There is a section in the SQLAlchemy docs that deals with this:
https://docs.sqlalchemy.org/en/13/orm/examples.html#module-examples.generic_associations
The first three examples in that section use different table
structures so that you can use proper database-level foreign keys to
maintain
Suppose I have two distinct and unrelated ORM classes, call them Powers,
and Dominions (which are in tables "powers" and "dominions", both having an
"id" field), and I want them both to have relationships to their own
subclass of a single-table polymorphic setup, call it Things.
class
