查不到数据会报错 :Book matching query does not exist. 2. 超过一个就报错 :returned more than one Book -- it returned 13! exclude() #排除 1.object能够调用,models.Book.objects.exclude(title__startswith='金梅') 2.queryset类型数据能够调用, models.Book.objects.all().exclude(title__startswith...
get_queryset(), name)(*args, **kwargs) File "/home/python/.virtualenvs/py3_django_1.11/lib/python3.5/site-packages/django/db/models/query.py", line 380, in get self.model._meta.object_name book.models.DoesNotExist: BookInfo matching query does not exist. >>> BookInfo.objects.all() ...
如果查询没有返回结果也会抛出异常: 1>>> Publisher.objects.get(name="Penguin")2Traceback (most recent call last):3...4DoesNotExist: Publisher matching query doesnotexist. 这个DoesNotExist异常 是 Publisher 这个 model 类的一个属性,即Publisher.DoesNotExist。在你的应用中,你可以捕获并处理这个异常,像这样...
return getattr(self.get_queryset(), name)(*args, **kwargs) File "D:\Codes\media\django\code001\venv\lib\site-packages\django\db\models\query.py", line 496, in get raise self.model.DoesNotExist( polls.models.Question.DoesNotExist: Question matching query does not exist. # 通过主键获取数据...
(self.get_queryset(), name)(*args, **kwargs) File "/home/python/.virtualenvs/py3_django_1.11/lib/python3.5/site-packages/django/db/models/query.py", line 380, in get self.model._meta.object_name book.models.DoesNotExist: BookInfo matching query does not exist. >>> BookInfo.objects....
UserDoesNotExist: instance matching query does not exist: SQL: SELECT t1."id", t1."username" FROM "user" AS t1 WHERE t1."username" = ? PARAMS: ['nobody'] 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
ERROR: test_returns_none_if_no_user_with_that_email [...] django.contrib.auth.models.DoesNotExist: User matching query does not exist. Which prompts us to finish the method like this: accounts/authentication.py (ch16l035). def get_user(self, email): try: return User.objects.get(email...
If the exception does have a silent_variable_failure attribute whose value is True, the variable will render as the value of the engine’s string_if_invalid configuration option (an empty string, by default). Example: >>> t = Template("My name is {{ person.first_name }}.") >>> ...
create_dir_if_not_there.py - Checks to see if a directory exists in the users home directory. If a directory does not exist, then one will be created. Fast Youtube Downloader - Downloads YouTube videos quickly with parallel threads using aria2c. Google Image Downloader - Query a given ...
to the outside of the block with the matching indentation. This logic isn't limited to the .call() method, you can use it with .apply() or any other method/property the function has assigned to it. This can be used for jQuery as well:$...