Question

我创建了一个LoggedInUser模型，并给了related_name。当我尝试访问时，它给我一个

错误

RelatedObjectDoesNotExist at /
User has no logged_in_user.

models.py

User = settings.AUTH_USER_MODEL

# Model to store the list of logged in users
class LoggedInUser(models.Model):
    user = models.OneToOneField(User, related_name='logged_in_user',on_delete=models.CASCADE)
    # Session keys are 32 characters long
    session_key = models.CharField(max_length=32, null=True, blank=True)

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

signals.py

@receiver(user_logged_in)
def on_user_logged_in(sender, request, **kwargs):
    LoggedInUser.objects.get_or_create(user=kwargs.get('user')) 


@receiver(user_logged_out)
def on_user_logged_out(sender, **kwargs):
    LoggedInUser.objects.filter(user=kwargs.get('user')).delete()

在自定义 middleware.py

中

stored_session_key = request.user.logged_in_user.session_key # Error in these line.

错误：

django.contrib.auth.models.User.logged_in_user.RelatedObjectDoesNotExist：用户没有“ login_in_user”。

版本：

django == 2.1.2

python == 3.6.7

我哪里出错了？

Answer 1

试试看

def on_user_logged_in(sender, request, **kwargs):
    u, created = LoggedInUser.objects.get_or_create(user=kwargs.get('user')) 
    u.save()

user_logged_in.connect(on_user_logged_in)

Django用户没有logging_in_user（related_name）不起作用

1 个答案: