from django.db.models.signals import pre_save
from django.dispatch import receiver
from random_id.utils import generate_random_string
from .models import Titolo

@receiver(pre_save, sender=Titolo)

def add_slug_to_id(sender, instance, *args, **kwargs):
    if instance and not instance.id:
        random_string = generate_random_string()
        instance.id = random_string