README.md in mongoid-locker-0.1.1 vs README.md in mongoid-locker-0.2.0
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# mongoid-locker [](http://travis-ci.org/afeld/mongoid-locker)
Document-level locking for MongoDB via Mongoid. The need arose at [Jux](https://jux.com) from multiple processes on multiple servers trying to act upon the same document and stepping on each other's toes. Mongoid-Locker is an easy way to ensure only one process can perform a certain operation on a document at a time.
-[Tested](http://travis-ci.org/afeld/mongoid-locker) against MRI 1.8.7, 1.9.2 and 1.9.3, Rubinius 1.8 and 1.9, and JRuby 1.8 and 1.9.
+[Tested](http://travis-ci.org/afeld/mongoid-locker) against MRI 1.8.7, 1.9.2 and 1.9.3, Rubinius 1.8 and 1.9, and JRuby 1.8 and 1.9 with Mongoid 2 and 3 ([where supported](http://travis-ci.org/#!/afeld/mongoid-locker)).
## Usage
Add to your `Gemfile`:
```ruby
-gem 'mongoid-locker', '~> 0.1.0'
+gem 'mongoid-locker', '~> 0.2'
```
and run `bundle install`. In the model you wish to lock, include `Mongoid::Locker` after `Mongoid::Document`. For example:
```ruby