Hi! In the FAQ there's entry titled "I’m getting a warning or error about “Implicitly combining column X under attribute Y”" with the following example:
class A(Base): __tablename__ = 'a' id = Column(Integer, primary_key=True) class B(A): __tablename__ = 'b' # probably not what you want, but this is a demonstration id = column_property(Column(Integer, primary_key=True), A.id) a_id = Column(Integer, ForeignKey('a.id')) However trying to add yet another class just to see what happens... class C(B): __tablename__ = 'c' id = column_property(Column(Integer, primary_key=True), B.id) b_id = Column(Integer, ForeignKey('b.id')) ...results in the same kind of error again: "sqlalchemy.exc.InvalidRequestError: Implicitly combining column b.id with column a.id under attribute 'id'. Please configure one or more attributes for these same-named columns explicitly." How to avoid this? ps. This is a follow-up to my recent post https://groups.google.com/forum/#!topic/sqlalchemy/n_JEgKYshnE -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.