Hi,

I have difficulties in adding transient objects into a Set... can someone shed some light on what I'm missing. :)

To begin with, my transient objects have the same null identifier (please correct me if I'm wrong in doing so). Consequently these transient objects are deemed to be equal by a Set. Hence there's no way for me to add more than 1 transient objects to the same Set as only the first addition will be effective.

The last code example in section 8.2 of the Hibernate docs is a good illustration. How do I add 2 Children to the Parent at one go? My code fragment below manages to add only 1 Children:

Thanks in advance! :)

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chyun

That's not a Hibernate-specific issue: If you want to put more than one new domain object into a HashSet or HashMap, you need to implement their equals/hashCode accordingly: Two new domain objects are never equal, just two *persisted* domain objects with the same non-null id are. Or don't override equals/hashCode at all.

Juergen

Hi jhoeller,

Thanks for your reply.

I'm using hbm2java to generate the model classes, and both equals() and hashCode() methods are generated automatically. I'll see if I can turn that off.

Thanks. :)

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chyun