from django.db import models class Place(models.Model): name = models.CharField(max_length=50) address = models.CharField(max_length=80) def __unicode__(self): return u"%s the place" % self.name class Restaurant(models.Model): place = models.OneToOneField(Place) serves_hot_dogs = models.BooleanField() serves_pizza = models.BooleanField() def __unicode__(self): return u"%s the restaurant" % self.place.name class Bar(models.Model): place = models.OneToOneField(Place) serves_cocktails = models.BooleanField() def __unicode__(self): return u"%s the bar" % self.place.name class UndergroundBar(models.Model): place = models.OneToOneField(Place, null=True) serves_cocktails = models.BooleanField() class Favorites(models.Model): name = models.CharField(max_length = 50) restaurants = models.ManyToManyField(Restaurant) def __unicode__(self): return u"Favorites for %s" % self.name class Target(models.Model): pass class Pointer(models.Model): other = models.OneToOneField(Target, primary_key=True) class Pointer2(models.Model): other = models.OneToOneField(Target)