class Invoice < ActiveRecord::Base
  
  belongs_to	:invoice_type
	has_many 	  :invoice_items
	has_many 	  :invoice_party_roles
	has_many	  :parties, :through => :invoice_party_roles
	
	#This line of code connects the invoice to a polymorphic payment application.
	#The effect of this is to allow payments to be "applied_to" invoices
  has_many    :payment_applications, :as => :payment_applied_to

  alias :items :invoice_items
  alias :type :invoice_type
  alias :party_roles :invoice_party_roles
	
end