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"""
33. get_or_create()
``get_or_create()`` does what it says: it tries to look up an object with the
given parameters. If an object isn't found, it creates one with the given
parameters.
"""
from __future__ import unicode_literals
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
@python_2_unicode_compatible
class Person(models.Model):
first_name = models.CharField(max_length=100)
last_name = models.CharField(max_length=100)
birthday = models.DateField()
def __str__(self):
return '%s %s' % (self.first_name, self.last_name)
class DefaultPerson(models.Model):
first_name = models.CharField(max_length=100, default="Anonymous")
class ManualPrimaryKeyTest(models.Model):
id = models.IntegerField(primary_key=True)
data = models.CharField(max_length=100)
class Profile(models.Model):
person = models.ForeignKey(Person, primary_key=True)
class Tag(models.Model):
text = models.CharField(max_length=255, unique=True)
class Thing(models.Model):
name = models.CharField(max_length=256)
tags = models.ManyToManyField(Tag)
class Publisher(models.Model):
name = models.CharField(max_length=100)
class Author(models.Model):
name = models.CharField(max_length=100)
class Book(models.Model):
name = models.CharField(max_length=100)
authors = models.ManyToManyField(Author, related_name='books')
publisher = models.ForeignKey(Publisher, related_name='books', db_column="publisher_id_column")
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