http://hooopo.iteye.com/blog/1013107

Ruby Method_Missing

[root@solife tools]# ruby method_missing.rb 
method missing stack called..
define_method: title
"title"
"title"
no mater what you do, i say: hello
[root@solife tools]# cat method_missing.rb 
class A
  def method_missing(method_id, *args)
    puts "method missing stack called.."
    if  method_id.to_s =~ /^find_by_(.*?)$/ 
      name = $1
      puts "define_method: " + name
      self.class.send(:define_method, method_id) do
        name
      end
      send(method_id, *args)
    else
      super
    end
  end
end

class Object
  def method_missing(method_id, *args)
    puts "no mater what you do, i say: " + method_id.to_s
  end
end
obj = A.new
p obj.find_by_title
p obj.find_by_title                     

1.hello