如何使用DJango Rest Framework上传多张图片？ [英] How to upload multiple Images using DJango Rest Framework?

问题描述

我可以使用以下代码上传单个图像。如果我选择了多张图像，则只会上传所选图像中的最后一张图像。


models.py

I am able to upload a single image with the following code. If I select multiple images then only the last image among the selected image is getting uploaded.

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

serializers.py

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

views.py

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。我想循环遍历request.data中收到的图像数组。有人可以告诉我该怎么做吗？

I am a little new to Django. I want to loop over my array of images which is received in the request.data Can anyone tell me how to do it?

推荐答案

因此，我终于找到了一种以自己的方式解决问题的方法，因为我找不到以DRF方式进行处理的任何方法。我希望这个答案对Django社区有所帮助。我保持模型和序列化器相同，更改视图以遍历每个图像并使用序列化器保存。

So I finally got a workaround in my own way falling back to the basics as I didn't find any way to do it in a DRF way. I hope this answer is helpful to the Django community. I kept my model and serializers same changing the views to iterate over every image and save it using the serializer.

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。该行 images = dict（（request.data）.lists（））['image'] 将查询dict转换为python dict，然后循环遍历图片 键。

The request comes in the form of querydict. The line images = dict((request.data).lists())['image'] coverts query dict to python dict and then looping over the array under the 'image' key.

邮递员要求如下：

The postman request looks like below:

这篇关于如何使用DJango Rest Framework上传多张图片？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！