问题描述
我正在尝试显示与每个登录用户匹配的所有订单，我不明白为什么在尝试过滤用户时会出现问题，因为它让我发现 UserCheckout 没有任何匹配的查询：
订单/视图.py
class OrderList(LoginrequiredMixin,ListView):
queryset = Order.objects.all()
def get_queryset(self):
user_check_id = self.request.user.id
user_checkout = UserCheckout.objects.get(id=user_check_id)
return super(OrderList,self).get_queryset().filter(user=user_checkout)
订单/mixins.py
class LoginrequiredMixin(object):
@method_decorator(login_required)
def dispatch(self,request,*args,**kwargs):
return super(LoginrequiredMixin,self).dispatch(request,**kwargs)
订单/模型.py
class UserCheckout(models.Model):
user = models.OnetoOneField(settings.AUTH_USER_MODEL,null=True,blank=True,on_delete = models.CASCADE) # not required as to allow guests to checkout too
email = models.EmailField(unique=True) # required,unique as if there the guest already has an authentication just one email needed
def __str__(self):
return self.email
class Order(models.Model):
status = models.CharField(max_length=120,choices=ORDER_STATUS_CHOICES,default='created')
cart = models.ForeignKey(Cart,on_delete=models.CASCADE)
user = models.ForeignKey(UserCheckout,on_delete=models.CASCADE)
billing_address = models.ForeignKey(UserAddress,related_name='billing_address',on_delete=models.CASCADE)
shipping_address = models.ForeignKey(UserAddress,related_name='shipping_address',on_delete=models.CASCADE)
shipping_total_price = models.DecimalField(max_digits=50,decimal_places=2,default=5.99)
order_total = models.DecimalField(max_digits=50,decimal_places=2)
def __str__(self):
return str(self.cart.id)
它给我的错误：
DoesNotExist at /orders/
UserCheckout matching query does not exist.
解决方法
您收到错误，因为您尝试使用 User's 主键 (id) 作为 UserCheckout's 主键，即行：
user_check_id = self.request.user.id
user_checkout = UserCheckout.objects.get(id=user_check_id)
将这些行更改为：
user = self.request.user
user_checkout = UserCheckout.objects.get(user=user)
如果 UserCheckout 实例不存在，这也可能抛出异常，您可以使用 try-except 或使用 django 的快捷功能get_object_or_404来捕获该异常：
from django.shortcuts import get_object_or_404
user_checkout = get_object_or_404(UserCheckout,user=user)