newbie: saveOrUpdate does not update Collection

kenhans · **Joined:** Tue Dec 13, 2005 5:43 pm **Posts:** 5

hello,
I have a POJO which contains a Set:

Code:

public class GeOutage  implements java.io.Serializable {
     private Set geOutageComponents;
}

When I am trying to remove an item from the POJO's set and store it to the database again, the changes are not updated. My outage-POJO is clearly updated, though...

Code:

GeOutage outage = (GeOutage)session.load(GeOutage.class, id);
Set outageComponents = outage.getGeOutageComponents();
outageComponents.remove(outageComponentToRemove);
Transaction transaction = session.beginTransaction();
session.saveOrUpdate(outage);
transaction.commit();

I guess this is basic Hibernate knowledge, but I just don't seem to get it... Why is my POJO updated, but the database not? My GeOutage.hbm.xml has the following setting:

Code:

    
<set name="geOutageComponents" lazy="true" inverse="true" cascade="all">
     <key>
         <column name="GEO_ID" />
     </key>
     <one-to-many class="GeOutageComponent"/>
 </set>

Any help would be highly appreciated.

cheers,
Kenny

spurcell · **Posted:** Thu Dec 15, 2005 10:39 am

Have you tried this with lazy="false"? I am new also, but it would be something I would try.

anthony · **Posted:** Thu Dec 15, 2005 10:55 am

<set name="geOutageComponents" lazy="true" inverse="true" cascade="all">

you seem to have a bidirectionnal association (inverse=true) so
Set outageComponents = outage.getGeOutageComponents();
outageComponents.remove(outageComponentToRemove);

isn't enough, you must manage the other association end as explained in most of the docs, wiki, books, tuto, articles,.....