DataMapper 1.4 wtf

database.txt

cbs_development=# \d payment_informations
                                         Table "public.payment_informations"
          Column          |         Type          |                             Modifiers                             
--------------------------+-----------------------+-------------------------------------------------------------------
 id                       | integer               | not null default nextval('payment_informations_id_seq'::regclass)
 payment_method           | character varying(50) | 
 payment_amount           | numeric(10,2)         | 
 commission_by_percentage | boolean               | 
 commission               | numeric(10,2)         | 
 paid                     | boolean               | 
 booking_id               | integer               | not null
Indexes:
    "payment_informations_pkey" PRIMARY KEY, btree (id)
    "index_payment_informations_booking" btree (booking_id)
Foreign-key constraints:
    "payment_informations_booking_fk" FOREIGN KEY (booking_id) REFERENCES bookings(id)

payment_information.rb

class PaymentInformation

  include DataMapper::Resource
  property :payment_method,   String
  property :payment_amount,   Decimal,  :precision => 10, :scale => 2
  property :commission_by_percentage, Boolean #If true, commission is a %, else fixed fee.
  property :commission,       Decimal,  :precision => 10, :scale => 2
  property :paid,             Boolean #Marked as true once this has been paid

  belongs_to :booking

  validates_presence_of :payment_method, :payment_amount

end

pry output.txt

[17] pry(#<BookingsController>)> @booking.payment_information.valid?
=> true
[18] pry(#<BookingsController>)> @booking.payment_information.save
=> false
20] pry(#<BookingsController>)> @booking.payment_information.attributes
=> {:id=>nil,
 :payment_method=>"COTN",
 :payment_amount=>#<BigDecimal:7fa49d13aad0,'0.5E3',9(18)>,
 :commission_by_percentage=>true,
 :commission=>#<BigDecimal:7fa49d139b80,'0.7E1',9(18)>,
 :paid=>nil,
 :booking_id=>5}