class Comment < ActiveRecord::Base belongs_to :user belongs_to :answer validates :user_id, presence: true validates :answer_id, presence: true validates :content, length: { maximum: 160 } after_create do Subscription.subscribe self.user, answer, false Subscription.notify self, answer user.increment! :commented_count answer.increment! :comment_count end before_destroy do rep = Report.where(target_id: self.id, type: Reports::Comment) rep.each do |r| unless r.nil? r.deleted = true r.save end end Subscription.denotify self, answer user.decrement! :commented_count answer.decrement! :comment_count end def notification_type(*_args) Notifications::Commented end end