Gettting the errror of my application can be served in heroku for django app-CodePudding

I am getting an error while deploying app on heroku

Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command
heroku logs --tail

Everything is working perfectly fine on heroku local

here are some of settings that I did

ALLOWED_HOSTS = ['0.0.0.0']

and here is Procfile

web: python manage.py runserver 0.0.0.0:$PORT

Here are my heroku logs

2022-07-10T16:25:15.788202 00:00 app[web.1]: The above exception was the direct cause of the following exception:
2022-07-10T16:25:15.788202 00:00 app[web.1]: 
2022-07-10T16:25:15.788210 00:00 app[web.1]: Traceback (most recent call last):
2022-07-10T16:25:15.788218 00:00 app[web.1]: File "/app/manage.py", line 22, in <module>
2022-07-10T16:25:15.788278 00:00 app[web.1]: main()
2022-07-10T16:25:15.788285 00:00 app[web.1]: File "/app/manage.py", line 18, in main
2022-07-10T16:25:15.788341 00:00 app[web.1]: execute_from_command_line(sys.argv)
2022-07-10T16:25:15.788349 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
2022-07-10T16:25:15.788475 00:00 app[web.1]: utility.execute()
2022-07-10T16:25:15.788483 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/__init__.py", line 440, in execute
2022-07-10T16:25:15.788599 00:00 app[web.1]: self.fetch_command(subcommand).run_from_argv(self.argv)
2022-07-10T16:25:15.788606 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/base.py", line 414, in run_from_argv
2022-07-10T16:25:15.788717 00:00 app[web.1]: self.execute(*args, **cmd_options)
2022-07-10T16:25:15.788725 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 74, in execute
2022-07-10T16:25:15.788789 00:00 app[web.1]: super().execute(*args, **options)
2022-07-10T16:25:15.788797 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/base.py", line 460, in execute
2022-07-10T16:25:15.788909 00:00 app[web.1]: output = self.handle(*args, **options)
2022-07-10T16:25:15.788916 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 81, in handle
2022-07-10T16:25:15.788980 00:00 app[web.1]: if not settings.DEBUG and not settings.ALLOWED_HOSTS:
2022-07-10T16:25:15.788987 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 87, in __getattr__
2022-07-10T16:25:15.789055 00:00 app[web.1]: self._setup(name)
2022-07-10T16:25:15.789062 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 74, in _setup
2022-07-10T16:25:15.789135 00:00 app[web.1]: self._wrapped = Settings(settings_module)
2022-07-10T16:25:15.789142 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 183, in __init__
2022-07-10T16:25:15.789219 00:00 app[web.1]: mod = importlib.import_module(self.SETTINGS_MODULE)
2022-07-10T16:25:15.789226 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/importlib/__init__.py", line 126, in import_module
2022-07-10T16:25:15.789298 00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-07-10T16:25:15.789305 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
2022-07-10T16:25:15.789371 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
2022-07-10T16:25:15.789411 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
2022-07-10T16:25:15.789450 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
2022-07-10T16:25:15.789489 00:00 app[web.1]: File "<frozen importlib._bootstrap_external>", line 883, in exec_module
2022-07-10T16:25:15.789535 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
2022-07-10T16:25:15.789574 00:00 app[web.1]: File "/app/authentication/settings.py", line 98, in <module>
2022-07-10T16:25:15.789645 00:00 app[web.1]: 'NAME': env('DATABASE_NAME'),
2022-07-10T16:25:15.789652 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/environ/environ.py", line 197, in __call__
2022-07-10T16:25:15.789736 00:00 app[web.1]: return self.get_value(
2022-07-10T16:25:15.789743 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/environ/environ.py", line 407, in get_value
2022-07-10T16:25:15.789852 00:00 app[web.1]: raise ImproperlyConfigured(error_msg) from exc
2022-07-10T16:25:15.789898 00:00 app[web.1]: django.core.exceptions.ImproperlyConfigured: Set the DATABASE_NAME environment variable
2022-07-10T16:25:15.946054 00:00 heroku[web.1]: Process exited with status 1
2022-07-10T16:25:16.065755 00:00 heroku[web.1]: State changed from starting to crashed
2022-07-10T16:25:16.070616 00:00 heroku[web.1]: State changed from crashed to starting
2022-07-10T16:25:20.000000 00:00 app[api]: Build succeeded
2022-07-10T16:25:20.067039 00:00 heroku[web.1]: Starting process with command `python manage.py runserver 0.0.0.0:37161`
2022-07-10T16:25:21.237371 00:00 app[web.1]: Traceback (most recent call last):
2022-07-10T16:25:21.237385 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/environ/environ.py", line 403, in get_value
2022-07-10T16:25:21.237547 00:00 app[web.1]: value = self.ENVIRON[var_name]
2022-07-10T16:25:21.237555 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/os.py", line 679, in __getitem__
2022-07-10T16:25:21.237770 00:00 app[web.1]: raise KeyError(key) from None
2022-07-10T16:25:21.237797 00:00 app[web.1]: KeyError: 'DATABASE_NAME'
2022-07-10T16:25:21.237799 00:00 app[web.1]: 
2022-07-10T16:25:21.237799 00:00 app[web.1]: The above exception was the direct cause of the following exception:
2022-07-10T16:25:21.237799 00:00 app[web.1]: 
2022-07-10T16:25:21.237802 00:00 app[web.1]: Traceback (most recent call last):
2022-07-10T16:25:21.237811 00:00 app[web.1]: File "/app/manage.py", line 22, in <module>
2022-07-10T16:25:21.237879 00:00 app[web.1]: main()
2022-07-10T16:25:21.237881 00:00 app[web.1]: File "/app/manage.py", line 18, in main
2022-07-10T16:25:21.237946 00:00 app[web.1]: execute_from_command_line(sys.argv)
2022-07-10T16:25:21.237953 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/__init__.py", line 446, in execute_from_command_line
2022-07-10T16:25:21.238093 00:00 app[web.1]: utility.execute()
2022-07-10T16:25:21.238101 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/__init__.py", line 440, in execute
2022-07-10T16:25:21.238231 00:00 app[web.1]: self.fetch_command(subcommand).run_from_argv(self.argv)
2022-07-10T16:25:21.238240 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/base.py", line 414, in run_from_argv
2022-07-10T16:25:21.238392 00:00 app[web.1]: self.execute(*args, **cmd_options)
2022-07-10T16:25:21.238408 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 74, in execute
2022-07-10T16:25:21.238490 00:00 app[web.1]: super().execute(*args, **options)
2022-07-10T16:25:21.238492 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/base.py", line 460, in execute
2022-07-10T16:25:21.238623 00:00 app[web.1]: output = self.handle(*args, **options)
2022-07-10T16:25:21.238631 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 81, in handle
2022-07-10T16:25:21.238705 00:00 app[web.1]: if not settings.DEBUG and not settings.ALLOWED_HOSTS:
2022-07-10T16:25:21.238713 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 87, in __getattr__
2022-07-10T16:25:21.238787 00:00 app[web.1]: self._setup(name)
2022-07-10T16:25:21.238795 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 74, in _setup
2022-07-10T16:25:21.238865 00:00 app[web.1]: self._wrapped = Settings(settings_module)
2022-07-10T16:25:21.238873 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/django/conf/__init__.py", line 183, in __init__
2022-07-10T16:25:21.238981 00:00 app[web.1]: mod = importlib.import_module(self.SETTINGS_MODULE)
2022-07-10T16:25:21.238983 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/importlib/__init__.py", line 126, in import_module
2022-07-10T16:25:21.239083 00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-07-10T16:25:21.239094 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
2022-07-10T16:25:21.239164 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
2022-07-10T16:25:21.239210 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
2022-07-10T16:25:21.239272 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
2022-07-10T16:25:21.239314 00:00 app[web.1]: File "<frozen importlib._bootstrap_external>", line 883, in exec_module
2022-07-10T16:25:21.239367 00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
2022-07-10T16:25:21.239438 00:00 app[web.1]: File "/app/authentication/settings.py", line 98, in <module>
2022-07-10T16:25:21.239526 00:00 app[web.1]: 'NAME': env('DATABASE_NAME'),
2022-07-10T16:25:21.239528 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/environ/environ.py", line 197, in __call__
2022-07-10T16:25:21.239624 00:00 app[web.1]: return self.get_value(
2022-07-10T16:25:21.239633 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.10/site-packages/environ/environ.py", line 407, in get_value
2022-07-10T16:25:21.239756 00:00 app[web.1]: raise ImproperlyConfigured(error_msg) from exc
2022-07-10T16:25:21.239777 00:00 app[web.1]: django.core.exceptions.ImproperlyConfigured: Set the DATABASE_NAME environment variable
2022-07-10T16:25:21.387335 00:00 heroku[web.1]: Process exited with status 1
2022-07-10T16:25:21.433687 00:00 heroku[web.1]: State changed from starting to crashed
2022-07-10T16:25:22.244946 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=noorauth.herokuapp.com request_id=955f478f-323f-4a40-8fdc-38028f4f40b8 fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=https
2022-07-10T16:25:22.534127 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=noorauth.herokuapp.com request_id=7f6694f9-8224-46be-b742-c20078077222 fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=https
2022-07-10T16:26:01.095161 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=noorauth.herokuapp.com request_id=542f9404-c45a-4264-832f-f0e4db52408c fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=https
2022-07-10T16:26:01.670778 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=noorauth.herokuapp.com request_id=a2e698a4-2547-4577-bc07-9b2d22293de5 fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=https
2022-07-10T16:29:59.391310 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=noorauth.herokuapp.com request_id=27902494-85e4-4f36-bbaa-89ae7e2895c2 fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=http
2022-07-10T16:30:00.717408 00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=noorauth.herokuapp.com request_id=17f3bab1-2105-4677-8b94-3c2a05456c04 fwd="103.184.0.73" dyno= connect= service= status=503 bytes= protocol=http

The errors tells about the database name and everything that I have stored in .env file, what should I do, I can;t find ay help regarding the databses when deploying the app.

CodePudding user response：

Your traceback is telling you that the 'DATABASE_NAME' environment variable has not been set, you can set that within your Heroku configuration.

https://devcenter.heroku.com/articles/config-vars

Another point is that your allowed hosts only has '0.0.0.0', you will need to include your Heroku app URL in there as well, or your custom URL if you are using a DNS provider.