Rails 3 Foreign Domain routing - cannot get this to work!

Rails
1

Hello,
I’m trying to build an app (mysuperapp.com) that allows users to
create an account in which a default subdomain (IE:
joeshmoe.mysuperapp.com) will be
created as their homepage. In their profile settings, I also want to
give them the ability to add their own domain name so their homepage now
can be joeshmoe.com. I know this is possible in rails w/ plugins like
subdomainfu and w/out plugins in rails3. I’ve searched countless
websites on the subject and I’m attempting to build an app based on this
example:

http://glac-ialis.postmodo.com/ (take out the hypen if you want to go
to this link - caused a spam alert)

so, as in this example, I’ve created lib/personalized_domain.rb

# lib/personalized_domain.rb
class PersonalizedDomain
  def self.matches?(request)
    case request.host
    when 'www.#{APP_CONFIG[:domain]}', '#{APP_CONFIG[:domain]}', nil
      false
    else
      true
    end
  end
end

and in my routes I have this:

# config/routes
constraints(PersonalizedDomain) do
  namespace :personalized, :path => '/' do
    root :to => "projects#show"
    resource :project
  end
end


root :to => "home#index"

in my model I have:

# app/models/project.rb
before_validation :cache_domain

validates_uniqueness_of :subdomain,
                        :cached_domain
validates_uniqueness_of :cname_alias,
                        :allow_blank => true
validates_presence_of   :subdomain,
                        :cached_domain
validates_exclusion_of  :subdomain,
                        :in => %w(admin blog),
                        :message => "is taken"

def cache_domain
  self.cached_domain = if self.cname_alias.blank?
    "#{self.subdomain}.#{APP_CONFIG[:domain]}"
  else
    "#{self.cname_alias}"
  end
end

as per the example, my base controller:

# app/controllers/personalized/base_controller.rb
class Personalized::BaseController < ApplicationController
  before_filter :get_project

protected
  def get_project
    @project = Project.first(:conditions => {
        :cached_domain => request.host
    })
  end
end

One thing I noticed, in PersonalizedDomain, was that if I put a debug
statement in the self.matches? method as such:

class PersonalizedDomain
  def self.matches?(request)
    Rails.logger.info("****(PersonalizedDomain::self.matches?)-->>APP_CONFIG[:domain]:
#{APP_CONFIG[:domain]}")
    case request.host
    when 'www.#{APP_CONFIG[:domain]}', '#{APP_CONFIG[:domain]}', nil
      false
    else
      true
    end
  end
end

the debug statement never get’s executed.

Thanks for any help