from django.db import models from django.utils.encoding import python_2_unicode_compatible 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, 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) @python_2_unicode_compatible class Musician(models.Model): name = models.CharField(max_length=30) def __str__(self): return self.name @python_2_unicode_compatible 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) class Membership(models.Model): music = models.ForeignKey(Musician) group = models.ForeignKey(Group) 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) band = models.ForeignKey(ChordsBand) instrument = models.CharField(max_length=15) class Swallow(models.Model): origin = models.CharField(max_length=255) load = models.FloatField() speed = models.FloatField() class Meta: ordering = ('speed', 'load') 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(OrderedObjectManager, self).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)