Question

我对Django和DRF很陌生。我有一个带有图像和ForeignKey字段的 Model 。

class Image(models.Model):
    image = models.ImageField(blank=False, null=False)
    predicted_result = models.ForeignKey(PredictedIllness, on_delete=models.CASCADE)

序列化器：

class ImageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Image
        fields =['image','predicted_result']

和视图：

class UploadImage(APIView):
    def post(self, request, format=None):
        serializer = ImageSerializer(data=request.data, partial=True)
        if serializer.is_valid():
            serializer.save()
            return Response('Classified', status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def classify_image(self, image_file, image):
        image = open_image(image)
        pred_class, pred_idx, outputs = fastAi_learner.predict(image)
        print(pred_class.data.item())
        return pred_class.data.item()

因此，当我使用POST请求拍摄时，一切正常，并且响应：返回带有状态201的“分类”。

但是，我要做的是使用classify_image函数对图像自己进行分类。

def post(self, request, format=None):
    try:
        im = pilImage.open(request.data['image'])
        if im.load():
            predicted_condition = self.classify_image(image_file=request.data['image'].name,
                                                      image=request.data['image'])
            request.data['predicted_result'] = predicted_condition
            serializer = ImageSerializer(data=request.data, partial=True)
            if serializer.is_valid():
                serializer.save()
                return Response(1, status=status.HTTP_201_CREATED)
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    except IOError:
        return Response('problems with image', status=status.HTTP_400_BAD_REQUEST)

出于某种原因，当我以完全相同的要求从邮递员射击时，收到以下400条回复：

{
    "image": [
        "Upload a valid image. The file you uploaded was either not an image or a corrupted image."
    ]
}

什么会导致引发此错误？因为我发送的图像完全相同。以及如何将自定义数据（不是来自请求）添加到序列化器本身/正确地请求？

无法使用post request使用post method中的另一个函数序列化request.data。 DRF

0 个答案: