MongoId translates

translate.rb

module Adriano
  module Translate
    extend ::ActiveSupport::Concern

    module ClassMethods
      attr_accessor :translated_fields

      def translates(*args)
        self.translated_fields = *args

        I18n.available_locales.each do |locale|
          translated_fields.each do |field|
            define_method "#{field}_#{locale}" do
              read_translation(field, locale)
            end

            define_method "#{field}_#{locale}=" do |value|
              write_translation(field, value, locale)
            end
          end
        end
      end
    end

    protected

    def read_translation(field, locale)
      hash = send("#{field}_translations")
      hash[field.to_s][locale.to_s] if hash && hash[field.to_s]
    end

    def write_translation(field, value, locale)
      hash = send("#{field}_translations")

      if hash && hash[field.to_s]
        hash[field.to_s][locale.to_s] = value

        send("#{field}_translations=", hash)
      end
    end

  end
end