django update field after save

# models.py
from django.db import models

class YourModel(models.Model):
    your_field = models.CharField(max_length=255)

# signals.py
from django.db.models.signals import post_save
from django.dispatch import receiver
from .models import YourModel

@receiver(post_save, sender=YourModel)
def update_field_after_save(sender, instance, created, kwargs):
    if created:
        instance.your_field = "Updated Value"
        instance.save()

# apps.py
from django.apps import AppConfig

class YourAppConfig(AppConfig):
    default_auto_field = 'django.db.models.BigAutoField'
    name = 'your_app'

    def ready(self):
        import your_app.signals  # noqa

# settings.py
INSTALLED_APPS = [
    # ...
    'your_app.apps.YourAppConfig',
    # ...
]