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