Question

使用Django 1.11＆amp; djangorestframework == 3.7.7，我想在GET调用中返回is_thumbnail = True的视频。但是，我使用过滤器进行的所有测试都返回了所有视频对象。

型号：

class Videos(models.Model):
    """This class represents the Videos model."""
    uid = models.UUIDField(
        primary_key=True, default=uuid.uuid4, editable=False)
    is_thumbnail = models.BooleanField(default=False)
    file_name = models.CharField(unique=True, max_length=64)
    file_path = models.CharField(unique=True, max_length=256)
    file_created_time = models.DateTimeField()
    owner = models.ForeignKey('auth.User',
                              related_name='videos',
                              on_delete=models.CASCADE)
    created_time = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        """Return a human readable representation of the model instance."""
        return "{}".format(self.file_name)

视图：

class DetailsView(generics.RetrieveUpdateDestroyAPIView):
    """This class handles the http GET, PUT and DELETE requests."""

    serializer_class = VideosSerializer
    permission_classes = (permissions.IsAuthenticated, IsOwner)
    lookup_field = 'uid'

    def get_queryset(self):
        return Videos.objects.filter(is_thumbnail=True)

如果我在get_queryset函数中放置一个print语句，我在日志中看不到该语句。所以看起来这个函数没有被调用。

API / urls.py

urlpatterns = {
    url(r'^auth/', include('rest_framework.urls',
                           namespace='rest_framework')),
    url(r'^api/videos/$', CreateView.as_view(), name="create"),
    url(r'^api/videos/(?P<uid>[0-9a-f-]+)/$',
        DetailsView.as_view(), name="details"),
    url(r'^get-token/', obtain_auth_token),
}

securedash_project / urls.py

    urlpatterns = format_suffix_patterns(urlpatterns)

urlpatterns = [
    url(r'', include('secureDash.dash.urls')),
    url(r'^dash/', include('secureDash.dash.urls')),
    url(r'^admin/', admin.site.urls),
    url(r'^', include('secureDash.api.urls')),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Answer 1

好的，你想要替换＆＃34; get_queryset＆＃34;的值。通用视图＆＃34; generics.RetrieveUpdateDestroyAPIView＆＃34;的方法，它使用＆＃34; uid＆＃34;来访问对象。像lookup_field这样的字段设置稍后进行修改，所以我建议当你覆盖它时，＆＃34; get_queryset＆＃34;方法用以下内容替换它们：

def get_queryset(self):
    return self.get_queryset().filter(is_thumbnail=True)

Answer 2

我遇到的问题是我有一个实现generics.ListCreateAPIView的CreateView类。这个视图有r / w端点，所以我的GET调用永远不会到达我的DetailsView。我需要调整我的观点，但现在这只能显示is_thumbnail =真实视频。

class CreateView(generics.ListCreateAPIView):
    """This class defines the (GET & POST) behavior of the rest api."""

    serializer_class = VideosSerializer
    permission_classes = (permissions.IsAuthenticated, )

    def perform_create(self, serializer):
        """Save the post data when creating a new Videos object."""
        serializer.save(owner=self.request.user)

    def get_queryset(self):
        queryset = Videos.objects.all()

        return queryset.filter(is_thumbnail=True)


class DetailsView(generics.RetrieveUpdateDestroyAPIView):
    """This class handles the http GET, PUT and DELETE requests."""

    queryset = Videos.objects.all()
    serializer_class = VideosSerializer
    permission_classes = (permissions.IsAuthenticated, IsOwner)
    lookup_field = 'uid'

Django Rest Framework过滤不起作用

2 个答案: