error_messages_for

めも。

      #   error_messages_for 'user'
      #
      # To specify more than one object, you simply list them; optionally, you can add an extra +object_name+ parameter, which
      # will be the name used in the header message.
      #
      #   error_messages_for 'user_common', 'user', :object_name => 'user'
      #
      # If the objects cannot be located as instance variables, you can add an extra +object+ paremeter which gives the actual
      # object (or array of objects to use)
      #
      #   error_messages_for 'user', :object => @question.user