Hello!
I want to introduce an artificial root object into my model to obtain
a traversable container hierarchy:
class Root:
foos = []
bars = []
Foo and Bar are both mapped classes and I had hoped to be able to do
something like
mapper(Root,
properties=dict(foos=relation(Foo),
Hello!
From reading the docs, I assumed that using backref on the child's
orm.relation declaration in a 1:n relationship is equivalent to using
back_populates with explicit orm.relation declarations on both ends.
However, it turns out that I get double insertions when using
back_populates - so,
On Oct 16, 12:50 pm, Michael Bayer mike...@zzzcomputing.com wrote:
On Oct 16, 2009, at 4:43 AM, fogathm...@googlemail.com wrote:
Hello!
From reading the docs, I assumed that using backref on the child's
orm.relation declaration in a 1:n relationship is equivalent to using
On Oct 16, 5:18 pm, Michael Bayer mike...@zzzcomputing.com wrote:
fogathm...@googlemail.com wrote:
Ah, thanks, that makes sense. So I was wrong in assuming the two forms
were equivalent - backref merely allows you to access a relation from
the other side, whereas back_populates performs
