blob: c1b42f026ddc7389a625158768dde2e23be9efee (
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
from django.db import models
class Entity(models.Model):
pass
class Country(Entity):
name = models.CharField(max_length=30)
class EUCountry(Country):
join_date = models.DateField()
class City(models.Model):
name = models.CharField(max_length=30)
country = models.ForeignKey(Country, models.CASCADE)
class EUCity(models.Model):
name = models.CharField(max_length=30)
country = models.ForeignKey(EUCountry, models.CASCADE)
class CountryProxy(Country):
class Meta:
proxy = True
class CountryProxyProxy(CountryProxy):
class Meta:
proxy = True
class CityCountryProxy(models.Model):
country = models.ForeignKey(CountryProxyProxy, models.CASCADE)
class Person(models.Model):
name = models.CharField(max_length=30)
born = models.ForeignKey(City, models.CASCADE, related_name="+")
died = models.ForeignKey(City, models.CASCADE, related_name="+")
class PersonProfile(models.Model):
person = models.OneToOneField(Person, models.CASCADE, related_name="profile")
|
