from django.db import models class Place(models.Model): name = models.CharField(maxlength=50) address = models.CharField(maxlength=80) def __str__(self): return "%s the place" % self.name class Restaurant(models.Model): place = models.OneToOneField(Place) serves_hot_dogs = models.BooleanField() serves_pizza = models.BooleanField() def __str__(self): return "%s the restaurant" % self.place.name class Favorites(models.Model): name = models.CharField(maxlength = 50) restaurants = models.ManyToManyField(Restaurant) def __str__(self): return "Favorites for %s" % self.name API_TESTS = """ # Regression test for #1064 and #1506: Check that we create models via the m2m # relation if the remote model has a OneToOneField. >>> p1 = Place(name='Demon Dogs', address='944 W. Fullerton') >>> p1.save() >>> r = Restaurant(place=p1, serves_hot_dogs=True, serves_pizza=False) >>> r.save() >>> f = Favorites(name = 'Fred') >>> f.save() >>> f.restaurants = [r] >>> f.restaurants.all() [] """