That's my point, foreign keys -do- work without problems even when you have
more than one declarative base. That is the only feature that I mean to
question. So my preferred SQLAlchemy style goes like so, with multiple
declarative_base() and never-bound metadata. It might be helpful to
remember that if you are using the ORM without declarative then you could
have zero declarative_base() instances.
DBSession = scoped_session(sessionmaker())
engine = create_engine(...)
DBSession.configure(bind=engine)
connection = DBSession.connection()
for base as (all declarative_base instances in dependency order):
base.metadata.create_all(connection)
# base.metadata.bind = no thanks
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