[PYTHON] How to add options to Django's manage.py runserver

What I tried to do

./manage.py runserver (--option)← Add options here

-I want to add new processing while keeping the existing operation in runserver

Override Command

app name/management/commands/runserver.py

from django.contrib.staticfiles.management.commands.runserver import Command as RunCommand

class Command(RunCommand):
       
       help = "Command itself(runserver)Explanation etc."

       def add_arguments(self, parser):
           super().add_arguments(parser)
        
           parser.add_argument(
            'option name',    help='--Sentence next to option at help'
        )
      
      def handle(self, *args, **options):

          #Process here

          super().handle(*args, **options)

-In the argument of * parser.add_argument *, you can set whether the command option to be created requires an argument. ・ There are other items that can be set with arguments.

It is not recognized even if I type a command (it does not appear in --help)

solution

-It seems that the app created here must be higher than the app overridden by INSTALLED_APPS in settings. (See [here] for details (https://docs.djangoproject.com/en/2.2/howto/custom-management-commands/#overriding-commands))

INSTALLED_APPS = [
    'app', #Change
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

Came out

・ This time, add with --example

 ./manage.py runserver --help
usage: manage.py runserver [-h] [--ipv6] [--nothreading] [--noreload]
                           [--nostatic] [--insecure] [--example] [--version]
                           [-v {0,1,2,3}] [--settings SETTINGS]
                           [--pythonpath PYTHONPATH] [--traceback]
                           [--no-color] [--force-color]
                           [addrport]

Starts a lightweight Web server for development and also serves static files.

positional arguments:
  addrport              Optional port number, or ipaddr:port

optional arguments:
  -h, --help            show this help message and exit
  --ipv6, -6            Tells Django to use an IPv6 address.
  --nothreading         Tells Django to NOT use threading.
  --noreload            Tells Django to NOT use the auto-reloader.
  --nostatic            Tells Django to NOT automatically serve static files
                        at STATIC_URL.
  --insecure            Allows serving static files even if DEBUG is False.
  --example             #This is the option added this time
  --version             show program's version number and exit
  -v {0,1,2,3}, --verbosity {0,1,2,3}
                        Verbosity level; 0=minimal output, 1=normal output,
                        2=verbose output, 3=very verbose output
  --settings SETTINGS   The Python path to a settings module, e.g.
                        "myproject.settings.main". If this isn't provided, the
                        DJANGO_SETTINGS_MODULE environment variable will be
                        used.
  --pythonpath PYTHONPATH
                        A directory to add to the Python path, e.g.
                        "/home/djangoprojects/myproject".
  --traceback           Raise on CommandError exceptions
  --no-color            Don't colorize the command output.
  --force-color         Force colorization of the command output.