MongoMapper and bson_ext problem

Question

I can\'t get MongoMapper to work with my Rails app. I get this error message:

**Notice: C extension not loaded. This is required for optimum MongoDB Ruby driver performa

Answer 1

I needed specify the bson version to get this to work, like so:

gem 'mongo', "1.1"
gem 'bson', "1.1"
gem 'bson_ext', "1.1"

(Using rails 3)