mirror of
https://github.com/django/django.git
synced 2024-11-25 07:59:34 +01:00
124 lines
2.9 KiB
Python
124 lines
2.9 KiB
Python
import uuid
|
|
|
|
from django.db import models
|
|
|
|
|
|
class Event(models.Model):
|
|
# Oracle can have problems with a column named "date"
|
|
date = models.DateField(db_column="event_date")
|
|
|
|
|
|
class Parent(models.Model):
|
|
name = models.CharField(max_length=128)
|
|
|
|
|
|
class Child(models.Model):
|
|
parent = models.ForeignKey(Parent, models.SET_NULL, editable=False, null=True)
|
|
name = models.CharField(max_length=30, blank=True)
|
|
age = models.IntegerField(null=True, blank=True)
|
|
|
|
|
|
class Genre(models.Model):
|
|
name = models.CharField(max_length=20)
|
|
|
|
|
|
class Band(models.Model):
|
|
name = models.CharField(max_length=20)
|
|
nr_of_members = models.PositiveIntegerField()
|
|
genres = models.ManyToManyField(Genre)
|
|
|
|
|
|
class Musician(models.Model):
|
|
name = models.CharField(max_length=30)
|
|
age = models.IntegerField(null=True, blank=True)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Group(models.Model):
|
|
name = models.CharField(max_length=30)
|
|
members = models.ManyToManyField(Musician, through="Membership")
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class Concert(models.Model):
|
|
name = models.CharField(max_length=30)
|
|
group = models.ForeignKey(Group, models.CASCADE)
|
|
|
|
|
|
class Membership(models.Model):
|
|
music = models.ForeignKey(Musician, models.CASCADE)
|
|
group = models.ForeignKey(Group, models.CASCADE)
|
|
role = models.CharField(max_length=15)
|
|
|
|
|
|
class Quartet(Group):
|
|
pass
|
|
|
|
|
|
class ChordsMusician(Musician):
|
|
pass
|
|
|
|
|
|
class ChordsBand(models.Model):
|
|
name = models.CharField(max_length=30)
|
|
members = models.ManyToManyField(ChordsMusician, through="Invitation")
|
|
|
|
|
|
class Invitation(models.Model):
|
|
player = models.ForeignKey(ChordsMusician, models.CASCADE)
|
|
band = models.ForeignKey(ChordsBand, models.CASCADE)
|
|
instrument = models.CharField(max_length=15)
|
|
|
|
|
|
class Swallow(models.Model):
|
|
uuid = models.UUIDField(primary_key=True, default=uuid.uuid4)
|
|
origin = models.CharField(max_length=255)
|
|
load = models.FloatField()
|
|
speed = models.FloatField()
|
|
|
|
class Meta:
|
|
ordering = ("speed", "load")
|
|
|
|
|
|
class SwallowOneToOne(models.Model):
|
|
swallow = models.OneToOneField(Swallow, models.CASCADE)
|
|
|
|
|
|
class UnorderedObject(models.Model):
|
|
"""
|
|
Model without any defined `Meta.ordering`.
|
|
Refs #17198.
|
|
"""
|
|
|
|
bool = models.BooleanField(default=True)
|
|
|
|
|
|
class OrderedObjectManager(models.Manager):
|
|
def get_queryset(self):
|
|
return super().get_queryset().order_by("number")
|
|
|
|
|
|
class OrderedObject(models.Model):
|
|
"""
|
|
Model with Manager that defines a default order.
|
|
Refs #17198.
|
|
"""
|
|
|
|
name = models.CharField(max_length=255)
|
|
bool = models.BooleanField(default=True)
|
|
number = models.IntegerField(default=0, db_column="number_val")
|
|
|
|
objects = OrderedObjectManager()
|
|
|
|
|
|
class CustomIdUser(models.Model):
|
|
uuid = models.AutoField(primary_key=True)
|
|
|
|
|
|
class CharPK(models.Model):
|
|
char_pk = models.CharField(max_length=100, primary_key=True)
|