mirror of
https://github.com/django/django.git
synced 2025-10-26 07:06:08 +00:00
35 lines
834 B
Python
35 lines
834 B
Python
from django.db import models
|
|
|
|
|
|
class School(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
|
|
|
|
class Parent(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
|
|
|
|
class Child(models.Model):
|
|
mother = models.ForeignKey(Parent, models.CASCADE, related_name='mothers_children')
|
|
father = models.ForeignKey(Parent, models.CASCADE, related_name='fathers_children')
|
|
school = models.ForeignKey(School, models.CASCADE)
|
|
name = models.CharField(max_length=100)
|
|
|
|
|
|
class Poet(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Poem(models.Model):
|
|
poet = models.ForeignKey(Poet, models.CASCADE)
|
|
name = models.CharField(max_length=100)
|
|
|
|
class Meta:
|
|
unique_together = ('poet', 'name')
|
|
|
|
def __str__(self):
|
|
return self.name
|