1 from django
.db
import models
4 class Country(models
.Model
):
5 name
= models
.CharField(max_length
=255)
6 iso_two_letter
= models
.CharField(max_length
=2)
8 class Place(models
.Model
):
9 name
= models
.CharField(max_length
=100)
14 class Restaurant(Place
):
17 class Pizzeria(Restaurant
):
20 class State(models
.Model
):
21 two_letter_code
= models
.CharField(max_length
=2, primary_key
=True)
23 class TwoFields(models
.Model
):
24 f1
= models
.IntegerField(unique
=True)
25 f2
= models
.IntegerField(unique
=True)