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ActsAsNotifiable aims to be a flexibile notification system for your Rails application. On social networks, notifications can be sent from any kind of action. ActsAsNotifiable has 2 goals:

  1. Centralize the creation of notifications on different objects in a system
  2. Provide a modular way to deliver these notifications across various methods


Some examples of various things that may generate a notification include:

  • A user follows another user
  • A user comments on another user’s post
  • A user likes a post



RDocs for ActsAsNotifiable are available online here:


As systems become larger and users have more ways to receive notifications, a flexibile delivery system is needed. ActsAsNotifiable couriers will do just this.

Example couriers:

  • Email
  • Apple Push Notification
  • SMS

Example Usage

First, you will need a model to hold notifications.

ruby class Notification < ActiveRecord::Base include ActsAsNotifiable::Notification end `

A notification has the following properties:

ruby belongs_to :sender, polymorphic: true belongs_to :receiver, polymorphic: true belongs_to :notifiable: polymorphic: true belongs_to :target, polymorphic: true


With a base notification class in place we can start generating notifications for a user.

```ruby class Author < ActiveRecord::Base has_many :posts

# Set up relations to accept notifications receives_notifications end

class Post < ActiveRecord::Base has_many :comments belongs_to :author end

class Comment < ActiveRecord::Base # Comments are notifiable, they will send notifications out when created notifiable receiver: lambda { |c| }, sender: :author

# Specify a courier to send notifications, in this case email notify_via :email

belongs_to :author
belongs_to :post end ``` Whenever a comment is created, the author of the post the comment belongs to will receive a notification notifying them that the comment author commented on their post.

notify_via specifies any couriers to use to deliver this notification, in this case an email will be generated.


  • Document advanced usage
  • Abstract APNS courier out
  • Example courier creation
  • Refactor ActsAsNotifiable::Notification


MIT License. Copyright 2012 QFive, Inc.