subdomain-example.rb

# -*- encoding : utf-8 -*-
class Subdomain
  def self.matches?(request)

    case request.host
    when Setting.host, "www.#{Setting.host}", nil
      false
    else
      true
    end  
  end

end

  constraints(Subdomain) do
    get '/' => 'posts#index'
    
   
    resources :posts do
      collection do
        get :search
      end
    end

  end