Question

我有一个 CarRent 模型，它是 Car 模型的外键，付款后在 CarRent detailView 上我想更改 CarRent 模型和 Car 模型，代码适用于 CarRent 模型，但更改 Car模型导致“AttributeError at /car/requests/4/ 类型对象“汽车”没有属性“对象””错误

class Car(models.Model):
    
    car_owner = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='car_owner', on_delete=models.CASCADE)
    car_model = models.CharField(max_length=20, blank=True, null=True)
    rented = models.BooleanField(default=False)



class CarRent(models.Model):

    car = models.ForeignKey(Car, related_name='rented_car', on_delete=models.CASCADE)
    driver = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='driver_renting', on_delete=models.CASCADE)
    active_rent = models.BooleanField(default=False, null=True)
    rent_paid = models.BooleanField(default=False)



@login_required
@driver_required(redirect_field_name='app:home')
@csrf_protect
def car_rent_detail_view(request, pk):
    object = get_object_or_404(CarRent, id=pk)

    # queryset = Car.objects.get(id=pk)
    car_object = get_object_or_404(queryset, id=pk)

    paystack = PaystackAccount(
        settings.PAYSTACK_EMAIL,
        settings.PAYSTACK_PUBLIC_KEY,
        object.total_cost
    )


    context = {'object': object, 'pk_public': settings.PAYSTACK_PUBLIC_KEY, 'currency': 'NGN', 'paystack': paystack,
               }


    if request.method == 'POST':
        if paystack.verify_transaction(request.POST['reference']):
            messages.success(request, "paystack payment successfull")
            car_rented = Car.object.get(pk=pk)
            car_rented.rented = True

            rent_activation = CarRent.objects.get(pk=pk)
            rent_activation.active_rent = True
            rent_activation.rent_paid = True
            rent_activation.save()
            messages.success(request, "Your Rent has successfully being updated")

    return render(request, 'app/CarRent_detail.html', context=context)

任何帮助将不胜感激。

Answer 1

这是一个错字，您需要使用 objects 来访问管理器方法，而不是对象。所以替换：

car_rented = Car.object.get(pk=pk)
                 ^^^^^^

与：

car_rented = Car.objects.get(rented_car__pk=pk)

您可以通过 related_name（即 'rented_car'）将查询从汽车模型反向查询到 CarRent。可以在 documentation 中找到更多信息。

尝试更改 django detailView 上的相关模型时出现属性错误

1 个答案: