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class Car < ActiveRecord::Base
has_many :bulbs
has_many :tyres
has_many :engines
has_many :wheels, :as => :wheelable
scope :incl_tyres, includes(:tyres)
scope :incl_engines, includes(:engines)
scope :order_using_new_style, order('name asc')
scope :order_using_old_style, :order => 'name asc'
end
class CoolCar < Car
default_scope :order => 'name desc'
end
class FastCar < Car
default_scope order('name desc')
end
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