Question

您好，我想按提交进行交易，这是错误消息

/ cart / update-transaction / 0cqydz1f /上的IntegrityError /不为空约束失败：shopping_cart_transaction.product_id请求方法：GET请求网址：http://localhost:8000/cart/update-transaction/0cqydz1f/ Django 版本：2.2异常类型：IntegrityError异常值：NOT NULL 约束失败：shopping_cart_transaction.product_id

models.py

class Transaction(models.Model):
    profile = models.ForeignKey(Profile, on_delete=models.CASCADE)
    product = models.ForeignKey(Product,on_delete=models.CASCADE)
    token = models.CharField(max_length=120)
    order_id = models.CharField(max_length=120)
    amount = models.DecimalField(max_digits=100, decimal_places=2)
    success = models.BooleanField(default=True)
    timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)

    def __str__(self):
        return self.order_id

    class Meta:
        ordering = ['-timestamp']

views.py

    @login_required()
    def update_transaction_records(request, token):
        # get the order being processed
        order_to_purchase = get_user_pending_order(request)
    
        # update the placed order
        order_to_purchase.is_ordered=True
        order_to_purchase.date_ordered=datetime.datetime.now()
        order_to_purchase.save()
    
        # get all items in the order - generates a queryset
        order_items = order_to_purchase.items.all()
    
        # update order items
        order_items.update(is_ordered=True, date_ordered=datetime.datetime.now())
    
        # Add products to user profile
        user_profile = get_object_or_404(Profile, user=request.user)
        # get the products from the items
        order_products = [item.product for item in order_items]
        user_profile.ebooks.add(*order_products)
        user_profile.save()
    
    
        # create a transaction
        transaction = Transaction(profile=request.user.profile,
                                token=token,
                                order_id=order_to_purchase.id,
                                amount=order_to_purchase.get_cart_total(),
                                success=True)
        # save the transcation (otherwise doesn't exist)
        transaction.save()
    
        messages.info(request, "Thank you! Your purchase was successful!")
        return redirect(reverse('accounts:my_profile'))

请帮助困在这里

Answer 1

您尚未传递模型中提到的product的参数。而且由于您没有给它提供默认值，或者给了blank = True，所以您得到了不受NOT NULL约束的失败错误。

product = models.ForeignKey(Product,on_delete=models.CASCADE)

在此处传递产品对象。

transaction = Transaction(profile=request.user.profile,product = product, ...)

Answer 2

在您的transaction中更新您的view

我假设您的order_products是所有订购的products的列表

for i in order_products:
    transaction = Transaction(profile=request.user.profile,
                                product=i,
                                token=token,
                                order_id=order_to_purchase.id,
                                amount=order_to_purchase.get_cart_total(),
                                success=True)
     # save the transcation (otherwise doesn't exist)
     transaction.save()

位于/ cart / update-transaction / 0cqydz1f /的IntegrityError

models.py

views.py

2 个答案: