python - Viewset 的 Django 更新方法即使在覆盖后仍返回 415

Question

现在我正在学习使用 Django 创建 REST API，但正在努力实现 Update 方法。我的测试总是失败，我不确定这是因为序列化器还是其他原因。希望对我的代码有一些快速反馈!

class Company(models.Model):
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    name = models.CharField(max_length=50)

class JobPost(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    company = models.ForeignKey(Company, on_delete=models.CASCADE, related_name='guest_posts')
    heading = models.CharField(max_length=100, default="")

class CompanySerializer(serializers.ModelSerializer):
    class Meta:
        model = Company
        fields = ('name')

class JobPostSerializer(serializers.ModelSerializer):
    company = CompanySerializer(read_only=True, required=False)

    class Meta:
        model = GuestPost
        fields = ('id', 'heading', 'company')

    def create(self, validated_data):
        request = self.context.get('request')
        company = Company.objects.get(title=request.data.get('company_name'))
        return GuestPost.objects.create(owner=request.user,
                                        heading=validated_data.get('heading'),
                                        company=company)

    def update(self, instance, validated_data):
        instance.heading = validated_data.pop('heading')
        instance.save()
        return instance

class JobPostViewSet(viewsets.ViewSet,
                     viewsets.generics.ListCreateAPIView,
                     viewsets.mixins.UpdateModelMixin,
                     viewsets.mixins.RetrieveModelMixin):
    permission_classes = (JobPostPermissions,)
    serializer_class = JobPostSerializer
    queryset = JobPost.objects.all()

然后我测试此代码，其他操作(创建、获取、列表)的所有测试都有效，但在使用以下方法测试更新时收到错误 415:

class Test(TestCase):

    def setUp(self):
        self.user = User.objects.create(username="elon")
        self.factory = RequestFactory()
        self.request_url = '/api/job-post/'
        self.boring_company = Company.objects.create(owner=self.user, title="Boring Company")
        self.job_post = JobPost.objects.create(company=self.boring_company, heading="Looking for boring person")
        self.sample_uuid = self.job_post.id

    def test_update_post(self):
        data = {
            'id': self.sample_uuid,
            'heading': 'New Heading',
            'description': 'new description',
        }
        request = self.factory.put(self.request_url, data=data)
        view = GuestPostViewSet.as_view({'put': 'update'})
        force_authenticate(request, user=self.user)
        response = view(request, pk=self.sample_uuid)
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response.data['heading'], 'New Heading')

提前致谢!

Answer 1

我在第二次查看 Django Rest docs 后偶然发现了答案。 。正如其他人指出的那样，问题出在测试上。以下是更新请求所需执行的官方示例:

from django.test.client import encode_multipart, RequestFactory

factory = RequestFactory()
data = {'title': 'remember to email dave'}
content = encode_multipart('BoUnDaRyStRiNg', data)
content_type = 'multipart/form-data; boundary=BoUnDaRyStRiNg'
request = factory.put('/notes/547/', content, content_type=content_type)