datamapper after :create.rb

require 'rubygems'
require 'dm-core'

class Foo
   include DataMapper::Resource
  
   property :id, Serial
   property :foo, Integer
   property :bar, String

	after :create do |status|
	   self.update(:bar => "hello#{self.foo}#{self.id}")
	end	
end

DataMapper.setup(:default, "sqlite3::memory:")
DataMapper.auto_migrate!
Foo.create(:foo => 21)
puts Foo.first.foo
puts Foo.first.id
puts Foo.first.bar