1class Favorite < ApplicationRecord
 2  belongs_to :user
 3  belongs_to :creation, counter_cache: true, touch: true
 4  after_create :create_activity
 5
 6  def create_activity
 7    transaction do
 8      Activity.create(user: creation.author, subject: self)
 9      creation.author.notify_of_activity
10    end
11  end
12end