I have an application which use the gem acts_as_follower to user follow each other. I'm also using the activity_notification to notify users about the app. In the acts_as_follower model I have: follow.rb class Follow < ActiveRecord::Base extend ActsAsFollower::FollowerLib extend ActsAsFollower::FollowScopes # NOTE: Follows belong to the "followable" interface, and also to followers belongs_to :followable, :polymorphic => true belongs_to :follower, :polymorphic => true def block! self.update_attribute(:blocked, true) end # acts_as_notifiable configures your model as ActivityNotification::Notifiable # with parameters as value or custom methods defined in your model as lambda or symbol. # The first argument is the plural symbol name of your target model. acts_as_notifiable :users, # Notification targets as :targets is a necessary option # Set to notify to author and users commented to the article, except comment owner self targets: ->(follow, key) { ([follow.user] + follow.user.to_a - [follow.user]).uniq } tracked: true # Path to move when the notification is opened by the target user # This is an optional configuration since activity_notification uses polymorphic_path as default end  But I'm not getting the notifications. Should I try targets: ->(current_user, key) { ([current_user.follow] + current_userfollow.to_a - [current_user.follow]).uniq }  Someone already worked with this gems before? How can I get this notifications working? I'm using devise for users. Thanks!!