From: Ryan Davis <ryand-ruby@...>
Date: 2013-08-01T06:25:36+09:00
Subject: Re: Method tracker - Need assistance


On Jul 31, 2013, at 13:44 , Kenny Meyer <kenny@kennymeyer.net> wrote:

> I would like to write an includable method tracker, which logs about added methods to a class.
> 
> module MethodTracker
>   def self.method_added(method_name)
>     puts "Tracking #{method_name}"
>   end
> end
> 
> class Factory
>   include MethodTracker
> 
>   def build
>   end
> end
> 
> This is my code, however when the `Factory` class is defined there is no message shown. Can you give me a hint?

method_added is a class method, so you need to extend Factory, not include.

module MethodTracker
  def method_added(method_name)
    puts "Tracking #{method_name}"
  end
end

class Factory
  extend MethodTracker

  def build
  end
end