gistfile1.rb

class User < ActiveRecord::Base
  
  ROLES = %w(admin user guest).freeze
  
  acts_as_authentic
  acts_as_authorization_subject
  
  validates_presence_of :login, :email
  
  belongs_to :creator, :class_name => "User"
  
  attr_protected :creator
  
  def role
    ROLES.detect { |role| self.has_role?(role) }
  end

  def admin?
    !!(role =~ /admin/)
  end
  
  def deliver_password_reset_instructions!
    reset_perishable_token!
    Notifier.deliver_password_reset_instructions(self)
  end
    
end