Hi,

I have an abstract base class that contains a many-to-many association. However, in one of my subclasses, I need to change this association to a one-to-many as I have extra data that I need to store along with each associated object.

Am I able to easily override this? How would I change the mapping in the joined-subclass element so that it gets overridden with the new type of association?

I tried just re-declaring the association in the mapping file but then I got a "Found shared references to a collection" exception.

Am I tackling this in the right way or is there a better way to handle this?

Thanks,

Jason

Well one strategy would be to ditch the abstract class and use an interface instead. Then, using a mapping file for each class that implements the interface you would be able to declare that association appropriately. However, I realize this method looses the effeciencies of the abstract class. I'd be interested to see what ideas others have here.

-devon

Thanks Devon...this is an idea that I hadn't considered.

There is an awful lot of stuff in the abstract class that is common for all of the subclasses so I don't want to ditch it entirely. I could however create an interface for just this association and then implement that independantly in each subclass.

Will be interested to see any alternative options too although this is looking pretty good so far.

Cheers,

Jason