default_actions.rb

module InheritedResources
  module DefaultActions
    def self.included(base)
      base.send :extend, ClassMethods
    end

    module ClassMethods
      def default_actions(*actions_to_keep)
        options = actions_to_keep.extract_options!
        actions_to_keep.map!(&:to_sym).uniq!
        actions_to_keep = ACTIONS if actions_to_keep.first == :all
        actions_map = { :update => :edit, :create => :new }


        actions_to_keep.each do |action|
          if actions_map.has_key?(action) 
            method = "#{action}! {|success, failure| failure.html {render 'resource/#{actions_map[action]}'}} "
          else  
            method = "#{action}! {|format| format.html {render 'resource/#{action}'}}"
          end

          class_eval "def #{action}; #{method};end"
        end
      end
    end
  end
end