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from django.db import models
class Country(models.Model):
name = models.CharField(max_length=255)
iso_two_letter = models.CharField(max_length=2)
class Place(models.Model):
name = models.CharField(max_length=100)
class Meta:
abstract = True
class Restaurant(Place):
pass
class Pizzeria(Restaurant):
pass
class State(models.Model):
two_letter_code = models.CharField(max_length=2, primary_key=True)
class TwoFields(models.Model):
f1 = models.IntegerField(unique=True)
f2 = models.IntegerField(unique=True)
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