How to map a sequenced composite-id w/o using a new class

josetesan · **Joined:** Thu Nov 19, 2009 5:38 am **Posts:** 4

Hi all.

I have a transactions table, with a sequence id generated by mysql.
<id name="id" type="long" column="ID">
<generator class="native"/>
</id>

Now, i want to add a new field to the pk, being it a property of the class, so the new primary key would be

<id, dateField>

How can i map this to hbm.xml files, without defining a new class ?

I've seen the <composite-id>, but i can't find how to keep the id field being auto-generated ..

Thanks all !

mmerder · **Posted:** Mon Nov 23, 2009 9:51 am

Hibernate Reference says:

Quote:

You cannot use an IdentifierGenerator to generate composite keys. Instead the application must assign its own identifiers.

josetesan · **Joined:** Thu Nov 19, 2009 5:38 am **Posts:** 4

mmerder wrote:

Hibernate Reference says:

Quote:

You cannot use an IdentifierGenerator to generate composite keys. Instead the application must assign its own identifiers.

Great :-(
So, there's no way to add a field to a primary key already being auto-generated ?

mmerder · **Posted:** Mon Nov 23, 2009 11:24 am

Not if you want hibernate to generate the schema. You can still go to your db and update it manually, which would not make much sense though.