mongoid_likes allows you to easily add liking ability to you Mongoid documents.

Add the following to your Gemfile

gem 'mongoid_follow'

If you like living on the edge (or if this gem isn't yet available on rubygems) you can add

gem 'mongoid_likes', :git => 'git://github.com/stigi/mongoid_likes.git', :branch => 'development'

This gem has been tested with MongoID version 2.4.7.

Mongoid Likes provides two modules that you can mix in your model objects like that:

class User
  include Mongoid::Document

  include Mongoid::Liker
end

class Track
  include Mongoid::Document

  include Mongoid::Likeable
end

You can now like objects like this:

user = User.create
track = Track.create

user.like(track)

You can query for likes like that:

track.all_likers
# => [user]

track.likers_count
# => 1

user.all_likes
# => [track]

Also likes are polymorphic, so let's assume you have a second class Album that is including Mongoid::Likeable you can do something like this:

album = Album.create
user.like(album)
user.all_likes
# => [track, album]

user.all_likes_by_model(Album)
# => [album]

user.track_likes_count
# => 1

user.all_track_likes
# => [track]

You get the idea. Have a look at the specs to see some more examples.

• write a proper readme
• generate some documentation