Association Change.

association_change.rb

#First Pass:

module AR
	class Guest < ActiveRecord::Base
		has_and_belongs_to_many :drinks
	end
end

module AR
	class Drink < ActiveRecord::Base
		has_and_belongs_to_many :guests
	end
end

module AR
	class Orders < ActiveRecord::Base
		#empty
	end
end

#Second Pass:

module AR
	class Guest < ActiveRecord::Base
		has_many :orders, class_name: "Orders"
		has_many :drinks, through: :orders, class_name: "Orders"
	end
end

module AR
	class Drink < ActiveRecord::Base
		has_many :orders, class_name: "Orders"
		has_many :drinks, through: :orders, class_name: "Orders"
	end
end

module AR
	class Orders < ActiveRecord::Base
		belongs_to :guests, class_name: "Guests"
		belongs_to :drinks, class_name: "Drinks"
	end
end

# Track how many drinks each guest ordered.

module AR
	class Guest < ActiveRecord::Base
		has_many :orders, class_name: "Orders"
		has_many :drinks, through: :orders, class_name: "Orders"
		def drinks			
			drinks_array = []
			AR::Orders.all.each do |relationship|
		 	  if relationship.guest_id == self.id
		 		  drinks_array << relationship.drink 
		 	  end
		 end
		 drinks_array
		end
	end
end

# Refactor Code Smells.  

module AR
	class Guest < ActiveRecord::Base
		has_many :ordes, class_name: "Orders"
		def drinks			
			AR::Orders.where("guest_id = ?", self.id).map do |relationship|
				relationship.drink			
			end
		end
	end
end