Interface pattern for Single Table Inheritance model in Rails

interface_driver.rb

# An example driver with multiple implementations
#
# Allows documentation on the parent class while implementing functionality on the child classes.
# Raises a NoMethodError if the child class does not implement a documented method
class InterfaceDriver < ActiveRecord::Base
  self.inheritance_column = :type 
  
  def abstract( method ) #:nodoc:
    raise NoMethodError.new("undefined abstract method `#{method}' called for InterfaceDriver <#{self.class}:#{self.id}>")
  end

  # Performs Some Action using the appropriate driver
  #
  # === Examples
  #    FacebookDriver.first.do_something
  #    GoogleDriver.first.do_something
  #    InterfaceDriver.where(type: 'FacebookDriver').first.do_something
  #    InterfaceDriver.new.do_something # => NoMethodError
  def do_something
    abstract( __method__ )
  end
  
end

class GoogleDriver < InterfaceDriver 
  
  def do_something
    # code to do something on Google 
  end

end

class FacebookDriver < InterfaceDriver 
  
  def do_something
    # code to do something on Facebook 
  end
  
end