1 class Ship
< ActiveRecord
::Base
2 self.record_timestamps
= false
5 has_many
:parts, :class_name => 'ShipPart', :autosave => true
7 accepts_nested_attributes_for
:pirate, :allow_destroy => true, :reject_if => proc
{ |attributes
| attributes
.empty
? }
9 validates_presence_of
:name