Declarative Auth Role Ancestor hierarchy

role.rb

class Role < ActiveRecord::Base
  require 'declarative_authorization/development_support/analyzer'

  has_many :assignments
  has_many :users, :through => :assignments

  validates :name, :presence => true
  validates :name, :uniqueness => true

  def ancestors
    Authorization::DevelopmentSupport::AnalyzerEngine::Role.for_sym(self.name.to_sym, 
      Authorization::Engine.instance).ancestors.map { |r| r.instance_variable_get("@role") }
  end

  def self_and_ancestors
    ancestors << self.name.to_sym
  end
end