Experiments with Module Includes in Ruby

include-experiments.rb

# I created a generic Rails like ApplicationController so that you can just 
# run this code via a command line prompt without the need for Rails


module Recorder
  
  def self.included(base)
    base.send(:before_filter, :some_method)
    base.send(:after_filter, :another_method)
  end
  
  def initialize
    super
    #self references the instance of the UsersController class
    @model_class = self.class
    puts @model_class # UsersController
  end
  
  def some_method
    puts 'from before filter method'
    puts @model_class # UsersController
  end
  
  def another_method
    puts 'from after filter method'
    puts @model_class # UsersController
  end
  
end

class ApplicationController

  #stubbing out some stuff
  @@before_filters = []
  @@after_filters = []  
  
  def self.before_filter(method)
    @@before_filters << method
  end
  def self.after_filter(method)
    @@after_filters << method
  end
  
  def run(filter)
    self.class.class_variable_get(('@@'+filter).intern).each do |method|
      send(method)
    end
  end
  
  include Recorder
end

class UsersController < ApplicationController; end


controller = UsersController.new

controller.run("before_filters")

controller.run("after_filters")

The stubbing thingies shades the purpose of this class, to teach how to include, is not newbie friendly :(
I would sacrifice the ability to run via command line prompt for the sake of clarity.