models.py

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


class TodoList(models.Model):
	name = models.CharField('List Title', max_length=200)
	author = models.ForeignKey(User, related_name='todo_lists')


class TodoItem(models.Model):
	text = models.TextField('Item Text')
	todo_list = models.ForeignKey(TodoList, related_name='items')