from django.db import models from django.utils.encoding import python_2_unicode_compatible @python_2_unicode_compatible class User(models.Model): username = models.CharField(max_length=100) email = models.EmailField() def __str__(self): return self.username @python_2_unicode_compatible class UserProfile(models.Model): user = models.OneToOneField(User, models.CASCADE) city = models.CharField(max_length=100) state = models.CharField(max_length=2) def __str__(self): return "%s, %s" % (self.city, self.state) @python_2_unicode_compatible class UserStatResult(models.Model): results = models.CharField(max_length=50) def __str__(self): return 'UserStatResults, results = %s' % (self.results,) @python_2_unicode_compatible class UserStat(models.Model): user = models.OneToOneField(User, models.CASCADE, primary_key=True) posts = models.IntegerField() results = models.ForeignKey(UserStatResult, models.CASCADE) def __str__(self): return 'UserStat, posts = %s' % (self.posts,) @python_2_unicode_compatible class StatDetails(models.Model): base_stats = models.OneToOneField(UserStat, models.CASCADE) comments = models.IntegerField() def __str__(self): return 'StatDetails, comments = %s' % (self.comments,) class AdvancedUserStat(UserStat): karma = models.IntegerField() class Image(models.Model): name = models.CharField(max_length=100) class Product(models.Model): name = models.CharField(max_length=100) image = models.OneToOneField(Image, models.SET_NULL, null=True) @python_2_unicode_compatible class Parent1(models.Model): name1 = models.CharField(max_length=50) def __str__(self): return self.name1 @python_2_unicode_compatible class Parent2(models.Model): # Avoid having two "id" fields in the Child1 subclass id2 = models.AutoField(primary_key=True) name2 = models.CharField(max_length=50) def __str__(self): return self.name2 @python_2_unicode_compatible class Child1(Parent1, Parent2): value = models.IntegerField() def __str__(self): return self.name1 @python_2_unicode_compatible class Child2(Parent1): parent2 = models.OneToOneField(Parent2, models.CASCADE) value = models.IntegerField() def __str__(self): return self.name1 class Child3(Child2): value3 = models.IntegerField() class Child4(Child1): value4 = models.IntegerField() class LinkedList(models.Model): name = models.CharField(max_length=50) previous_item = models.OneToOneField( 'self', models.CASCADE, related_name='next_item', blank=True, null=True, )