gistfile1.txt

require 'rubygems'
require 'mongoid'

Mongoid.configure do |config|
  config.master = Mongo::Connection.new.db("mongoid_key_test")
end

Mongoid.master.collection("users").drop

class User
  include Mongoid::Document
  field :username
  key :username
  validates_uniqueness_of :username
end

2.times do
	@user =  User.create!(:username => "Charles")
end

/home/fredrik/.rvm/gems/ruby-head/gems/mongo-0.20.1/lib/mongo/connection.rb:370:in `send_message_with_safe_check': E11000 duplicate key error index: mongoid_key_test.users.$_id_  dup key: { : "charles" } (Mongo::OperationFailure)
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongo-0.20.1/lib/mongo/collection.rb:655:in `insert_documents'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongo-0.20.1/lib/mongo/collection.rb:235:in `insert'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:38:in `block (3 levels) in proxy'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:22:in `call'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:22:in `attempt'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:39:in `block (2 levels) in proxy'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:38:in `block (3 levels) in proxy'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:22:in `call'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:22:in `attempt'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/collections/mimic.rb:39:in `block (2 levels) in proxy'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence/insert.rb:43:in `insert'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence/insert.rb:28:in `block (2 levels) in persist'
	from /home/fredrik/.rvm/gems/ruby-head/gems/activesupport-3.0.0.beta3/lib/active_support/callbacks.rb:413:in `_run_save_callbacks'
	from /home/fredrik/.rvm/gems/ruby-head/gems/activesupport-3.0.0.beta3/lib/active_support/callbacks.rb:88:in `run_callbacks'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence/insert.rb:27:in `block in persist'
	from /home/fredrik/.rvm/gems/ruby-head/gems/activesupport-3.0.0.beta3/lib/active_support/callbacks.rb:408:in `_run_create_callbacks'
	from /home/fredrik/.rvm/gems/ruby-head/gems/activesupport-3.0.0.beta3/lib/active_support/callbacks.rb:88:in `run_callbacks'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence/insert.rb:26:in `persist'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence.rb:41:in `insert'
	from /home/fredrik/.rvm/gems/ruby-head/gems/mongoid-2.0.0.beta4/lib/mongoid/persistence.rb:174:in `create!'
	from test.rb:18:in `block in <main>'
	from test.rb:17:in `times'
	from test.rb:17:in `<main>'