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Diffstat (limited to 'parts/django/tests/modeltests/model_inheritance')
3 files changed, 0 insertions, 426 deletions
diff --git a/parts/django/tests/modeltests/model_inheritance/__init__.py b/parts/django/tests/modeltests/model_inheritance/__init__.py deleted file mode 100644 index e69de29..0000000 --- a/parts/django/tests/modeltests/model_inheritance/__init__.py +++ /dev/null diff --git a/parts/django/tests/modeltests/model_inheritance/models.py b/parts/django/tests/modeltests/model_inheritance/models.py deleted file mode 100644 index 6cee512..0000000 --- a/parts/django/tests/modeltests/model_inheritance/models.py +++ /dev/null @@ -1,145 +0,0 @@ -""" -XX. Model inheritance - -Model inheritance exists in two varieties: - - abstract base classes which are a way of specifying common - information inherited by the subclasses. They don't exist as a separate - model. - - non-abstract base classes (the default), which are models in their own - right with their own database tables and everything. Their subclasses - have references back to them, created automatically. - -Both styles are demonstrated here. -""" - -from django.db import models - -# -# Abstract base classes -# - -class CommonInfo(models.Model): - name = models.CharField(max_length=50) - age = models.PositiveIntegerField() - - class Meta: - abstract = True - ordering = ['name'] - - def __unicode__(self): - return u'%s %s' % (self.__class__.__name__, self.name) - -class Worker(CommonInfo): - job = models.CharField(max_length=50) - -class Student(CommonInfo): - school_class = models.CharField(max_length=10) - - class Meta: - pass - -class StudentWorker(Student, Worker): - pass - -# -# Abstract base classes with related models -# - -class Post(models.Model): - title = models.CharField(max_length=50) - -class Attachment(models.Model): - post = models.ForeignKey(Post, related_name='attached_%(class)s_set') - content = models.TextField() - - class Meta: - abstract = True - - def __unicode__(self): - return self.content - -class Comment(Attachment): - is_spam = models.BooleanField() - -class Link(Attachment): - url = models.URLField() - -# -# Multi-table inheritance -# - -class Chef(models.Model): - name = models.CharField(max_length=50) - - def __unicode__(self): - return u"%s the chef" % self.name - -class Place(models.Model): - name = models.CharField(max_length=50) - address = models.CharField(max_length=80) - - def __unicode__(self): - return u"%s the place" % self.name - -class Rating(models.Model): - rating = models.IntegerField(null=True, blank=True) - - class Meta: - abstract = True - ordering = ['-rating'] - -class Restaurant(Place, Rating): - serves_hot_dogs = models.BooleanField() - serves_pizza = models.BooleanField() - chef = models.ForeignKey(Chef, null=True, blank=True) - - class Meta(Rating.Meta): - db_table = 'my_restaurant' - - def __unicode__(self): - return u"%s the restaurant" % self.name - -class ItalianRestaurant(Restaurant): - serves_gnocchi = models.BooleanField() - - def __unicode__(self): - return u"%s the italian restaurant" % self.name - -class Supplier(Place): - customers = models.ManyToManyField(Restaurant, related_name='provider') - - def __unicode__(self): - return u"%s the supplier" % self.name - -class ParkingLot(Place): - # An explicit link to the parent (we can control the attribute name). - parent = models.OneToOneField(Place, primary_key=True, parent_link=True) - main_site = models.ForeignKey(Place, related_name='lot') - - def __unicode__(self): - return u"%s the parking lot" % self.name - -# -# Abstract base classes with related models where the sub-class has the -# same name in a different app and inherits from the same abstract base -# class. -# NOTE: The actual API tests for the following classes are in -# model_inheritance_same_model_name/models.py - They are defined -# here in order to have the name conflict between apps -# - -class Title(models.Model): - title = models.CharField(max_length=50) - -class NamedURL(models.Model): - title = models.ForeignKey(Title, related_name='attached_%(app_label)s_%(class)s_set') - url = models.URLField() - - class Meta: - abstract = True - -class Copy(NamedURL): - content = models.TextField() - - def __unicode__(self): - return self.content diff --git a/parts/django/tests/modeltests/model_inheritance/tests.py b/parts/django/tests/modeltests/model_inheritance/tests.py deleted file mode 100644 index 80dd0de..0000000 --- a/parts/django/tests/modeltests/model_inheritance/tests.py +++ /dev/null @@ -1,281 +0,0 @@ -from operator import attrgetter - -from django.conf import settings -from django.core.exceptions import FieldError -from django.db import connection -from django.test import TestCase - -from models import (Chef, CommonInfo, ItalianRestaurant, ParkingLot, Place, - Post, Restaurant, Student, StudentWorker, Supplier, Worker) - - -class ModelInheritanceTests(TestCase): - def test_abstract(self): - # The Student and Worker models both have 'name' and 'age' fields on - # them and inherit the __unicode__() method, just as with normal Python - # subclassing. This is useful if you want to factor out common - # information for programming purposes, but still completely - # independent separate models at the database level. - w1 = Worker.objects.create(name="Fred", age=35, job="Quarry worker") - w2 = Worker.objects.create(name="Barney", age=34, job="Quarry worker") - - s = Student.objects.create(name="Pebbles", age=5, school_class="1B") - - self.assertEqual(unicode(w1), "Worker Fred") - self.assertEqual(unicode(s), "Student Pebbles") - - # The children inherit the Meta class of their parents (if they don't - # specify their own). - self.assertQuerysetEqual( - Worker.objects.values("name"), [ - {"name": "Barney"}, - {"name": "Fred"}, - ], - lambda o: o - ) - - # Since Student does not subclass CommonInfo's Meta, it has the effect - # of completely overriding it. So ordering by name doesn't take place - # for Students. - self.assertEqual(Student._meta.ordering, []) - - # However, the CommonInfo class cannot be used as a normal model (it - # doesn't exist as a model). - self.assertRaises(AttributeError, lambda: CommonInfo.objects.all()) - - # A StudentWorker which does not exist is both a Student and Worker - # which does not exist. - self.assertRaises(Student.DoesNotExist, - StudentWorker.objects.get, pk=12321321 - ) - self.assertRaises(Worker.DoesNotExist, - StudentWorker.objects.get, pk=12321321 - ) - - # MultipleObjectsReturned is also inherited. - # This is written out "long form", rather than using __init__/create() - # because of a bug with diamond inheritance (#10808) - sw1 = StudentWorker() - sw1.name = "Wilma" - sw1.age = 35 - sw1.save() - sw2 = StudentWorker() - sw2.name = "Betty" - sw2.age = 24 - sw2.save() - - self.assertRaises(Student.MultipleObjectsReturned, - StudentWorker.objects.get, pk__lt=sw2.pk + 100 - ) - self.assertRaises(Worker.MultipleObjectsReturned, - StudentWorker.objects.get, pk__lt=sw2.pk + 100 - ) - - def test_multiple_table(self): - post = Post.objects.create(title="Lorem Ipsum") - # The Post model has distinct accessors for the Comment and Link models. - post.attached_comment_set.create(content="Save $ on V1agr@", is_spam=True) - post.attached_link_set.create( - content="The Web framework for perfections with deadlines.", - url="http://www.djangoproject.com/" - ) - - # The Post model doesn't have an attribute called - # 'attached_%(class)s_set'. - self.assertRaises(AttributeError, - getattr, post, "attached_%(class)s_set" - ) - - # The Place/Restaurant/ItalianRestaurant models all exist as - # independent models. However, the subclasses also have transparent - # access to the fields of their ancestors. - # Create a couple of Places. - p1 = Place.objects.create(name="Master Shakes", address="666 W. Jersey") - p2 = Place.objects.create(name="Ace Harware", address="1013 N. Ashland") - - # Test constructor for Restaurant. - r = Restaurant.objects.create( - name="Demon Dogs", - address="944 W. Fullerton", - serves_hot_dogs=True, - serves_pizza=False, - rating=2 - ) - # Test the constructor for ItalianRestaurant. - c = Chef.objects.create(name="Albert") - ir = ItalianRestaurant.objects.create( - name="Ristorante Miron", - address="1234 W. Ash", - serves_hot_dogs=False, - serves_pizza=False, - serves_gnocchi=True, - rating=4, - chef=c - ) - self.assertQuerysetEqual( - ItalianRestaurant.objects.filter(address="1234 W. Ash"), [ - "Ristorante Miron", - ], - attrgetter("name") - ) - ir.address = "1234 W. Elm" - ir.save() - self.assertQuerysetEqual( - ItalianRestaurant.objects.filter(address="1234 W. Elm"), [ - "Ristorante Miron", - ], - attrgetter("name") - ) - - # Make sure Restaurant and ItalianRestaurant have the right fields in - # the right order. - self.assertEqual( - [f.name for f in Restaurant._meta.fields], - ["id", "name", "address", "place_ptr", "rating", "serves_hot_dogs", "serves_pizza", "chef"] - ) - self.assertEqual( - [f.name for f in ItalianRestaurant._meta.fields], - ["id", "name", "address", "place_ptr", "rating", "serves_hot_dogs", "serves_pizza", "chef", "restaurant_ptr", "serves_gnocchi"], - ) - self.assertEqual(Restaurant._meta.ordering, ["-rating"]) - - # Even though p.supplier for a Place 'p' (a parent of a Supplier), a - # Restaurant object cannot access that reverse relation, since it's not - # part of the Place-Supplier Hierarchy. - self.assertQuerysetEqual(Place.objects.filter(supplier__name="foo"), []) - self.assertRaises(FieldError, - Restaurant.objects.filter, supplier__name="foo" - ) - - # Parent fields can be used directly in filters on the child model. - self.assertQuerysetEqual( - Restaurant.objects.filter(name="Demon Dogs"), [ - "Demon Dogs", - ], - attrgetter("name") - ) - self.assertQuerysetEqual( - ItalianRestaurant.objects.filter(address="1234 W. Elm"), [ - "Ristorante Miron", - ], - attrgetter("name") - ) - - # Filters against the parent model return objects of the parent's type. - p = Place.objects.get(name="Demon Dogs") - self.assertTrue(type(p) is Place) - - # Since the parent and child are linked by an automatically created - # OneToOneField, you can get from the parent to the child by using the - # child's name. - self.assertEqual( - p.restaurant, Restaurant.objects.get(name="Demon Dogs") - ) - self.assertEqual( - Place.objects.get(name="Ristorante Miron").restaurant.italianrestaurant, - ItalianRestaurant.objects.get(name="Ristorante Miron") - ) - self.assertEqual( - Restaurant.objects.get(name="Ristorante Miron").italianrestaurant, - ItalianRestaurant.objects.get(name="Ristorante Miron") - ) - - # This won't work because the Demon Dogs restaurant is not an Italian - # restaurant. - self.assertRaises(ItalianRestaurant.DoesNotExist, - lambda: p.restaurant.italianrestaurant - ) - # An ItalianRestaurant which does not exist is also a Place which does - # not exist. - self.assertRaises(Place.DoesNotExist, - ItalianRestaurant.objects.get, name="The Noodle Void" - ) - # MultipleObjectsReturned is also inherited. - self.assertRaises(Place.MultipleObjectsReturned, - Restaurant.objects.get, id__lt=12321 - ) - - # Related objects work just as they normally do. - s1 = Supplier.objects.create(name="Joe's Chickens", address="123 Sesame St") - s1.customers = [r, ir] - s2 = Supplier.objects.create(name="Luigi's Pasta", address="456 Sesame St") - s2.customers = [ir] - - # This won't work because the Place we select is not a Restaurant (it's - # a Supplier). - p = Place.objects.get(name="Joe's Chickens") - self.assertRaises(Restaurant.DoesNotExist, - lambda: p.restaurant - ) - - self.assertEqual(p.supplier, s1) - self.assertQuerysetEqual( - ir.provider.order_by("-name"), [ - "Luigi's Pasta", - "Joe's Chickens" - ], - attrgetter("name") - ) - self.assertQuerysetEqual( - Restaurant.objects.filter(provider__name__contains="Chickens"), [ - "Ristorante Miron", - "Demon Dogs", - ], - attrgetter("name") - ) - self.assertQuerysetEqual( - ItalianRestaurant.objects.filter(provider__name__contains="Chickens"), [ - "Ristorante Miron", - ], - attrgetter("name"), - ) - - park1 = ParkingLot.objects.create( - name="Main St", address="111 Main St", main_site=s1 - ) - park2 = ParkingLot.objects.create( - name="Well Lit", address="124 Sesame St", main_site=ir - ) - - self.assertEqual( - Restaurant.objects.get(lot__name="Well Lit").name, - "Ristorante Miron" - ) - - # The update() command can update fields in parent and child classes at - # once (although it executed multiple SQL queries to do so). - rows = Restaurant.objects.filter( - serves_hot_dogs=True, name__contains="D" - ).update( - name="Demon Puppies", serves_hot_dogs=False - ) - self.assertEqual(rows, 1) - - r1 = Restaurant.objects.get(pk=r.pk) - self.assertFalse(r1.serves_hot_dogs) - self.assertEqual(r1.name, "Demon Puppies") - - # The values() command also works on fields from parent models. - self.assertQuerysetEqual( - ItalianRestaurant.objects.values("name", "rating"), [ - {"rating": 4, "name": "Ristorante Miron"} - ], - lambda o: o - ) - - # select_related works with fields from the parent object as if they - # were a normal part of the model. - old_DEBUG = settings.DEBUG - try: - settings.DEBUG = True - starting_queries = len(connection.queries) - ItalianRestaurant.objects.all()[0].chef - self.assertEqual(len(connection.queries) - starting_queries, 2) - - starting_queries = len(connection.queries) - ItalianRestaurant.objects.select_related("chef")[0].chef - self.assertEqual(len(connection.queries) - starting_queries, 1) - finally: - settings.DEBUG = old_DEBUG - - |