django filter empty onetoone exists

1. Define the model and import the necessary modules:

from django.db import models

class Profile(models.Model):
    # fields

class User(models.Model):
    profile = models.OneToOneField(Profile, on_delete=models.CASCADE, null=True)

1. Use Django's exists method to filter for users with an associated profile:

from myapp.models import User

users_with_profile = User.objects.filter(profile__isnull=False)

1. Use Django's empty method to filter for users without an associated profile:

users_without_profile = User.objects.filter(profile__isnull=True)