问题描述
这并不总是这个代码块，但这是最近的。似乎是随机的，有什么想法？
It's not always this code chunk but this is the most recent. It seems to be random, any thoughts?
try:
u = User.objects.get(email__iexact=useremail)
except User.DoesNotExist:
...
随机抛出此错误。
File "/srv/myapp/registration/models.py", line 23, in get_or_create_user
u = User.objects.get(email__iexact=useremail)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/manager.py", line 132, in get
return self.get_query_set().get(*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 349, in get
% self.model._meta.object_name)
TypeError: ‘DoesNotExist’ object is not callable
推荐答案
正如Chris在上述评论中所说，您的代码段是有效的。您的代码中还有其他地方，您可能会错误地捕获异常。
As Chris says in the comments above, your snippet is valid. Somewhere else in your code, you may be catching exceptions incorrectly.
您可能会有以下情况：
try:
do_something()
except User.MultipleObjectsReturned, User.DoesNotExist:
pass
而不是：
try:
do_something()
except (User.MultipleObjectsReturned, User.DoesNotExist):
pass
没有括号中，except语句等同于以下Python 2.6+
Without the parentheses, the except statement is equivalent to the following in Python 2.6+
except User.MultipleObjectsReturned as User.DoesNotExist:
User.MultipleObjectsReturned 异常的实例覆盖 User.DoesNotExist 。
当相同的进程稍后处理不同的请求时，您将获得
TypeError ，因为您的代码正在尝试调用已替换 User.D的异常实例oesNotExist 。
When the same process handles a different request later on, you getthe TypeError because your code is trying to call the exception instance which has replaced User.DoesNotExist.
这篇关于TypeError：'DoesNotExist'对象不可调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！