zammad/app/models/group.rb

# Copyright (C) 2012-2013 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
end