Subdomains and Domains in Rails 3.0

domain.rb

class Domain
  def self.matches?(request)
    # ROOT_DOMAIN is a configurable value so we don't catch skip www.kickofflabs.com 
    request.host.downcase != KickoffLabs::ROOT_DOMAIN 
  end
end

routes.rb

constraints(Subdomain) do
   get "/" => "public_sites#show_subdomain"
end

constraints(Domain) do
   get "/" => "public_sites#show_domain"
end

specs.rb

describe 'Custom Domains' do

  context 'Marketing Site' do
    it "should route #{KickoffLabs::ROOT_DOMAIN} to the home controller" do
      {:get => "http://#{KickoffLabs::ROOT_DOMAIN}"}.should route_to(:controller => 'info', :action => 'home')
    end
  end

  context 'Subdomains' do

    it "should route sub.example.org to the public_sites#show" do
      {:get => 'http://sub.example.org'}.should route_to(:controller => 'public_sites', :action => 'show_subdomain')
    end
    
  end

  context 'Domains' do

    it "should route customdomain.com to the public_sites#show_domain" do
      {:get => 'http://customdomain.com'}.should route_to(:controller => 'public_sites', :action => 'show_domain')
    end

  end

end

subdomain.rb

class Subdomain
  extend  UrlHelper
  def self.matches?(request)
    # want to make sure we only catch our own (KickoffLabs domain) and ignore our own www.
    request.domain.downcase == clean_root_domain  && request.subdomain.present? && request.subdomain != "www"
  end
end