Rails - Apr 2011 - Problem w/ routing constraints

Hello,
   I am having a strange problem w/ rails 3 routing constraints.   I
have this custom class w/ a self.matches? method as such:

[code]
class PersonalizedDomain

  def self.matches?(request)
    Rails.logger.info("self.matches? NEVER CALLED!!!!")
  end

[/code]


and in routes I use the custom Class like this:

[code]
  constraints(PersonalizedDomain) do

     Rails.logger.info("constraints block ENTERED")
      root :to => "projects#show"
  end
[/code]

The self.matches?(request) method never gets called and I don''t
understand why?

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SOLUTION:  Here''s an update - I did figure out why my custom constraint
wasn''t working correctly and here''s the changes I made:

In PersonalizedDomain I changed the self.matches? method from a class 
method to an instance method as such:

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

and in routes I did this:

[code]
constraints(PersonalizedDomain.new) do
      resources :posts
      resources :personalized
  end
[/code]

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