CenterForOpenScience/modular-odm — pull request #79 by felliott (2014-03-03 00:18:45+00:00)
Title: get $not working on mongo via $nor

* modular-odm's "not" wasn't working on MongoDB, because their $not op
cannot modify an equivalence like {a: "foo"}, and no $eq op is
available. Thankfully, they provide $nor and boolean logic dictates
that (A $nor A) == ($not A).

* remove comment documenting this failure from test_logical_operators