return database_name == ':memory:' or 'mode=memory' in database_name TypeError: 'WindowsPath' 类型的参数不可迭代

Question

您好，我是 python 和 django 的新手，我正在练习 django，但是当我命令 python manage.py makemigration 和 python manage.py migrate 时，我收到了标题中显示的错误。下面提到了完整的错误。

寻求帮助，谢谢

C:\Users\Manan\python projects\djangoandmongo\new_Socrai>python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying contenttypes.0001_initial... OK
  Applying auth.0001_initial... OK
  Applying admin.0001_initial... OK
  Applying admin.0002_logentry_remove_auto_add... OK
  Applying admin.0003_logentry_add_action_flag_choices... OK
  Applying contenttypes.0002_remove_content_type_name... OK
  Applying auth.0002_alter_permission_name_max_length... OK
  Applying auth.0003_alter_user_email_max_length... OK
  Applying auth.0004_alter_user_username_opts... OK
  Applying auth.0005_alter_user_last_login_null... OK
  Applying auth.0006_require_contenttypes_0002... OK
  Applying auth.0007_alter_validators_add_error_messages... OK
  Applying auth.0008_alter_user_username_max_length... OK
  Applying auth.0009_alter_user_last_name_max_length... OK
  Applying auth.0010_alter_group_name_max_length... OK
  Applying auth.0011_update_proxy_permissions... OK
  Applying sessions.0001_initial... OK
Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\core\management\__init__.py", line 401, in
 execute_from_command_line
    utility.execute()
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\core\management\__init__.py", line 395, in
 execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\core\management\base.py", line 341, in run
_from_argv
    connections.close_all()
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\db\utils.py", line 230, in close_all
    connection.close()
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\utils\asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\db\backends\sqlite3\base.py", line 261, in
 close
    if not self.is_in_memory_db():
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\db\backends\sqlite3\base.py", line 380, in
 is_in_memory_db
    return self.creation.is_in_memory_db(self.settings_dict['NAME'])
  File "C:\Users\Manan\python projects\djangoandmongo\dandm_env\lib\site-packages\django\db\backends\sqlite3\creation.py", line 12,
 in is_in_memory_db
    return database_name == ':memory:' or 'mode=memory' in database_name
TypeError: argument of type 'WindowsPath' is not iterable

Answer 1

我刚刚在这个问题中回答了同样的错误如何解决“WindowsPath”类型的参数在 django 中不可迭代？不打开任何 pdf 或 csv 文件

似乎设置DATABASES - NAME需要一个字符串，而不是一个Path对象。

在您的设置中尝试更改此行

'NAME': BASE_DIR / 'db.sqlite3',

到

'NAME': str(BASE_DIR / 'db.sqlite3'),

所以这NAME是一个字符串而不是一个Path.

错误来自这行代码django/db/backends/sqlite3/creation.py#L13，看来这次提交解决了问题，所以Django v3.1.1没有必要再使用'NAME': str(BASE_DIR / 'db.sqlite3'),了，使用'NAME': BASE_DIR / 'db.sqlite3',应该就足够了。