from __future__ import unicode_literals from django.test import TestCase from django.utils import six from .models import Person, FunPerson, Book, Car, PersonManager, PublishedBookManager class CustomManagerTests(TestCase): def setUp(self): self.b1 = Book.published_objects.create( title="How to program", author="Rodney Dangerfield", is_published=True) self.b2 = Book.published_objects.create( title="How to be smart", author="Albert Einstein", is_published=False) def test_manager(self): Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True) droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False) # Test a custom `Manager` method. self.assertQuerysetEqual( Person.objects.get_fun_people(), [ "Bugs Bunny" ], six.text_type ) # Test that the methods of a custom `QuerySet` are properly # copied onto the default `Manager`. for manager in ['custom_queryset_default_manager', 'custom_queryset_custom_manager']: manager = getattr(Person, manager) # Copy public methods. manager.public_method() # Don't copy private methods. with self.assertRaises(AttributeError): manager._private_method() # Copy methods with `manager=True` even if they are private. manager._optin_private_method() # Don't copy methods with `manager=False` even if they are public. with self.assertRaises(AttributeError): manager.optout_public_method() # Test that the overridden method is called. queryset = manager.filter() self.assertQuerysetEqual(queryset, ["Bugs Bunny"], six.text_type) self.assertEqual(queryset._filter_CustomQuerySet, True) # Test that specialized querysets inherit from our custom queryset. queryset = manager.values_list('first_name', flat=True).filter() self.assertEqual(list(queryset), [six.text_type("Bugs")]) self.assertEqual(queryset._filter_CustomQuerySet, True) # Test that the custom manager `__init__()` argument has been set. self.assertEqual(Person.custom_queryset_custom_manager.init_arg, 'hello') # Test that the custom manager method is only available on the manager. Person.custom_queryset_custom_manager.manager_only() with self.assertRaises(AttributeError): Person.custom_queryset_custom_manager.all().manager_only() # Test that the queryset method doesn't override the custom manager method. queryset = Person.custom_queryset_custom_manager.filter() self.assertQuerysetEqual(queryset, ["Bugs Bunny"], six.text_type) self.assertEqual(queryset._filter_CustomManager, True) # The RelatedManager used on the 'books' descriptor extends the default # manager self.assertIsInstance(droopy.books, PublishedBookManager) # The default manager, "objects", doesn't exist, because a custom one # was provided. self.assertRaises(AttributeError, lambda: Book.objects) # The RelatedManager used on the 'authors' descriptor extends the # default manager self.assertIsInstance(self.b2.authors, PersonManager) self.assertQuerysetEqual( Book.published_objects.all(), [ "How to program", ], lambda b: b.title ) Car.cars.create(name="Corvette", mileage=21, top_speed=180) Car.cars.create(name="Neon", mileage=31, top_speed=100) self.assertQuerysetEqual( Car.cars.order_by("name"), [ "Corvette", "Neon", ], lambda c: c.name ) self.assertQuerysetEqual( Car.fast_cars.all(), [ "Corvette", ], lambda c: c.name ) # Each model class gets a "_default_manager" attribute, which is a # reference to the first manager defined in the class. In this case, # it's "cars". self.assertQuerysetEqual( Car._default_manager.order_by("name"), [ "Corvette", "Neon", ], lambda c: c.name ) def test_fk_related_manager(self): Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1) Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1) FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1) FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1) self.assertQuerysetEqual( self.b1.favorite_books.order_by('first_name').all(), [ "Bugs", "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.fun_people_favorite_books.all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_books(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_books(manager='fun_people').all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) def test_gfk_related_manager(self): Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1) Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1) FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1) FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1) self.assertQuerysetEqual( self.b1.favorite_things.all(), [ "Bugs", "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.fun_people_favorite_things.all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_things(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_things(manager='fun_people').all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) def test_m2m_related_manager(self): bugs = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True) self.b1.authors.add(bugs) droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False) self.b1.authors.add(droopy) bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True) self.b1.fun_authors.add(bugs) droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False) self.b1.fun_authors.add(droopy) self.assertQuerysetEqual( self.b1.authors.order_by('first_name').all(), [ "Bugs", "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.fun_authors.order_by('first_name').all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.authors(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.authors(manager='fun_people').all(), [ "Bugs", ], lambda c: c.first_name, ordered=False, ) def test_removal_through_default_fk_related_manager(self): bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1) droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1) self.b1.fun_people_favorite_books.remove(droopy) self.assertQuerysetEqual( FunPerson._base_manager.filter(favorite_book=self.b1), [ "Bugs", "Droopy", ], lambda c: c.first_name, ordered=False, ) self.b1.fun_people_favorite_books.remove(bugs) self.assertQuerysetEqual( FunPerson._base_manager.filter(favorite_book=self.b1), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) bugs.favorite_book = self.b1 bugs.save() self.b1.fun_people_favorite_books.clear() self.assertQuerysetEqual( FunPerson._base_manager.filter(favorite_book=self.b1), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) def test_removal_through_specified_fk_related_manager(self): Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1) droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1) # Check that the fun manager DOESN'T remove boring people. self.b1.favorite_books(manager='fun_people').remove(droopy) self.assertQuerysetEqual( self.b1.favorite_books(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) # Check that the boring manager DOES remove boring people. self.b1.favorite_books(manager='boring_people').remove(droopy) self.assertQuerysetEqual( self.b1.favorite_books(manager='boring_people').all(), [ ], lambda c: c.first_name, ordered=False, ) droopy.favorite_book = self.b1 droopy.save() # Check that the fun manager ONLY clears fun people. self.b1.favorite_books(manager='fun_people').clear() self.assertQuerysetEqual( self.b1.favorite_books(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_books(manager='fun_people').all(), [ ], lambda c: c.first_name, ordered=False, ) def test_removal_through_default_gfk_related_manager(self): bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1) droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1) self.b1.fun_people_favorite_things.remove(droopy) self.assertQuerysetEqual( FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [ "Bugs", "Droopy", ], lambda c: c.first_name, ordered=False, ) self.b1.fun_people_favorite_things.remove(bugs) self.assertQuerysetEqual( FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) bugs.favorite_book = self.b1 bugs.save() self.b1.fun_people_favorite_things.clear() self.assertQuerysetEqual( FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) def test_removal_through_specified_gfk_related_manager(self): Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1) droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1) # Check that the fun manager DOESN'T remove boring people. self.b1.favorite_things(manager='fun_people').remove(droopy) self.assertQuerysetEqual( self.b1.favorite_things(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) # Check that the boring manager DOES remove boring people. self.b1.favorite_things(manager='boring_people').remove(droopy) self.assertQuerysetEqual( self.b1.favorite_things(manager='boring_people').all(), [ ], lambda c: c.first_name, ordered=False, ) droopy.favorite_thing = self.b1 droopy.save() # Check that the fun manager ONLY clears fun people. self.b1.favorite_things(manager='fun_people').clear() self.assertQuerysetEqual( self.b1.favorite_things(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.favorite_things(manager='fun_people').all(), [ ], lambda c: c.first_name, ordered=False, ) def test_removal_through_default_m2m_related_manager(self): bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True) self.b1.fun_authors.add(bugs) droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False) self.b1.fun_authors.add(droopy) self.b1.fun_authors.remove(droopy) self.assertQuerysetEqual( self.b1.fun_authors.through._default_manager.all(), [ "Bugs", "Droopy", ], lambda c: c.funperson.first_name, ordered=False, ) self.b1.fun_authors.remove(bugs) self.assertQuerysetEqual( self.b1.fun_authors.through._default_manager.all(), [ "Droopy", ], lambda c: c.funperson.first_name, ordered=False, ) self.b1.fun_authors.add(bugs) self.b1.fun_authors.clear() self.assertQuerysetEqual( self.b1.fun_authors.through._default_manager.all(), [ "Droopy", ], lambda c: c.funperson.first_name, ordered=False, ) def test_removal_through_specified_m2m_related_manager(self): bugs = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True) self.b1.authors.add(bugs) droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False) self.b1.authors.add(droopy) # Check that the fun manager DOESN'T remove boring people. self.b1.authors(manager='fun_people').remove(droopy) self.assertQuerysetEqual( self.b1.authors(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) # Check that the boring manager DOES remove boring people. self.b1.authors(manager='boring_people').remove(droopy) self.assertQuerysetEqual( self.b1.authors(manager='boring_people').all(), [ ], lambda c: c.first_name, ordered=False, ) self.b1.authors.add(droopy) # Check that the fun manager ONLY clears fun people. self.b1.authors(manager='fun_people').clear() self.assertQuerysetEqual( self.b1.authors(manager='boring_people').all(), [ "Droopy", ], lambda c: c.first_name, ordered=False, ) self.assertQuerysetEqual( self.b1.authors(manager='fun_people').all(), [ ], lambda c: c.first_name, ordered=False, )