Django: automatically delete records

I am trying to delete records in real time or automatically similar to this

As i have understand (I am a newbie) you need write a management command but I am having a hard time grasping the concept and how can it be in real time? Can someone point me in the right direction? I am very confused. Thank you in advance.

Everything you want to know about custom Django commands can be found in the docs: https://docs.djangoproject.com/en/1.8/howto/custom-management-commands/

Basically, you need to create a management/commands directory, so your folder structure looks like this:

app/
    ... (some stuff you're having in your app directory)
    management/
        __init__.py
        commands/
            __init__.py
            delete_all.py

Now in delete_all.py you want to declare a new command class extending BaseCommand and responsible for all your logic. The easiest implementation of such will look like this:

# delete_all.py
from django.core.management.base import BaseCommand
from app.models import MyModel


class Command(BaseCommand):
    def handle(self, *args, **options):
        print('Deleting all MyModel records!')
        MyModel.objects.all().delete()
        print('Successfully deleted all MyModel records!')

Now you can access your command with manage.py:

python manage.py delete_all