Thanks, Jonathan and Simon.
With its seamless query support, association_proxy looks perfect for my
needs: it's just like having the extra fields on the master table, which is
where I'd put them ideally if not for some pathological technical issues.
I'm going to use it.
Thanks, D.
On
I have a declarative base called Foo, instances of which get most of their
attributes from a Foo SQL table. However, Foo also has a bar_id attribute,
which is a foreign key linking to the primary key of a Bar table. Bar is
really just an extension of Foo, with a few extra attributes that belong
