Rails controller before/after shortcuts (ruby 1.9.2 compatible)

application_controller.rb

class ApplicationController < ActionController::Base
  extend Filterable

  after_update -> { user.clear_cache! }
end

filterable.rb

module Filterable
  [:after, :before].each do |context|
    [:index, :show, :new, :create, :update, :destroy].each do |action|
      define_method "#{context}_#{action}", ->(filter, options = { }, &block) do
        send "#{context}_filter", filter, options.merge!(:only => action), &block
      end
    end
  end
end