Mr McLaren

Hi,

This is my first post here so go easy on me!

I found this discussion very helpful as I had exactly the same problem.

My unique identifier is a string, it is assigned and I don't want it to be generated any other way.

I found a solution in the
Hibernate Users FAQ.

saveOrUpdate(), or cascade save, executes UPDATE instead of INSERT!

There are two reasons why this could occur:

The <id> element does not specify the correct unsaved-value

You are using an assigned identifier or a composite identifier

In the first case, you should simply specify the correct unsaved-value.

In the second case, you have several choices. In Hibernate 2.1 either:

specify unsaved-value for the <version> or <timestamp> property

implement Interceptor.isUnsaved() and Interceptor.onSave(), as described in chapter 16 of the reference documentation

So for the above example a simple solution would be to add a timestamp element after the <id> section of the mapping file.

E.g.

<timestamp name="lastUpdatedDatetime" column="last_updated" unsaved-value="null"/>

Granted, this would add an additional column in the database table but at least it would now work with assigned generators.

HTH

Mark
[ February 16, 2005: Message edited by: Mr McLaren ]