From: Michael Neumann <mneumann@...>
Date: 2005-04-06T05:25:00+09:00
Subject: Re: Nitro + Og 0.15.0, Localization, Parametrized mixins, Morphing, SQLServer

Am Dienstag 05 April 2005 22:19 schrieb George  Moschovitis:
> Does it allow duck-typing?
>
> > class Posting
> >   ...
> >   has_many :responses, [Approval, Disapproval]
> > end
>
> I cannot understand what you mean. Can you please explain this a little
> better?

"Syntax-sugar" for:

  class Posting

    has_many :approval_responses, Approval
    has_many :disapproval_responses, Disapproval

    def responses
      self.approval_responses + self.disapproval_responses
    end

    def add_response(r)
      case r
      when Approval
        add_approval_response(r)
      when Disapproval
        add_disapproval_response(r)
      else
        raise
      end
    end

  end

And if you could hide the meta for the :approval_responses 
and :disapproval_responses, this would be even better.

Regards,

  Michael