Rails 3 URL helpers anywhere

# This class gives you all the Rails 3 URL helpers, which are so
# unhelpfully unavailable in models, libraries, and unit tests
# Stick this in the library folder and get a URL with
# UrlHelpers.new.nameofmodel_url

class UrlHelpers
  include Rails.application.routes.url_helpers
  def initialize
    default_url_options[:host] = case Rails.env
    when "development" then "localhost"
    when "production" then "yourdomain.com"
    when "test" then "localhost"
    end
  end
end