Hello everyone,
I've got a 1:1 Association, like a Customer and its Address. In the object model, the
Address should be navigable from the Customer, but not the other way round.
The existing database model has got a customer_id foreign key pointing from the
Address to the primary id of the Customer, instead of the maybe more usual approach of
pointing an address_id foreign key from the Customer to the primary id of the Address.
This should be no problem, because when navigation in the object model from the
Customer to its Address, in both cases there is only one simple select statement
needed to find the associated Address.
Unfortunately however, I did not find out how to define the association with an
"inverse foreign key" in the ODMG descriptor ("repository_user.xml").
According to the repository.dtd, the reference descriptor element only allows
foreignkey sub-elements but not inverse-foreignkey sub-elements. The
inverse-foreignkey element can only be child of a collection-descriptor, but that is
not what I want (1:1 associations have no need for a collection).
Is there anything I can do in order to allow this?
Regards,
Andreas
BTW: With EJB Entity Beans and JBoss this "decoupling" of the data model navigation
direction from the direction of the foreign key is possible.
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