On Thu, 21 May 2015, Mike Bayer wrote:

I think the best use case is to put it on both, using back_populates.
This is the focus of current documentation:
http://docs.sqlalchemy.org/en/rel_1_0/orm/backref.html

It's more verbose but I think it's clearer and functionally this is what backref does behind the scenes in any case.

Mike,

  OK. I'm carefully working through the ORM tutorial and cleaning code as I
go.

Thanks,

Rich

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