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HerokuにDjangoアプリをデプロイするときのエラーについての対処法

Last updated at Posted at 2019-04-30

#はじめに
HerokuにDjangoアプリケーションをデプロイする際に、静的ファイルに関する環境変数を設定してあげないとエラーが出ますよという話です。

#開発環境
OS:macOS Mojave(10.14.4)

#対処法
Djangoのチュートリアルに従って、デプロイに関する様々な設定(HerokuがPythonアプリであると認識するためのrequirements.txtやWebサーバーに関して宣言するProcfileなど諸々の設定)をし終えて、いざデプロイしようと以下のコマンドを打ちエラーが出たことはありませんか。

remote: -----> $ python manage.py collectstatic --noinput
remote:        Traceback (most recent call last):
remote:          File "manage.py", line 21, in <module>
remote:            main()
remote:          File "manage.py", line 17, in main
remote:            execute_from_command_line(sys.argv)
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
remote:            utility.execute()
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 325, in execute
remote:            settings.INSTALLED_APPS
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django/conf/__init__.py", line 79, in __getattr__
remote:            self._setup(name)
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django/conf/__init__.py", line 66, in _setup
remote:            self._wrapped = Settings(settings_module)
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django/conf/__init__.py", line 157, in __init__
remote:            mod = importlib.import_module(self.SETTINGS_MODULE)
remote:          File "/app/.heroku/python/lib/python3.6/importlib/__init__.py", line 126, in import_module
remote:          File "/tmp/build_ec7d7e8811f7736c2961572f243025b3/config/settings.py", line 151, in <module>
remote:            django_heroku.settings(locals())
remote:          File "/app/.heroku/python/lib/python3.6/site-packages/django_heroku/core.py", line 89, in settings
remote:            config['STATIC_ROOT'] = os.path.join(config['BASE_DIR'], 'staticfiles')
remote:        KeyError: 'BASE_DIR'
remote:
remote:  !     Error while running '$ python manage.py collectstatic --noinput'.
remote:        See traceback above for details.
remote:
remote:        You may need to update application code to resolve this error.
remote:        Or, you can disable collectstatic for this application:
remote:
remote:           $ heroku config:set DISABLE_COLLECTSTATIC=1
remote:
remote:        https://devcenter.heroku.com/articles/django-assets
remote:  !     Push rejected, failed to compile Python app.
remote:
remote:  !     Push failed
remote: Verifying deploy...
remote:
remote: !	Push rejected to hoge.
remote:
To https://git.heroku.com/hoge.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/hoge.git'

これは静的ファイルを扱うための(詳しくは、アプリケーションごとのstaticディレクトリを指定ディレクトリに集約コピーする)機能をもつcollectstaticが不要であれば、環境変数DISABLE_COLLECTSTATICを設定してくださいと言われているので、以下のコマンドを実行します。

$ heroku config:set DISABLE_COLLECTSTATIC=1
Setting DISABLE_COLLECTSTATIC and restarting  hrtech360... done, v3
DISABLE_COLLECTSTATIC: 1

これで再度pushするとエラーが無くなりデプロイが完了するかと思います。

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