Django REST Framework图像上传

Question

我有型号产品:

def productFile(instance, filename):
    return '/'.join( ['products', str(instance.id), filename] )

class Product(models.Model):
    ...

    image = models.ImageField(
        upload_to=productFile,
        max_length=254, blank=True, null=True
    )
    ...

然后我有序列化器:

class ProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = (
            ...
            'image',
            ...
        )

然后我有意见:

class ProductViewSet(BaseViewSet, viewsets.ModelViewSet):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer

如何使用Postman上传图片？将图像上传到模型的最佳做法是什么？谢谢.

Answer 1

我最近开始使用 Django，上传图片也有同样的问题。

我完成的所有步骤

1. 安装 Pillow 以使用 ImageField

   pip install Pillow
   

2. 在Settings.py添加这些行

   MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
   MEDIA_URL = '/media/' # 'http://myhost:port/media/'
   

3. 在model.py中使用ImageField（创建nameFile文件夹和文件名的创建函数）

   def nameFile(instance, filename):
       return '/'.join(['images', str(instance.name), filename])
   
   class UploadImageTest(models.Model):
       name = models.CharField(max_length=100)
       image = models.ImageField(upload_to=nameFile, blank=True, null=True)
   

4. 序列化程序.py

   class ImageSerializer(serializers.ModelSerializer):
       class Meta:
           model = UploadImageTest
           fields = ('name', 'image')
   

5. 视图.py

   class ImageViewSet(ListAPIView):
       queryset = UploadImageTest.objects.all()
       serializer_class = ImageSerializer
   
       def post(self, request, *args, **kwargs):
           file = request.data['file']
           image = UploadImageTest.objects.create(image=file)
           return HttpResponse(json.dumps({'message': "Uploaded"}), status=200)
   

6. urls.py: 添加这一行

   path('upload/', views.ImageViewSet.as_view(), name='upload'),
   

7. admin.py：添加这一行（用于签入管理员）

   admin.site.register(UploadImageTest)
   

8. 在终端

   python manage.py makemigrations
   python manage.py migrate
   

Answer 2

您可以创建单独的端点来上传图像,它将是这样的:

class ProductViewSet(BaseViewSet, viewsets.ModelViewSet):
    queryset = Product.objects.all()
    serializer_class = ProductSerializer

    @detail_route(methods=['post'])
    def upload_docs(request):
        try:
            file = request.data['file']
        except KeyError:
            raise ParseError('Request has no resource file attached')
        product = Product.objects.create(image=file, ....)

你可以解决这个问题

- 更新:这是如何从邮递员上传