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Problem many-to-many mapping

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broly27

Post subject: Problem many-to-many mapping

Posted: Wed Mar 19, 2008 8:30 pm

Newbie

Joined: Wed Mar 19, 2008 7:46 pm
Posts: 1

Hi I'm in a trouble since one week.
I have 3 tables, one of them is called:
USUARIO(id_usuario, nombre)
another is called
EXAMEN(id_examen, descripcion)
and the last one is
USUARIO_EXAMEN(id_usuario_examen, id_usuario, id_examen, calificacion)

So, this is a problem where many-to-many mappings plays. I've seen examples almost the same, BUT is it possible to have an independent primary id (not a compound key "id_usuario, id_examen")? How would be the mapping in the xml file. Do I need another java file (for example UsuarioExamen.java) because I need to put some other fields in the table USUARIO_EXAMEN?

Thanks hope you can help me

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farzad

Post subject: Re: Problem many-to-many mapping

Posted: Wed Mar 19, 2008 8:32 pm

Expert

Joined: Wed Apr 11, 2007 11:39 am
Posts: 735
Location: Montreal, QC

broly27 wrote:

Do I need another java file (for example UsuarioExamen.java) because I need to put some other fields in the table USUARIO_EXAMEN?

Yes you do. The relation has data and in these cases you need to define relation as an entity.

Farzad-

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