class Book(models.Model):
name = models.CharField(max_length=100)
author = models.CharField(max_length=100)
id = models.CompositeField(author, name, primary_key=True)
def __unicode__(self):
return u"%s (by %s)" % (self.name, self.author)
class BookLibraryM2M(models.Model):
book = models.ForeignKey(Book)
library = models.ForeignKey(Library)
id = models.CompositeField(book, library, primary_key=True)
class Meta:
auto_created = Library
class Author(models.Model):
name = models.CharField(max_length=100)
age = models.IntegerField()
friends = models.ManyToManyField('self', blank=True)
id = models.CompositeField(name, age, primary_key=True)
def __unicode__(self):
return self.name
class Employee(models.Model):
employee_code = models.IntegerField(db_column='code')
first_name = models.CharField(max_length=20)
last_name = models.CharField(max_length=20)
id = models.CompositeField(employee_code, last_name, primary_key=True)
class Meta:
ordering = ('last_name', 'first_name')
def __unicode__(self):
return u"%s %s" % (self.first_name, self.last_name)
class AbstractChapter(models.Model):
author = models.CharField(max_length=100,
db_column="b1_author",
name="_author")
name = models.CharField(max_length=100, db_column="b1_name", name="_name")
book = models.ForeignKey(Book,
fields=(author, name),
related_name="chapter_set")
num = models.PositiveSmallIntegerField()
title = models.CharField(max_length=100)
id = models.CompositeField(book, num, primary_key=True)
class Meta:
abstract = True
def __unicode__(self):
return u"%s (%s) %s" % (self._name, self.num, self._author)