I started playing around with MongoMapper for MongoDB and I have to say I’m loving it! Somehow it just feels so much easier to work with. However, I did have an issue with my code and needed to see whether or not MongoMapper was looking for account_id in my model. Since there is no sql to look at, I was looking for a way to see what MongoMapper was sending to MongoDB. Luckily the answer was very simple, in your connection string you just have to do this:

MongoMapper.connection = Mongo::Connection.new('localhost', 27017, :logger => Rails.logger)

This little tidbit came from Zyph blog post