One interface for both MongoDB and Google BigTable in Ruby

Is there any interface or "mapping" stack, that works fine with both MongoDB and BigTable from GA开发者_如何学运维E? I'd prefer document-oriented one.

I know theres DataMapper with plugins (or providers) for both but I dont think these can be considered as stable. And DataMapper is also relation-database oriented.

Is there anything?

i don't know about ruby, but django-nonrel is a well-regarded project that does this in python. the current backends i know of are mongo, the gae datastore, simpledb, and cassandra. there are probably others out there too.