Rails - Sep 2005 - Reloading and redefining methods: infinite recursion

When I redefine a method like this

class Klass
  alias_method :method_without_addition, :method
  def method_with_addition
    ...
    method_without_addition
    ...
  end
  alias_method :method, :method_with_addition
end

I get into trouble in the development environment. As these definitions 
are executed again for each request, the second time around 
method_without_addition is actually the same as method_with_addition 
and when called dies in an infinite recursion stack overflow.

I though something like this would help, but apparently it does not

class Klass
  unless method_defined?(:method_with_addition)
    alias_method :method_without_addition, :method
    def method_with_addition
      ...
      method_without_addition
      ...
    end
    alias_method :method, :method_with_addition
  end
end

It gives a stack overflow just the same. How do I make this work?

Michael

-- 
Michael Schuerig                   The Fifth Rider of the Apocalypse
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org         is a programmer.
http://www.schuerig.de/michael/