Calling the overriden method from the new implementation

monkey_patching.rb

  module Populator
    class Record
      # See http://stackoverflow.com/questions/4470108/when-monkey-patching-a-method-can-you-call-the-overridden-method-from-the-new-i
      old_initialize = instance_method(:initialize)
      define_method(:initialize) do |class_name, id|
        old_initialize.bind(self).(class_name, id)
        @class_name = class_name
      end

      def from_factory
        self.attributes = FactoryGirl.build(@class_name.to_s.downcase.to_sym).attributes.delete_if { |k, v| v.blank? }
      end
    end
  end