MongoMapper – undefined method 'reflect_on_association'

Information Tidbit: If you’re using reflection_on_association with ActiveRecord and need to use it with MongoMapper, here is what you want to do: undefined method `reflect_on_association' for User:Class ActiveRecord: User.reflect_on_association(:posts).klass.new MongoMapper: User.associations[:posts].klass.new Mongoid: User.associations['posts'].klass.new notice the posts is a string, it will not work with a symbol UPDATE – (Apr 2011) Mongoid now follows...