gistfile1.ru

#!/usr/bin/env ruby -Ku

# encoding: utf-8

require 'rubygems'
require 'dm-core'
require 'dm-migrations'
require 'dm-timestamps'

DataMapper.setup :default, 'sqlite3::memory:'

class Foo
  include DataMapper::Resource

  property :id, Serial
  property :name, String
  property :created_at, DateTime
  property :updated_at, DateTime
end

DataMapper.auto_migrate!

foo = Foo.create :name => 'foo'

puts foo.inspect # has timestamps

foo.reload

puts foo.inspect # nil timestamps

foo.save # nil timestamps are persisted

puts foo.created_at # nil
puts foo.updated_at # nil