imajes · March 10, 2011 00:43
diff --git a/1_user.rb b/1_user.rb
 class User
  include Mongoid::Document
  references_one :best_friend, :class_name => "Person"
  references_one :worst_enemy, :class_name => "Person"
 end
diff --git a/2_person.rb b/2_person.rb
 class Person
  include Mongoid::Document
 end
diff --git a/3_i_fail.rb b/3_i_fail.rb
 person = Person.create!
 user = User.create! :best_friend => person
 user.best_friend  # => #<Person _id: 4d781dbd568ab57112000002, _type: nil, _id: BSON::ObjectId('4d781dbd568ab57112000002')>
 user.reload
 user.best_friend # => nil
	class User
	include Mongoid::Document
	references_one :best_friend, :class_name => "Person"
	references_one :worst_enemy, :class_name => "Person"
	end
	person = Person.create!
	user = User.create! :best_friend => person
	user.best_friend # => #<Person _id: 4d781dbd568ab57112000002, _type: nil, _id: BSON::ObjectId('4d781dbd568ab57112000002')>
	user.reload
	user.best_friend # => nil