instance method touch_attachments

# File activestorage/app/models/active_storage/blob.rb, line 428
    def touch_attachments
      # The cascade exists to invalidate cache keys; it must not bump
      # +lock_version+ on parents, since blob analysis does not modify any
      # field of theirs and would otherwise race with concurrent edits.
      ActiveRecord::Locking::Optimistic.preserve_lock_version_on_touch do
        attachments.then do |relation|
          if ActiveStorage.touch_attachment_records
            relation.includes(:record)
          else
            relation
          end
        end.each do |attachment|
          attachment.touch unless attachment.new_record?
        end
      end
    end