Polluting the namespace like metawhere does is a significant problem.
We use datamapper on our app, and were looking at doing some of our analytics on mongo at one point, but since both mongomapper and datamapper both define 'helper' methods on Symbols, they can't both be in use at the same time.
If we _really_ wanted to use mongo it would need to be from a completely separate codebase either talking to the db via Sequel or something, or talk to our main app via REST calls - neither being a particularly pleasant solution.
We use datamapper on our app, and were looking at doing some of our analytics on mongo at one point, but since both mongomapper and datamapper both define 'helper' methods on Symbols, they can't both be in use at the same time.
If we _really_ wanted to use mongo it would need to be from a completely separate codebase either talking to the db via Sequel or something, or talk to our main app via REST calls - neither being a particularly pleasant solution.