delete aspect_visibilities when deleting the shareable

  module Shareable

    def self.included(model)

      model.instance_eval do

        has_many :aspect_visibilities, as: :shareable, validate: false

        has_many :aspect_visibilities, as: :shareable, validate: false, dependent: :delete_all

        has_many :aspects, through: :aspect_visibilities

        has_many :share_visibilities, as: :shareable, dependent: :delete_all