Rails 3 tableless model implementation

tabless.rb

# based on a Ryan Bates article http://railscasts.com/episodes/219-active-model

class Tableless
  
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming
  
  def self.attr_accessor(*vars)
    @attributes ||= []
    @attributes.concat( vars )
    super
  end
  
  def self.attributes
    @attributes
  end
  
  def initialize(attributes={})
    attributes && attributes.each do |name, value|
      send("#{name}=", value) if respond_to? name.to_sym 
    end
  end
  
  def persisted?
    false
  end
  
  def self.inspect
    "#<#{ self.to_s} #{ self.attributes.collect{ |e| ":#{ e }" }.join(', ') }>"
  end
  
end