On Jun 6, 11:32 pm, Michael Bayer <[email protected]> wrote:
>
> The table referenced by "secondary=" in a relationship() is managed entirely,
> regardless of cascade setting, but
> only from the perspective of the parent. Meaning if A references a
> collection of B, the row in a_to_b will be
> deleted if you 1. delete A, or 2. remove a B from A's collection. Deleting
> a B by itself as in session.delete(B)
> won't have an effect unless you apply a backref to the relationship so that
> each B also knows about its collection
> of A.
I am indeed deleting B but in this case I do have the backref
specified in the parent table A e.g.
Class A(Base):
toB = relationship('B', secondary=a_b, backref='toA')
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