2 Replies Latest reply on Jul 21, 2006 5:28 AM by jactor

Persisting

jactor Jul 21, 2006 4:14 AM

I am trying to develop a entity which extends another entity and which use the annotation @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS), but this only provides an exception as the sub class does not have an @Id annotated:

org.hibernate.MappingException: Cannot use identity column key generation with <union-subclass> mapping for: concept.entity.Entity

However: If I do annotate this @Id, I get this one:

org.hibernate.AnnotationException: Unable to define/override @Id(s) on a subclass: concept.entity.Entity

Suggestions?

1. Re: Persisting

jactor Jul 21, 2006 4:45 AM (in response to jactor)

I had the idea that @Inheritance(strategy = InheritanceType.TABLE_PER_CLASS) would give a new table with every field from the sub classes and mother class in this table. I searched the final draft on persistence after this notation but I came up with no suitable instances found.

Is this assumption of the strategy correct or (especially since this is not working) is it another way of doing this?
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2. Re: Persisting

jactor Jul 21, 2006 5:28 AM (in response to jactor)

I found a forum which is more suited for this question and created a new thread there: http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3959842#3959842.
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