Polymorphic_Test.rb

class Widget < ActiveRecord::Base
  has_one :framework
end

class Framework < ActiveRecord::Base
  belongs_to :widget
  has_one :detail, :polymorphic => true
end

class InformationalFramework < ActiveRecord::Base
  belongs_to :framework, :as => :detail
end

class OneWayCommunicationFramework < ActiveRecord::Base
  belongs_to :framework, :as => :detail
end