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Hibernate version:2.1.7

Hi there. When I have an pojo with a version attribute. And this pojo is used by another pojo in a many-to-one association. Do I need to load the entire object before associating it with the parent object?

For eg.

Car has an Engine

When creating a new car with the following code:

Hibernate tries to persist the engine pojo, even this engine (ID=1) exists on the table. Now if I have:


Works just fine. Must hibernate fetch the entire object when using versioning? Is there a workaround?

I'm using a timeStamp as versioning

Thanks all

If the child is lazy class loadable then you can use session.load to generate a proxy (without hitting the database) and associate it with the parent.

Else, there's no other way right???

Don't forget you can use the various cache levels to reduce database hits for objects. Alternatively, you could use native SQL or JDBC but, in this case, why use an ORM.