[PYTHON] Add parameters to Django's custom commands

Introduction

Needless to say to Django experts, Django makes it easy to create custom commands!

$ python manage.py hoge

It is in the form of. The parts like runserver, migrate, and make migrations. This time I implemented it because I wanted to add a parameter after hoge, so share it with a memo

image

$ python manage.py hoge 1 2

environment

• Python 3.5.1
• Django==1.11

Implementation

$ django-admin.py startapp app

I will implement it on the assumption that I have created an app named ʻapp`.

app/
  ├── admin.py
  ├── apps.py
  ├── models.py
  ├── tests.py
  └── views.py

I think that it has a structure like that. If not changed

$ mkdir -p app/management/commands
$ cd app/management/commands
$ touch __init__.py
$ touch plus.py #Any name "plus" will be the custom command name

hoge.py

from django.core.management.base import BaseCommand, CommandError


class Command(BaseCommand):
    args = '<param_1 param_2 ...>'
    help = 'A command to display the total of parameters'

    def add_arguments(self, parser):
        parser.add_argument('parameters', nargs='+', type=int)

    def handle(self, *args, **options):
        print(sum(options['parameters']))

The above is an appropriate one for the time being, so it is a command that just adds parameters and displays it.

$ python manage.py plus 1 2 3 4
10

It should look like this!