blob: 50d447951b58b23e51512c88adfdaa7c962ae2ba (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
from django.db import models
class Person(models.Model):
name = models.CharField(max_length=200)
class Movie(models.Model):
title = models.CharField(max_length=200)
director = models.ForeignKey(Person)
class Event(models.Model):
pass
class Screening(Event):
movie = models.ForeignKey(Movie)
class ScreeningNullFK(Event):
movie = models.ForeignKey(Movie, null=True)
class Package(models.Model):
screening = models.ForeignKey(Screening, null=True)
class PackageNullFK(models.Model):
screening = models.ForeignKey(ScreeningNullFK, null=True)
|
