django - 如何导入 Django DoesNotExist 异常？

Question

我正在尝试创建一个单元测试来验证对象是否已被删除。

from django.utils import unittest
def test_z_Kallie_can_delete_discussion_response(self):
  ...snip...
  self._driver.get("http://localhost:8000/questions/3/want-a-discussion") 
  self.assertRaises(Answer.DoesNotExist, Answer.objects.get(body__exact = '<p>User can reply to discussion.</p>'))

我不断收到错误:

DoesNotExist: Answer matching query does not exist.

Answer 1

你也可以从 django.core.exceptions 中导入 ObjectDoesNotExist，如果你想要一个通用的、独立于模型的方法来捕获异常:

from django.core.exceptions import ObjectDoesNotExist

try:
    SomeModel.objects.get(pk=1)
except ObjectDoesNotExist:
    print 'Does Not Exist!'