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path: root/app/models/favorite.rb
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class Favorite < ActiveRecord::Base
  belongs_to :user
  belongs_to :creation, counter_cache: true, touch: true
  after_create :create_activity

  def create_activity
    transaction do
      Activity.create(user: creation.author, subject: self)
      creation.author.notify_of_activity
    end
  end
end