Hi all,

First of all, sorry fo the long subject, but it's the best way I could describe my question.

I'm using Hibernate 2.1.

I have a one-to-many relationship between tables A and B modelled in Oracle 9i such that each B record contains a field a_id, identifying the A record that the B record is associated with.

The corresponding Java object model consists of classes A and B, where A has a java.util.Collection member to contain B instances, and each B object has a member called aId, corresponding to th a_id attribute of the B table.

I've created the appropriate hbm.xml files, and I have had no problems using hibernate to insert, update or search for these objects. When I insert an A object that contains a Collection of B objects, the a_id column in the B table correctly references a record in the A table, but the aId members of the B objects in the Collection are not updated to with the id of their parent.

Should I expect the child foreign key members to be updated? If so, then I'd appreciate any thoughts regarding why they aren't getting updated now. This is the definition of the B collecition in A.hbm.xml

<set name="bSet" table="B" cascade="all">
<key column="a_id"/>
<one-to-many class="A"/>
</set>

Thanks in advance for your help,

You should not handle ids, Hibernate is done for that.
add a <many-to-one name="a" column="ad_id"/> in your B mapping (you can access a_id using b.getA().getId()

And set the one-to-many inverse="true".

Refer the Parent / Child relationship chapter for more info.

Sounds good. Thanks for the help.