Follow feature for Rails3 with Mongoid¶ ↑

In Gemfile:

gem 'mongoid_follow'

"follower" is a model who follows
"followee" is a model who would be followed

To make mongoid_follow usable you need to include Mongoid::Followee into your document who would be followed then you also need to include Mongoid::Follower in your follower model:

class User
  include Mongoid::Document

  include Mongoid::Followee
  include Mongoid::Follower
end

class Group
  include Mongoid::Document

  include Mongoid::Followee
end

You can then follow a model using:

@bonnie = User.create
@clyde = User.create

@bonnie.follow(@clyde)
@bonnie.unfollow(@clyde)

You can also see whether a model is a follower of another model or if a model is a followee of another model:

@clyde.follower?(@bonnie)
@bonnie.followee?(@clyde)

You can also be a follower of other models

@gang = Group.create
@bonnie.follow(@group)

@gang.follower?(@bonnie)
@bonnie.follows?(@gang)

Get all followers/followees by

@gang.all_followers
@bonnie.all_followees

You can also get followers/followees by a certain model

@gang.all_followers_by_model(User)
@bonnie.all_followees_by_model(Gang)

Get the count of followers/followees using

@gang.followers_count
@bonnie.followees_count

Or by a certain model by

@gang.followers_count_by_model(User)
@bonnie.followees_count_by_model(User)

You can use dynamic methods to shorten code for getting followers/followees or their count of a certain model by

@gang.all_user_followers
@bonnie.all_gang_followees

@gang.user_followers_count
@bonnie.user_followees_count

You can attach callbacks to the follower/followee models before or after the follow.

# Follower model
def before_follow(followee)
  puts 'Notify me'
end

# Other follower callbacks
after_follow
before_unfollow
after_unfollow

# Followee model
def before_followed_by(follower)
  puts 'Something here'
end

# Other followee callbacks
after_followed_by
before_unfollowed_by
after_unfollowed_by

Note: careful with using callbacks, we have no transaction so if it breaks on your callbacks, what gets saved is saved.

• Any bug or issue, please send me an email to aeguintu@gmail.com

gem install 'mongoid'
gem install 'bson_ext'
gem install 'database_cleaner'
gem install 'rspec'

rake spec/specs/follow_spec_rb

• limit result of followers/followees

Awesome thanks to:

mongoid_followable
Tristan Peralta

Copyright © Alec Guintu. See LICENSE.txt for further details.