gistfile1.txt

class TransactionAccount < ActiveRecord::Base
  composed_of :balance, :class_name => "Money", :mapping => [%w(cents account_balance_cents), %w(currency currency) ]

  belongs_to :user
  has_many sent_transactions,     :class_name => "TransactionItem",
                                  :foreign_key => "transaction_sender_account_id"
  
  has_many received_transactions, :class_name => "TransactionItem",
                                  :foreign_key => "transaction_receiver_account_id"
end