The code below produces the error message below. How do I tell SQLAlchemy
that the inheritance join condition should be b.id == a.id rather than
b.parent_a_id
== a.id? (I would think the primary_key=True could be a hint...) I can't
figure it out from the documentation.
class A(Base):
__tablename__ = 'a'
id = Column(Integer, primary_key=True)
class B(A):
__tablename__ = 'b'
id = Column(Integer, ForeignKey('a.id'), primary_key=True)
parent_a_id = Column(Integer, ForeignKey('a.id'))
sqlalchemy.exc.AmbiguousForeignKeysError: Can't determine join between 'a'
and 'b'; tables have more than one foreign key constraint relationship
between them. Please specify the 'onclause' of this join explicitly.
Thanks,
Seth
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