html5_form_helpers.rb

# put this file in config/initializers
module ActionView
  module Helpers
    module FormHelper
      %w(search email url number range date color).each do |type|
        selector = "#{type}_field"
        src = <<-end_src
          def #{selector}(object_name, method, options = {})
            InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("#{type}", options)
          end
        end_src
        class_eval src, __FILE__, __LINE__
      end
    end
    class FormBuilder
      %w(search email url number range date color).each do |type|
        selector = "#{type}_field"
        src = <<-end_src
          def #{selector}(method, options = {})  # def text_field(method, options = {})
            @template.send(                      #   @template.send(
              #{selector.inspect},               #     "text_field",
              @object_name,                      #     @object_name,
              method,                            #     method,
              objectify_options(options))        #     objectify_options(options))
          end                                    # end
        end_src
        class_eval src, __FILE__, __LINE__
      end
    end
  end
end