A means of enforcing attributes on a given class.

requirable.rb

module Requirable
  def self.included(base)
    required_attributes.each do |key,val|
      raise NoMethodError, "'#{key}' is not defined on #{self.inspect}"
    end
  end

  cattr_accessor :required_attributes

  def self.attr_required(*attributes)
    self.required_attributes = attributes
  end
end

class Model
  include Requirable
  attr_required :name, :description
end