Fixed bug where we were returning a string, not the actual key.
So interesting note-
JS, and Mongo like it, don't really differentiate between a int and a Float.

Mongo introduces some helper classes to force it into one or the other while it's in BSON.

Right now, we're not supporting those, but it's worth looking into.
In the meantime, though, keep in mind that Postgres might return "2", where as Pymongo might return "2.0" for the same query.