Hi Jörg, On May 7, 2009, at 9:36 AM, Joerg von Frantzius wrote:
Hi, in the XML metadata, it is possible to have multiple FCO fields, e.g. B.a1 and B.a2, with identical mapped-by pointing to the same field of the same related class, e.g. A.b. In effect this would theoretically mean that the FK should be shared among different associations in the object model. I don't think that this does make much sense.
I agree.
Also it is possible to declare two fields in two different classes, e.g.B1.a and B2.a, with the identical mapped-by pointing to the same fieldof the same related class, e.g. A.a. That would mean that in theory two FKs would have to be created for the same column, pointing to differenttables. That neither seems to make sense to me.
I agree.
Should the implementation throw an error in such situations, warning theuser of the erroneous metadata?
Yes. Craig
Regards, Jörg -- ____________________________________________________________________ artnology GmbH - Milastraße 4 - 10437 Berlin - Germany Geschäftsführer: Ekkehard Blome (CEO), Felix Kuschnick (CCO) Registergericht: Amtsgericht Berlin Charlottenburg HRB 76376 UST-Id. DE 217652550
Craig L Russell Architect, Sun Java Enterprise System http://db.apache.org/jdo 408 276-5638 mailto:craig.russ...@sun.com P.S. A good JDO? O, Gasp!
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