[Django]-Django Create and Save Many instances of model when another object are created

Using save():

If you want to use the save() method, you could do the following:

def save(self, *args, **kwargs):
    OtherModel.objects.create(something=kwargs['something'])
    YetAnotherModel.objects.create(
        something_else=kwargs['something_else']
    )
    super(ChessParty, self).save(*args, **kwargs)

As @e4c5 states in his comment, it is easier to implement and that is why I include it!

My take on the problem:

Although you could do this on the save(), I would recommend instead to use a signal.

Specifically use a post_save signal. Here is how to do this:

Create a file your_app/signals.py:

from django.db.models.signals import post_save
from django.dispatch import receiver

from your_app.models import ChessParty, OtherModel, YetAnotherModel


@receiver(post_save, sender=ChessParty)
def change_my_name_plz (sender, instance, created, **kwargs):
    if created:
        OtherModel.objects.create(something=kwargs['something'])
        YetAnotherModel.objects.create(
            something_else=kwargs['something_else']
        )

You now need to override the ready() function on your_app/app.py:

from django.apps import AppConfig

class YourAppConfig(AppConfig):
    name = 'your_project.your_app'

    def ready(self):
        import your_project.your_app.signals

Finally, add the following in your_app/__init__.py:

default_app_config = 'your_project.your_app.apps.YourAppConfig'

Now you have a signal that will create an OtherModel and YetAnotherModel objects right after you create a new ChessParty object.

Alternative way to define signals:

There is an alternative way that does not use the @receiver decorator, but the connect() method:

your_app/signals.py:

from your_app.models import ChessParty, OtherModel, YetAnotherModel


def change_my_name_plz (sender, instance, created, **kwargs):
    if created:
        OtherModel.objects.create(something=kwargs['something'])
        YetAnotherModel.objects.create(
            something_else=kwargs['something_else']
        )

your_app/app.py:

from django.apps import AppConfig
from django.db.models.signals import post_save

from your_app.models import ChessParty
from your_project.your_app.signals import change_my_name_plz

class YourAppConfig(AppConfig):
    name = 'your_project.your_app'

    def ready(self):
        post_save.connect(change_my_name_plz, sender=ChessParty)