From: Joshua Muheim <forum@...>
Date: 2007-11-22T22:00:26+09:00
Subject: Developing Rails plugin: need some metaprog. help

Hi all

I'm developing an authorization plugin that looks like the following so
far:

module Incense
  module Authorization
    def self.included(base_class)
      base_class.extend(ClassMethods)
    end

    module ClassMethods
      def performs_authorization(options = {})
        before_filter :prepare_user

        include(InstanceMethods)
      end
    end
  end

  module InstanceMethods
    private
    def prepare_user
      session[:user] ||= Member.find_by_id(2) # When there's no user_id
in the session, then use #2 for Guest
    ...
  end

Because I extracted this functionality from an application, in
prepare_user() there's still a hardwired "Member" model used. But in
another application I need this to be a "User" model, so I'd like to be
able to specify the model to use in the options hash of the
performs_authorization() method. So how can I achieve this? Do I have to
use define_method() in the context of performs_authorization? This would
work, I guess, but I don't like it very much... Isn't there another way?

Thanks
Josh
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