This gem for change Mongoid id field as Integer like MySQL.
Idea from MongoDB document: How to Make an Auto Incrementing Field
# Mongoid 3.0.x
gem 'mongoid_auto_increment_id', "0.6.1"
# Mongoid 3.1.0
gem 'mongoid_auto_increment_id', "0.6.2"
# Mongoid 4.0.0+
gem 'mongoid_auto_increment_id', "0.6.4"
ruby > post = Post.new(:title => "Hello world")
=> #<Post _id: , _type: nil, title: "Hello world", body: nil>
ruby > post.save
=> true
ruby > post.inspect
=> "#<Post _id: 6, _type: nil, title: \"Hello world\", body: nil>"
ruby > Post.find("6")
=> "#<Post _id: 6, _type: nil, title: \"Hello world\", body: nil>"
ruby > Post.find(6)
=> "#<Post _id: 6, _type: nil, title: \"Hello world\", body: nil>"
ruby > Post.desc(:_id).all.to_a.collect { |row| row.id }
=> [20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1]
This is a branchmark results run in MacBook Pro Retina.
with mongoid_auto_increment_id
:
user system total real
Generate 1 0.000000 0.000000 0.000000 ( 0.004301)
Post current: 1
Generate 100 0.070000 0.000000 0.070000 ( 0.091638)
Post current: 101
Generate 10,000 7.300000 0.570000 7.870000 ( 9.962469)
Post current: 10101
without:
user system total real
Generate 1 0.000000 0.000000 0.000000 ( 0.002569)
Post current: 1
Generate 100 0.050000 0.000000 0.050000 ( 0.052045)
Post current: 101
Generate 10,000 5.220000 0.170000 5.390000 ( 5.389207)
Post current: 10101