Mongoid persistence mode (fire and forget by default)

gistfile1.rb

class MyModel
  include Mongoid::Document
  include Mongoid::Timestamps

  field :value, :type => String
  index :value, :unique => true

  attr_accessible :value
end

MyModel.delete_all
MyModel.create_indexes

5.times{|t| puts MyModel.create!({:value => 'myvalue'}).inspect }
# #<MyModel _id: 50643bbc654af19b4a000093, value: "myvalue", updated_at: Thu Sep 27 11:42:52 UTC 2012, created_at: Thu Sep 27 11:42:52 UTC 2012, _type: nil>
# #<MyModel _id: 50643bbc654af19b4a000094, value: "myvalue", updated_at: Thu Sep 27 11:42:52 UTC 2012, created_at: Thu Sep 27 11:42:52 UTC 2012, _type: nil>
# #<MyModel _id: 50643bbc654af19b4a000095, value: "myvalue", updated_at: Thu Sep 27 11:42:52 UTC 2012, created_at: Thu Sep 27 11:42:52 UTC 2012, _type: nil>
# #<MyModel _id: 50643bbc654af19b4a000096, value: "myvalue", updated_at: Thu Sep 27 11:42:52 UTC 2012, created_at: Thu Sep 27 11:42:52 UTC 2012, _type: nil>
# #<MyModel _id: 50643bbc654af19b4a000097, value: "myvalue", updated_at: Thu Sep 27 11:42:52 UTC 2012, created_at: Thu Sep 27 11:42:52 UTC 2012, _type: nil>
 # => 5 


MyModel.all.to_a
# => [#<MyModel _id: 50643a81654af19b4a00000c, value: "myvalue", updated_at: Thu Sep 27 11:37:37 UTC 2012, created_at: Thu Sep 27 11:37:37 UTC 2012, _type: nil>]