我试图通过django rest框架API上传图像，但我没有得到正确的形式。

models.pyin my 'core' app：

def office_image_file_path(instance, filename):
    ext = filename.split('.')[-1]
    filename = f'{uuid.uuid4()}.{ext}'

    return os.path.join('uploads/office/', filename)

class Office(models.Model):
    # Other fields...
    image = models.ImageField(null=True, upload_to=office_image_file_path)

serializer.pyin 'office' app：

class OfficeSerializer(serializers.ModelSerializer):    
    class Meta:
        """Meta class for OfficeSerializer."""

        model = Office
        fields = "__all__"

class OfficeImageSerializer(serializers.ModelSerializer):
    """Serializer for uploading images to recipes"""

    class Meta:
        model = Office
        fields = ('id', 'image')
        read_only_fields = ('id',)
        extra_kwargs = {'image': {'required': True}}

views.pyin 'office' app：

class OfficeViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows offices to be viewed or edited if authenticated.
    """
    queryset = Office.objects.all()
    serializer_class = OfficeSerializer
    authentication_classes = [TokenAuthentication]
    permission_classes = [IsAuthenticated]

    def get_queryset(self):
        """
        Retrive offices for authenticated users.
        """
        return self.queryset.filter(user=self.request.user)

    def get_serializer_class(self):
        if self.action == 'upload_image':
            return OfficeImageSerializer

        return OfficeSerializer

    def perform_create(self, serializer):
        serializer.save(user=self.request.user)

    @action(methods=['POST'], detail=True, url_path='upload-image')
    def upload_image(self, request, pk=None):
        office = self.get_object()
        print(request.data)  # Debug: Print the request data
        serializer = self.get_serializer(
            office,
            data=request.data
        )

        if serializer.is_valid():
            serializer.save()
            return Response(
                serializer.data,
                status=status.HTTP_200_OK
            )

        return Response(
            serializer.errors,
            status=status.HTTP_400_BAD_REQUEST
        )

在Swagger中，当我尝试通过/office/office/{id}/upload-image/上传图像时，我没有得到“选择文件”按钮。相反，我得到一个字符串（$uri）字段，我不能执行文件上传。我已经在setting.py文件中设置了MEDIA_URL和MEDIA_ROOT。
我期待一个像这样的形式：

但是得到了：