SQLAlchemy supports multi-column primary keys, but doesn't support their 'mirror
image' of multi-column foreign keys. I was just about to write up a ticket, but
thought I would check to make sure I hadn't missed anything (esp. in light of
the large amount of recent activity!).
Adding support for this is likely to impact a few areas (esp mapping) as the
current assumption of a 1-1 mapping between column and fk is no longer valid in
all cases. Note that SQLAlchemy is currently working well for me when using 2
sets of multi-column fk's in an association, if the fk's are manually created
and the required joins fully specified in the mapper.
Robert
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