Howdy,

I'm trying to create an ordered parent/child relation using a list collection (I need to keep the items in order and list seemed the way to go).

I can basically get it to work - when I save the "parent", hibernate saves it and persists the "children" that I've added to the parents list/collection property. So I'm pretty sure I'm in teh ballpark.

However, the two "key" fields that link the child back to the parent are not being filled in. The column for the key and index are being left null/empty.

Here's an extract of the parent HBM file

<class
name="SOpen.spm.dao.StudentRoot"
table="student_base"
dynamic-update="false"
dynamic-insert="false"
>

<id
name="primaryKey"
column="primary_key"
type="int"
unsaved-value="0"
>
<generator class="sequence">
<param name="sequence">hibernate_sequence</param>
</generator>
</id>

<version
name="recordVersion"
type="int"
column="record_version"
/>

<list
name="snapshotList"
table="Student"
lazy="false"
inverse="true"
cascade="all"
>

<key
column="root_key"
/>

<index
column="snapshot_order"
/>

<one-to-many
class="SOpen.spm.dao.Student"
/>
</list>

There is a column called "root_key" and "snapshot_order" in the child table (which is represented by the Student object that is persisted to it).

The logic (which is very simple right now - open session/transaction, create a parent, create a child, put child in parents list, save(), commit, close) seems to work - no errors of funny messages. And all other values for the parent and child objects are correctly persisted.

I'm using Postgreqsl (if that helps at all).

Any ideas of what to look for next?

Thanks!

Gerry

As you have not posted any of the driver code perfoming this, I can only assume that you are not setting the parent's value on the child. This is all covered in the docos on Parent/Child relationships.

http://www.hibernate.org/hib_docs/reference/html/parent-child.html#parent-child-bidir