Access Rails routes from outside of controllers/views. Most rules have exceptions, folks.

MVC_what_now.rb

class CanHazRoutes
  include ActionController::UrlWriter

  host = case ENV['RAILS_ENV']
    when "production"
      "prod.com"
    when "staging"
      "stage.com"
    when "development"
      "app.local"
  end
  default_url_options[:host] = host

  def url_kthx(m)
    polymorphic_url_for(m)  
  end
end