TypeError: cannot unpack non-iterable int object in Django rest framework

Question

我正在尝试获取与该商家关联的那些产品的订单列表。在我的项目中，每个产品都与商家相关联。在商家仪表板中，商家应该只能查看他们的产品和订单。

当我尝试根据与该商家关联的产品过滤订单时，出现上述错误。

我的模特：

class Product(models.Model):  
    
    merchant = models.ForeignKey(Seller,on_delete=models.CASCADE,blank=True,null=True)
    category = models.ManyToManyField(Category, blank=False)
    brand = models.ForeignKey(Brand, on_delete=models.CASCADE)

class Order(models.Model):
    ORDER_STATUS = (
        ('To_Ship', 'To Ship',),
        ('Shipped', 'Shipped',),
        ('Delivered', 'Delivered',),
        ('Cancelled', 'Cancelled',),
    )
    user = models.ForeignKey(User, on_delete=models.CASCADE, blank=True)
    #items = models.ManyToManyField(OrderItem,blank=True, null=True,related_name="order_items")
    #start_date = models.DateTimeField(auto_now_add=True)
    order_status = models.CharField(max_length=50,choices=ORDER_STATUS,default='To_Ship')

    ordered_date = models.DateTimeField(auto_now_add=True)
    ordered = models.BooleanField(default=False)
    total_price = models.CharField(max_length=50,blank=True,null=True)
    #billing_details = models.OneToOneField('BillingDetails',on_delete=models.CASCADE,null=True,blank=True,related_name="order")

    def __str__(self):
        return self.user.email

    class Meta:
        verbose_name_plural = "Orders"
        ordering = ('-id',)

class OrderItem(models.Model):
    #user = models.ForeignKey(User,on_delete=models.CASCADE, blank=True)
    order = models.ForeignKey(Order,on_delete=models.CASCADE, blank=True,null=True,related_name='order_items')
    item = models.ForeignKey(Product, on_delete=models.CASCADE,blank=True, null=True)
    order_variants = models.ForeignKey(Variants,on_delete=models.CASCADE,blank=True,null=True)
    quantity = models.IntegerField(default=1)
    total_item_price = models.CharField(max_length=50,blank=True,null=True)


    def __str__(self):
        return f"{self.quantity} items of {self.item} of {self.order.user}"

    class Meta:
        verbose_name_plural= "Cart Items"
        ordering = ('-id',)

我的看法：

class SellerOrderAPIView(ListAPIView):
    permission_classes = [AllowAny]
    serializer_class = OrderItemSerializer

    def get_queryset(self):
        merchant = get_object_or_404(Seller,self.kwargs['pk'])
        return OrderItem.objects.all(item__merchant=merchant)

我的序列化程序：

class OrderItemSerializer(serializers.ModelSerializer):
    order_variants = VariantSerializer(read_only=True)
    #order_variants =VariantSerializer()
    item = ProductSerializer(read_only=True)
    class Meta:
        model = OrderItem
        fields = ['id','order','item','order_variants', 'quantity']
        # depth = 1

在这里，我看到当我看到 orderdetails 时，merhchant 在 item 里面，这就是为什么我尝试使用 item__merchant=merchant 过滤查询集，但是我得到了这个错误。

我的网址：

path('api/merchantorder/<int:pk>', views.SellerOrderAPIView.as_view(), name='api-merchant-orderdetail'),

Answer 1

您需要指定过滤字段的名称：

class SellerOrderAPIView(ListAPIView):
    permission_classes = [AllowAny]
    serializer_class = OrderItemSerializer

    def get_queryset(self):
        merchant = get_object_or_404(Seller<b>, pk=self.kwargs['pk']</b>)
        return OrderItem.objects.filter(item__merchant=merchant)

但是您可以简单地避免查找并使用：

class SellerOrderAPIView(ListAPIView):
    permission_classes = [AllowAny]
    serializer_class = OrderItemSerializer

    def get_queryset(self):
        return OrderItem.objects.filter(<b>item__merchant=self.kwargs['pk']</b>)

TypeError: cannot unpack non-iterable int object in Django rest framework

TypeError: cannot unpack non-iterable int object in Django rest framework

api

django

iterable

object

django-rest-framework