当数据很多时，SearchFilter 行为不当

Question

我在有大约 10 条记录时测试了 SearchFilter，它工作正常，但是当数据记录超过 200 条时我继续测试它，它只是返回相同的数据而不搜索或过滤数据，下面是我的视图文件：

class PostList(generics.ListCreateAPIView):
    """Blog post lists"""
    queryset = Post.objects.filter(status=APPROVED)
    serializer_class = serializers.PostSerializer
    authentication_classes = (JWTAuthentication,)
    permission_classes = (PostsProtectOrReadOnly, IsMentorOnly)
    filter_backends = [DjangoFilterBackend, filters.SearchFilter]
    filter_fields = ('title', 'body', 'description',)
    search_fields = (
        '@title',
        '@body',
        '@description',
    )


    def filter_queryset(self, queryset):
        ordering = self.request.GET.get("order_by", None)
        author = self.request.GET.get("author", None)
        if ordering == 'blog_views':
            queryset = queryset.annotate(
                address_views_count=Count('address_views')).order_by(
                '-address_views_count')

        if author:
            queryset = queryset.filter(owner__email=author)

        return queryset

我是这样搜索的：

/api/v1/blogs/?search=an+elephant

但它只是 returns 返回所有数据而不是过滤。

Answer 1

因为您覆盖了 filter_queryset，它将不再与 filter_backends 一起过滤数据。您应该通过超级调用进一步过滤查询集：

class PostList(generics.ListCreateAPIView):
    # …
    
    def filter_queryset(self, queryset):
        ordering = self.request.GET.get('order_by', None)
        author = self.request.GET.get('author', None)
        # filter queryset with filter_backends 🖟
        queryset = <strong>super().filter_queryset(queryset)</strong>
        if ordering == 'blog_views':
            queryset = queryset.annotate(
                address_views_count=Count('address_views')
            ).order_by('-address_views_count')
        
        if author:
            queryset = queryset.filter(owner__email=author)
        
        return queryset

当数据很多时，SearchFilter 行为不当

SearchFilter misbehaves when data is a lot

django

python-3.x

django-rest-framework