zammad/app/models/concerns/checks_latest_change_observed.rb

# Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/
module ChecksLatestChangeObserved
  extend ActiveSupport::Concern

  included do
    after_commit :latest_change_set_from_observer
  end

  def latest_change_set_from_observer
    latest_change = destroyed? ? nil : updated_at
    self.class.latest_change_set(latest_change)
  end
end