zammad/app/models/group.rb

# Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/

class Group < ApplicationModel
  has_and_belongs_to_many  :users,         :after_add => :cache_update, :after_remove => :cache_update
  belongs_to               :email_address
  belongs_to               :signature
  validates                :name, :presence => true

  activity_stream_support  :role => 'Admin'
  history_support
end