Question

我正在用Djnago和数据库mongo db开发我的应用程序。它基本上是一个订阅购买平台。在第二次购买订阅时，其抛出错误。

我的订购型号为：

class Order(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    ref_code = models.CharField(max_length=20, blank=True, null=True)
    subscriptions = models.ManyToManyField(OrderSubscription)
    start_date = models.DateTimeField(auto_now_add=True)
    ordered_date = models.DateTimeField()
    ordered = models.BooleanField(default=False)
    amount =  models.FloatField()
    billing_address = models.ForeignKey(
        'Address', related_name='billing_address', on_delete=models.SET_NULL, blank=True, null=True)
    payment = models.ForeignKey(
        'Payment', on_delete=models.SET_NULL, blank=True, null=True)
    coupon = models.ForeignKey(
        'Coupon', on_delete=models.SET_NULL, blank=True, null=True)
    being_delivered = models.BooleanField(default=False)
    received = models.BooleanField(default=False)
    refund_requested = models.BooleanField(default=False)
    refund_granted = models.BooleanField(default=False)

当某人带来订阅并想再次购买另一个Sub时，它在与同一用户创建另一个订单表时抛出重复键错误。

def finalcheckout(request):
    if request.method == "POST":
        subscription = get_object_or_404(Subscription, slug = request.POST.get("sub_slug"))
        order_subscription, created = OrderSubscription.objects.get_or_create(
        subscription=subscription,
        user=request.user,
        ordered=False
         )
        order = Order.objects.create(user=request.user)
        order.subscriptions.add(order_subscription)
        messages.info(request, "This subscription was added to your cart.")
        return redirect("core:order-summary")

错误：

参数：[2，None，datetime.datetime（2020，3，2，12，12，26，53，481937），无，错误，无，无，无，无，错误，错误，错误，错误] Pymongo错误：{'writeErrors'：[{'index'：0，'code'：11000， 'keyPattern'：{'backup_id'：1}，'keyValue'：{'backup_id'：None}， 'errmsg'：'E11000重复键错误集合： hostmanager.subscription_order索引： subscription_order_backup_id_79d0cc4e_uniq dup键：{backup_id：null }'，

Answer 1

该代码的这一行出现了异常，

order = Order.objects.create（user = request.user）

这意味着您使用的模型只有文本字段，没有任何主键

PyMongo中的E11000重复键错误收集

1 个答案: