models.py

from django.db import models
from django.contrib.auth.models import User


class Todo(models.Model):
    title = models.CharField(max_length=100, null=False, blank=False, default=None)
    description = models.TextField(null=False, blank=False, default=None)
    completed = models.BooleanField(default=False)
    created_at = models.DateTimeField(auto_now_add=True)
    user = models.ForeignKey(User, on_delete=models.CASCADE)

    def __str__(self):
        return str(self.title)