如何使用 DJango Rest Framework 上传多个图像？

Question

我可以使用以下代码上传单个图像。如果我选择多张图片，则只有所选图片中的最后一张图片会被上传。

模型.py

class Image(models.Model):
property_id = models.ForeignKey(
                'properties.Address',
                null=False,
                default=1,
                on_delete=models.CASCADE
            )
image = models.ImageField(upload_to=directory_path)

序列化器.py

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

views.py

class ImageView(APIView):
parser_classes = (MultiPartParser, FormParser)

def get(self, request):
    all_images = Image.objects.all()
    serializer = ImageSerializer(all_images, many=True)
    return JsonResponse(serializer.data, safe=False)

def post(self, request, *args, **kwargs):
    file_serializer = ImageSerializer(data=request.data)
    if file_serializer.is_valid():
        file_serializer.save()
        return Response(file_serializer.data, status=status.HTTP_201_CREATED)
    else:
        return Response(file_serializer.errors, status=status.HTTP_400_BAD_REQUEST)

我对 Django 有点陌生。我想遍历 request.data 中收到的图像数组，谁能告诉我该怎么做？

Answer 1

所以我终于以自己的方式找到了一种解决方法，回到了基础，因为我没有找到任何方法来以 DRF 方式做到这一点。我希望这个答案对 Django 社区有所帮助。我保持我的模型和序列化程序相同，更改视图以迭代每个图像并使用序列化程序保存它。

views.py

class ImageView(APIView):
    parser_classes = (MultiPartParser, FormParser)

    def get(self, request):
        all_images = Image.objects.all()
        serializer = ImageSerializer(all_images, many=True)
        return JsonResponse(serializer.data, safe=False)

    def post(self, request, *args, **kwargs):
        property_id = request.data['property_id']

        # converts querydict to original dict
        images = dict((request.data).lists())['image']
        flag = 1
        arr = []
        for img_name in images:
            modified_data = modify_input_for_multiple_files(property_id,
                                                            img_name)
            file_serializer = ImageSerializer(data=modified_data)
            if file_serializer.is_valid():
                file_serializer.save()
                arr.append(file_serializer.data)
            else:
                flag = 0

        if flag == 1:
            return Response(arr, status=status.HTTP_201_CREATED)
        else:
            return Response(arr, status=status.HTTP_400_BAD_REQUEST)

helpers.py

def modify_input_for_multiple_files(property_id, image):
    dict = {}
    dict['property_id'] = property_id
    dict['image'] = image
    return dict

models.py

class Image(models.Model):
    property_id = models.ForeignKey(
                    'properties.Address',
                    null=False,
                    default=1,
                    on_delete=models.CASCADE
                )
    image = models.ImageField(upload_to=directory_path)

serializers.py

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

请求以 querydict 的形式出现。 images = dict((request.data).lists())['image'] 行将查询字典转换为 python 字典，然后在 'image' 键下循环遍历数组。

邮递员请求如下所示：

Answer 2

models.py

class Image(models.Model):
    property_id = models.ForeignKey(
                'properties.Address',
                null=False,
                default=1,
                on_delete=models.CASCADE
            )
    image = models.ImageField(upload_to=directory_path)

序列化器.py

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

views.py

class ImageAPIView(ListCreateAPIView):
    queryset = Image.objects.all()
    serializer_class = ImageSerializer
    def post(self, request, *args, **kwargs):
        property_id = request.data['property']
        form_data = {}
        form_data['property']= property_id
        success = True
        response = []
        for images in request.FILES.getlist('images'):
            form_data['images']=images
            print(form_data)
            serializer = PropertyImageSerializers(data=form_data)
            if serializer.is_valid():
                serializer.save()
                response.append(serializer.data)
            else:
                success = False
        if success:
            #return Response(response, status=status.HTTP_201_CREATED)
           
            return Response({
            'status' : 1, 
            'message' : 'Success',
            'Data' : response,
            })
            
          #returnResponse(response,status=status.HTTP_400_BAD_REQUEST)

        return Response({
            'status' : 0, 
            'message' : 'Error!',
        })    

Answer 3

您的解决方案应该是使用ListCreateAPIView。您不必实现自己的视图并处理所有事情。

class ImageView(generics.ListCreateAPIView):
    parser_classes = (MultiPartParser, FormParser)
    queryset = Image.objects.all()
    serializer_class = ImageSerializer

    def get_serializer(self, *args, **kwargs):
        if isinstance(kwargs.get('data', {}), list):
            kwargs['many'] = True
        return super(CreateListModelMixin, self).get_serializer(*args, **kwargs)