# File lib/dragonfly/data_storage/mongo_data_store.rb, line 36
      def store(temp_object, opts={})
        ensure_authenticated!
        content_type = opts[:content_type] || opts[:mime_type] || 'application/octet-stream'
        temp_object.file do |f|
          mongo_id = grid.put(f, :content_type => content_type,
                                 :metadata => marshal_encode(temp_object.meta))
          mongo_id.to_s
        end
      end