Globalize with after_add and after_remove callbacks

globalize_with_callbacks.rb

module GlobalizeWithCallbacks
  extend ActiveSupport::Concern

  class_methods do
    # It is Globalize's #translates method with #after_add and #after_remove
    # callbacks on :translations table. It may be used to run elasticsearch
    # multilingual indexing.
    #
    # Define #after_translation_add and #after_translation_remove methods in
    # the included class
    def translates_with_callbacks(*attr_names)
      translates(*attr_names)
      options = attr_names.extract_options!

      has_many :translations, :class_name   => translation_class.name,
                              :foreign_key  => options[:foreign_key],
                              :dependent    => :destroy,
                              :extend       => Globalize::ActiveRecord::HasManyExtensions,
                              :autosave     => true,
                              :after_add    => :after_translation_add,
                              :after_remove => :after_translation_remove
    end
  end
end