return database_name == ':memory:' or 'mode=memory' in database_name TypeError: argument of type 'WindowsPath' is not iterable

Question:

I am practicing Django but when I command python manage.py makemigration and python manage.py migrate then I got an error as show in the title. the full error is mentioned below:

C:UsersMananpython projectsdjangoandmongonew_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:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangocoremanagement__init__.py", line 401, in
 execute_from_command_line
    utility.execute()
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangocoremanagement__init__.py", line 395, in
 execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangocoremanagementbase.py", line 341, in run
_from_argv
    connections.close_all()
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangodbutils.py", line 230, in close_all
    connection.close()
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangoutilsasyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangodbbackendssqlite3base.py", line 261, in
 close
    if not self.is_in_memory_db():
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangodbbackendssqlite3base.py", line 380, in
 is_in_memory_db
    return self.creation.is_in_memory_db(self.settings_dict['NAME'])
  File "C:UsersMananpython projectsdjangoandmongodandm_envlibsite-packagesdjangodbbackendssqlite3creation.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
Asked By: Mannan

||
Source

Answers:

It seems like the setting DATABASES – NAME expects a string, not a Path object.

In your settings try changing this line

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

to

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

so that NAME is a string instead of a Path.

The error comes from this line of code django/db/backends/sqlite3/creation.py#L13 and it seems that this commit solves the issue, so in Django v3.1.1 there is no need to use 'NAME': str(BASE_DIR / 'db.sqlite3'), anymore, just using 'NAME': BASE_DIR / 'db.sqlite3', should sufice.

Answered By: Ralf

I fixed this error by changing the line for database name in file settings.py to:

'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
Answered By: Valery Ryazanoff

I had a similar issue which I resolved by changing the owner of the files to the current owner and starting the server using the following command sudo -u <user_name> python3 manage.py runserver. It seems it’s a permission issue.

Answered By: farch

I had the same issue and resolved it by creating a virtual environment for the project. Run the following command to install the environment: python -m venv learn more from https://docs.python.org/3/tutorial/venv.htmlnv.html

Answered By: Alphamale