mirror of
https://github.com/django/django.git
synced 2024-12-22 17:16:24 +00:00
55 lines
1.2 KiB
Python
55 lines
1.2 KiB
Python
from django.db import models
|
|
|
|
|
|
class Tag(models.Model):
|
|
name = models.CharField(max_length=10)
|
|
parent = models.ForeignKey(
|
|
'self',
|
|
models.SET_NULL,
|
|
blank=True,
|
|
null=True,
|
|
related_name='children',
|
|
)
|
|
|
|
class Meta:
|
|
ordering = ['name']
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Celebrity(models.Model):
|
|
name = models.CharField("Name", max_length=20)
|
|
greatest_fan = models.ForeignKey(
|
|
"Fan",
|
|
models.SET_NULL,
|
|
null=True,
|
|
unique=True,
|
|
)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Fan(models.Model):
|
|
fan_of = models.ForeignKey(Celebrity, models.CASCADE)
|
|
|
|
|
|
class Staff(models.Model):
|
|
id = models.IntegerField(primary_key=True)
|
|
name = models.CharField(max_length=50)
|
|
organisation = models.CharField(max_length=100)
|
|
tags = models.ManyToManyField(Tag, through='StaffTag')
|
|
coworkers = models.ManyToManyField('self')
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class StaffTag(models.Model):
|
|
staff = models.ForeignKey(Staff, models.CASCADE)
|
|
tag = models.ForeignKey(Tag, models.CASCADE)
|
|
|
|
def __str__(self):
|
|
return "%s -> %s" % (self.tag, self.staff)
|