使用一次調用創建多個對象

Question

我想在我的模型中使用django REST框架添加多個對象。用戶將把Cart對象的多組數據發送到CartAddSerializer，串行器將逐個添加數據庫中的行。我的代碼迄今取得的進展如下：

models.py：

class Cart(models.Model): 
    user = models.ForeignKey(User) 
    product = models.ForeignKey(Product) 
    sh_price = models.DecimalField(max_digits=10, decimal_places=2) 
    quantity = models.IntegerField() 
    date_added = models.DateTimeField(auto_now_add=True, blank=True, null=True) 

class Meta: 
    unique_together = ["user", "product"] 

serializer.py：

class CartAddSerializer(ModelSerializer): 

def __init__(self, *args, **kwargs): 
    many = kwargs.pop('many', True) 
    super(CartAddSerializer, self).__init__(many=many, *args, **kwargs) 

class Meta: 
    model = Cart 
    fields = ['user', 'product', 'sh_price', 'quantity', 'date_added'] 
    extra_kwargs = {'date_added': {'read_only': True}, 
        'sh_price': {'read_only': True},} 

def create(self, data): 
    product_data = data.get('product' or None) 
    print(product_data) 
    print(product_data.id) 
    product_price = ProductPrice.objects.get(product=product_data) 
    print(product_price) 
    print(product_price.sh_price) 
    return Cart.objects.create(sh_price=product_price.sh_price, **data) 

views.py：

class CartAddAPIView(ListCreateAPIView): 
    queryset = Cart.objects.all() 
    serializer_class = CartAddSerializer 
    lookup_field = 'pk' 
    lookup_url_kwarg = 'id' 

    def get(self, request, *args, **kwargs): 
     try: 
      cart = Cart.objects.filter(user=self.kwargs['id']) 
      print(cart) 
      serializer = CartDetailSerializer(cart, many=True, context={'request': request}) 
      return Response(serializer.data, status=status.HTTP_200_OK) 
     except Exception as e: 
      print(str(e)) 
      return Response({"status": "failed"}, status=status.HTTP_400_BAD_REQUEST) 

Answer 1

一般，ListCreateAPIView是由GenericAPIView，ListModelMixin，CreateModelMixin混合，所以它不提供創建列表對象的功能。這很有趣〜listcreateapiview

這是一個例子，你應該用json格式的數據發佈它。

[ 
    { 
     "user": 1, 
     "product": 2, 
     "sh_price": 10, 
     "quantity": 3, 
    }, 
    { 
     another object 
    }, 
    ... 
] 


def post(self, request): 
    serializer = self.get_serializer(data=request.data, many=True, context={'request': request}) #many=True 
    serializer.is_valid() #validate request.data 
    serializer.save()  #save every object of request.data