Django JsonResponse：用户匹配查询不存在

Question

所以我尝试为我的模型制作一个 ajax，但它给了我一个匹配的查询不存在，这是完整的错误：

Internal Server Error: /messages/notification/
Traceback (most recent call last):
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\views\generic\base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\contrib\auth\mixins.py", line 52, in dispatch
    return super().dispatch(request, *args, **kwargs)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\views\generic\base.py", line 97, in dispatch
    return handler(request, *args, **kwargs)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\views\generic\detail.py", line 106, in get
    self.object = self.get_object()
File "C:\Users\berna\Desktop\Python & Javascript\Web development\MiFamiliaEsUnDesastre\mifamiliaesundesastre\chat\views.py", line 26, in get_object
    obj, created    = Thread.objects.get_or_new(self.request.user, other_username)
File "C:\Users\berna\Desktop\Python & Javascript\Web development\MiFamiliaEsUnDesastre\mifamiliaesundesastre\chat\models.py", line 29, in get_or_new
    user2 = Klass.objects.get(username=other_username)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\berna\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\query.py", line 415, in get
    raise self.model.DoesNotExist(
django.contrib.auth.models.User.DoesNotExist: User matching query does not exist.
HTTP GET /messages/notification/ 500 [0.16, 127.0.0.1:56012]

这也是我的代码： 模型.py

class ProfileImage(models.Model):
    """
    Profile model
    """
    user = models.OneToOneField(
        verbose_name=_('User'),
        #to=settings.AUTH_USER_MODEL,
        to = User,
        related_name='profile',
        on_delete=models.CASCADE
    )
    avatar = models.ImageField(upload_to='profile_image')
    notifications = models.FloatField(default='0')

views.py

def notifications(request, user_id, *args, **kwargs):
    user = User.objects.get(pk=user_id)
    user.profile.notifications = user.profile.notifications + 1
    user.save()
    return JsonResponse(data=user.profile.notifications, safe=False)

urls.py

path('messages/notification/', notifications)

我的 ajax 调用的 html

// Add the notification val
$.get('notification/')

有人告诉我那是我没有用户，但是当我有用户时，我不知道发生了什么

Answer 1

您需要向视图发送user_id：

path('messages/notification/(?P<user_id>[a-zA-Z0-9/_\.-]*)', notifications)

和：

$.get('messages/notification/{{ user.pk }}')

更新

您必须知道他们的用户 ID 才能收到他们的通知：

$.get('messages/notification/12234')

我假设你在某处有一个用户模型？

另外，user_id 是以字符串形式出现的，所以需要 int() 那个：

user = User.objects.get(pk=int(user_id))

或使用：

path('messages/notification/<int:user_id>', notifications)

Answer 2

所以对于后来看到这个的人来说，我所做的就是改变

path('messages/notification/', notifications)

到

url(r'^ajax/notification/$', notification),