after_validation

# File activemodel/lib/active_model/validations/callbacks.rb, line 39
        def after_validation(*args, &block)
          options = args.extract_options!
          options[:prepend] = true
          options[:if] = Array.wrap(options[:if])
          options[:if] << "!halted"
          options[:if].unshift("self.validation_context == :#{options[:on]}") if options[:on]
          set_callback(:validation, :after, *(args << options), &block)
        end