起きたこと

「Chapter10 Djangoに認証機能を追加する」を進めていたときに本に沿って以下を実行したところエラーが表示された。

ターミナル

python manage.py startapp accounts

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 "python3.8/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "python3.8/site-packages/django/core/management/__init__.py", line 420, in execute
    django.setup()
  File "python3.8/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "python3.8/site-packages/django/apps/registry.py", line 91, in populate
    app_config = AppConfig.create(entry)
  File "python3.8/site-packages/django/apps/config.py", line 178, in create
    mod = import_module(mod_path)
  File "python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'accounts'

原因

上記コマンド実行の前にリスト10．1のコード入力をしてしまっていたのが原因。

どうやらstartapp hogehogeする前にsetting.pyやsetting_commonn.pyに追加するアプリを入力してしまうとエラーを吐き出してしまう様子。

対策

本の順番に進める