def get_queryset(self):
        user = self.request.user

        queryset = Notification.objects.annotate(Count('album'), Count('video'))
        notifs_of_albums = queryset.filter(album__count=1)
        notifs_of_videos = queryset.filter(video__count=1)

        notifs_of_albums_to_user_ids = []
        notifs_of_videos_to_user_ids = []
        for subscription in user.subscriptions.all():
            if subscription.content_type.model == 'artist':
                notif = notifs_of_albums.filter(
                    album__artist=subscription.artist.first(),
                    album__release_date__gte=subscription.datetime_committed
                ).first()

                try:
                    notifs_of_albums_to_user_ids.append(notif.pk)
                except AttributeError:
                    pass

            elif subscription.content_type.model == 'channel':
                notif = notifs_of_videos.filter(
                    video__channel=subscription.channel.first(),
                    video__release_datetime__gte=subscription.datetime_committed
                ).first()

                try:
                    notifs_of_videos_to_user_ids.append(notif.pk)
                except AttributeError:
                    pass

        notifs_of_albums_to_user = notifs_of_albums.filter(
            pk__in=notifs_of_albums_to_user_ids
        )
        notifs_of_videos_to_user = notifs_of_videos.filter(
            pk__in=notifs_of_videos_to_user_ids
        )

        all_notifs_to_user = notifs_of_albums_to_user.union(notifs_of_videos_to_user)
        return all_notifs_to_user.order_by('-creation_date_time')