Find new string for unique fields in django soft delete operation

find_deleted_string.py

# Standard Library
from typing import Dict

# Django Stuff
from django.apps import apps


def find_deleted_string(model_name: str, **kwargs) -> Dict[str, str]:
    parameters = {key: f"{value}<d>" if isinstance(value, str) else value for key, value in kwargs.items()}
    model_class = apps.get_model(model_name)
    if model_class.objects.filter(is_deleted__exact=True, **parameters).exists():
        return find_deleted_string(model_name=model_name, **parameters)
    return parameters



# Example usage: users/models.py
# class User(SoftDeleteModal):
#   username = models.CharField(unique=True, ...)
#   is_deleted = models.BooleanField(default=False)
#   ...
#   def delete(*args, **kwargs):
#     self.username = find_delete_string(model_name="users.User", username=self.username)["username"]
#     return super().delete(*args, **kwargs)

# Complex usage:
# new_fields = find_delete_string(model_name="users.User", username=self.username, email=self.email)
# new_username, new_email = new_fields["username"], new_fields["email"]