHAR"/> <collection-descriptor name="particles" element-class-ref="Particle" orderby="particleId" sort="DESC" > <inverse-foreignkey field-ref="generalId"/> </collection-descriptor> </class-descriptor> <class-descriptor class="Particle" table="PARTICLE"> <field-descriptor name="particleId" column="id" jdbc-type="NUMERIC" autoincrement="true" primarykey="true" sequence-name="particle_id_seq" /> <field-descriptor name="name" column="name" jdbc-type="VARCHAR"/> <field-descriptor name="generalId" column="gid" jdbc-type="NUMERIC"/> <reference-descriptor name="generalObject" class-ref="General" auto-retrieve="true" auto-update="true" auto-delete="true"> <foreignkey field-ref="generalId"/> </reference-descriptor> </class-descriptor> I've made this mapping looking on the Advanced O/R Tutorial om OJB's site. And this thing doesn't work. I am at a loss. I want to use it in my phd work, but this problem makes me sick. I think that ojb can save a lot of my coding time... -- Regards, CEO Linux-Online.Ru Korolyov Timofey www.linuxshop.ru :: www.prefnews.ru :: www.dotstyle.ru JabberID: [EMAIL PROTECTED] DISCLAIMER: The information contained in this e-mail is, unless otherwise indicated, confidential and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.