Rails Mobile web app setup

gistfile1.txt

Rails 3.2

1. In initializers/mime_types.rb

2. Detection of Mobile Device 

I put this is a file called mobile.rb in app/util
module Mobile
  #optional for testing
  TEST_MOBILE_DEV = false    #set true to test on browser
  MOBILE_PROD_OVERRIDE = false #test on browser in prod

  def mobile_device?
    mobileClient = request.user_agent =~ /Mobile|webOS/
    MOBILE_PROD_OVERRIDE or mobileClient or (TEST_MOBILE_DEV and !Site.production?)
  end

  def mobile
    request.format = :mobile if mobile_device?
  end
end

3. Controller before_filter

class ApplicationController < ActionController::Base
  protect_from_forgery
  ...
  before_filter :mobile
  helper_method :mobile_device?, :current_user
  ...

4. Views: application.mobile.haml (or application.mobile.html)