method_missing

# File activerecord/lib/active_record/associations/association_collection.rb, line 366
        def method_missing(method, *args)
          if @target.respond_to?(method) || ([email protected]_to?(method) && Class.respond_to?(method))
            if block_given?
              super { |*block_args| yield(*block_args) }
            else
              super
            end
          elsif @reflection.klass.scopes.include?(method)
            @reflection.klass.scopes[method].call(self, *args)
          else          
            with_scope(construct_scope) do
              if block_given?
                @reflection.klass.send(method, *args) { |*block_args| yield(*block_args) }
              else
                @reflection.klass.send(method, *args)
              end
            end
          end
        end