Django 无法将关键字average_rating解析为字段

这是我的模型和视图文件.

class Article(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    author = models.ForeignKey(User, on_delete=models.CASCADE, related_name='articles')
    caption = models.CharField(max_length=250)
    
    @property
    def average_rating(self):
        return self.articlecomments.all().aggregate(Avg('rate')).get('rate__avg', 0.00)

class ArticleComment(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    article = models.ForeignKey(Article, on_delete=models.CASCADE, null=True, blank=True, related_name='articleratings')
    author = models.ForeignKey(User, on_delete=models.CASCADE, null=True, blank=True, related_name='articleratings_author')
    rate = models.IntegerField(default='0')

class ArticleByCategoryViewSet(viewsets.ModelViewSet):
    permission_classes = (IsAuthenticated,)
    queryset = Article.objects.all().order_by('-average_rating')
    serializer_class = ArticleSerializer
    pagination_class = StandardResultsSetPagination

我试图做的是根据文章的评级对文章进行排序，但这不起作用.它给了我这个错误:

raise FieldError("Cannot resolve keyword '%s' into field. "
django.core.exceptions.FieldError: Cannot resolve keyword 'average_rating' into field. Choices are:......

我把它当做财产.我怎么才能解决这个问题呢？有没有其他办法？