Inheriting attr_accessible roles

class User < ActiveRecord::Base

  # Original
  attr_accessible :name, :email
  attr_accessible :name, :email, :location, :as => :location
  attr_accessible :name, :email, :location, :admin, :as => :admin

  # OR

  # Tenderlove style
  attr_accessible :name, :email
  role :location => [:default] do
    attr_accessible :location
  end
  role :admin => [:default, :location] do
    attr_accessible :admin
  end

  # OR

  # My style
  attr_accessible :name, :email
  attr_accessible :name, :email, :location, :as => :location, inherits: [:default]
  attr_accessible :name, :email, :location, :admin, :as => :admin, inherits: [:default, :location]

end

Oops sorry the last style's inherits arg is using Ruby 1.9 syntax, while the rest is Ruby 1.8