Rendered

application.html.erb

<%= javascript_include_tag :defaults %>

application.rb

require File.expand_path('../boot', __FILE__)

require 'rails/all'

Bundler.require(:default, Rails.env) if defined?(Bundler)

module Comfy
  class Application < Rails::Application
   ...
    config.action_view.javascript_expansions[:defaults] = %w(jquery rails)
   ...
  end
end

development.rb

Comfy::Application.configure do
  ...
  config.action_view.javascript_expansions[:defaults] = %w(jquery rails)
end

Gemfile

source 'http://rubygems.org'

gem 'rails', '3.0.4'
gem 'mysql2'
gem 'jquery-rails'
...

gistfile1.txt

<script src="/javascripts/prototype.js" type="text/javascript"></script>
<script src="/javascripts/effects.js" type="text/javascript"></script>
<script src="/javascripts/dragdrop.js" type="text/javascript"></script>
<script src="/javascripts/controls.js" type="text/javascript"></script>
<script src="/javascripts/rails.js?1300993290" type="text/javascript"></script>
<script src="/javascripts/application.js?1300995428" type="text/javascript"></script>