Custom commands

Folders

app_fossils
    management
        __init__.py
        commands
            __init__.py
            my_custom_command.py

Name your custom command with a descriptive name, something that reflects its functionality.

my_custom_command.py

from django.core.management.base import BaseCommand
from django.contrib.auth.models import User

class Command(BaseCommand):
    def handle(self, *args, **options):
      print('Do your thing!')

Run the command

python manage.py my_custom_command

Optional command scheduler

You can schedule your custom commands at specific times or intervals. You can use a third-party library like Celery or Django Q.

If your project is hosted on a platform that supports scheduling, such as Heroku, you can utilize their built-in schedulers instead of implementing your own. This is a simple and efficient solution that can save you time and effort. For example, if you host your project on Heroku, you can use their scheduler add-on ( https://devcenter.heroku.com/articles/scheduler ) to schedule tasks to run at specified intervals.

EXAMPLE

Folders

app_fossils
    management
        __init__.py
        commands
            __init__.py
            all_users_wealth.py

all_users_wealth.py

from django.core.management.base import BaseCommand
from django.contrib.auth.models import User
from django.db.models import Sum
import json

from app_fossils.models import DBFossil

class Command(BaseCommand):
    def handle(self, *args, **options):
        all_users_wealth = []
        users = User.objects.all()
        for usr in users:
            total_value = DBFossil.objects.filter(fossil_owner=usr).aggregate(Sum('fossil_value'))['fossil_value__sum']
            total_value = float(total_value) if total_value is not None else 0
            all_users_wealth.append({'user': usr.username, 'wealth': total_value})

        with open('all_users_wealth.json', 'w') as f:
            json.dump(all_users_wealth, f)

Run the command

python manage.py all_users_wealth