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672 lines
25 KiB
Python
672 lines
25 KiB
Python
from django.db import models
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from django.test import TestCase
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from .models import (
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Book, Car, CustomManager, CustomQuerySet, DeconstructibleCustomManager,
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FastCarAsBase, FastCarAsDefault, FunPerson, OneToOneRestrictedModel,
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Person, PersonFromAbstract, PersonManager, PublishedBookManager,
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RelatedModel, RestrictedModel,
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)
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class CustomManagerTests(TestCase):
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custom_manager_names = [
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'custom_queryset_default_manager',
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'custom_queryset_custom_manager',
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]
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@classmethod
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def setUpTestData(cls):
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cls.b1 = Book.published_objects.create(
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title="How to program", author="Rodney Dangerfield", is_published=True)
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cls.b2 = Book.published_objects.create(
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title="How to be smart", author="Albert Einstein", is_published=False)
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cls.p1 = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
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cls.droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False)
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def test_custom_manager_basic(self):
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"""
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Test a custom Manager method.
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"""
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self.assertQuerysetEqual(
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Person.objects.get_fun_people(), [
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"Bugs Bunny"
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],
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str
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)
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def test_queryset_copied_to_default(self):
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"""
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The methods of a custom QuerySet are properly copied onto the
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default Manager.
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"""
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for manager_name in self.custom_manager_names:
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with self.subTest(manager_name=manager_name):
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manager = getattr(Person, manager_name)
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# Public methods are copied
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manager.public_method()
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# Private methods are not copied
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with self.assertRaises(AttributeError):
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manager._private_method()
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def test_manager_honors_queryset_only(self):
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for manager_name in self.custom_manager_names:
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with self.subTest(manager_name=manager_name):
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manager = getattr(Person, manager_name)
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# Methods with queryset_only=False are copied even if they are private.
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manager._optin_private_method()
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# Methods with queryset_only=True aren't copied even if they are public.
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msg = "%r object has no attribute 'optout_public_method'" % manager.__class__.__name__
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with self.assertRaisesMessage(AttributeError, msg):
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manager.optout_public_method()
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def test_manager_use_queryset_methods(self):
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"""
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Custom manager will use the queryset methods
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"""
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for manager_name in self.custom_manager_names:
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with self.subTest(manager_name=manager_name):
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manager = getattr(Person, manager_name)
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queryset = manager.filter()
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self.assertQuerysetEqual(queryset, ["Bugs Bunny"], str)
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self.assertIs(queryset._filter_CustomQuerySet, True)
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# Specialized querysets inherit from our custom queryset.
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queryset = manager.values_list('first_name', flat=True).filter()
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self.assertEqual(list(queryset), ["Bugs"])
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self.assertIs(queryset._filter_CustomQuerySet, True)
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self.assertIsInstance(queryset.values(), CustomQuerySet)
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self.assertIsInstance(queryset.values().values(), CustomQuerySet)
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self.assertIsInstance(queryset.values_list().values(), CustomQuerySet)
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def test_init_args(self):
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"""
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The custom manager __init__() argument has been set.
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"""
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self.assertEqual(Person.custom_queryset_custom_manager.init_arg, 'hello')
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def test_manager_attributes(self):
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"""
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Custom manager method is only available on the manager and not on
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querysets.
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"""
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Person.custom_queryset_custom_manager.manager_only()
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msg = "'CustomQuerySet' object has no attribute 'manager_only'"
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with self.assertRaisesMessage(AttributeError, msg):
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Person.custom_queryset_custom_manager.all().manager_only()
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def test_queryset_and_manager(self):
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"""
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Queryset method doesn't override the custom manager method.
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"""
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queryset = Person.custom_queryset_custom_manager.filter()
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self.assertQuerysetEqual(queryset, ["Bugs Bunny"], str)
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self.assertIs(queryset._filter_CustomManager, True)
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def test_related_manager(self):
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"""
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The related managers extend the default manager.
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"""
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self.assertIsInstance(self.droopy.books, PublishedBookManager)
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self.assertIsInstance(self.b2.authors, PersonManager)
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def test_no_objects(self):
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"""
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The default manager, "objects", doesn't exist, because a custom one
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was provided.
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"""
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msg = "type object 'Book' has no attribute 'objects'"
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with self.assertRaisesMessage(AttributeError, msg):
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Book.objects
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def test_filtering(self):
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"""
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Custom managers respond to usual filtering methods
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"""
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self.assertQuerysetEqual(
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Book.published_objects.all(), [
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"How to program",
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],
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lambda b: b.title
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)
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def test_fk_related_manager(self):
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Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1)
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Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1)
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FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1)
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FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1)
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self.assertQuerysetEqual(
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self.b1.favorite_books.order_by('first_name').all(), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.fun_people_favorite_books.all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='fun_people').all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_gfk_related_manager(self):
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Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1)
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Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1)
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FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1)
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FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1)
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self.assertQuerysetEqual(
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self.b1.favorite_things.all(), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.fun_people_favorite_things.all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='fun_people').all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_m2m_related_manager(self):
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bugs = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
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self.b1.authors.add(bugs)
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droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False)
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self.b1.authors.add(droopy)
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bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
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self.b1.fun_authors.add(bugs)
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droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False)
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self.b1.fun_authors.add(droopy)
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self.assertQuerysetEqual(
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self.b1.authors.order_by('first_name').all(), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.fun_authors.order_by('first_name').all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.authors(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.authors(manager='fun_people').all(), [
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"Bugs",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_removal_through_default_fk_related_manager(self, bulk=True):
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bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1)
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droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1)
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self.b1.fun_people_favorite_books.remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.filter(favorite_book=self.b1), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.b1.fun_people_favorite_books.remove(bugs, bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.filter(favorite_book=self.b1), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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bugs.favorite_book = self.b1
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bugs.save()
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self.b1.fun_people_favorite_books.clear(bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.filter(favorite_book=self.b1), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_slow_removal_through_default_fk_related_manager(self):
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self.test_removal_through_default_fk_related_manager(bulk=False)
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def test_removal_through_specified_fk_related_manager(self, bulk=True):
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Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_book=self.b1)
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droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_book=self.b1)
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# The fun manager DOESN'T remove boring people.
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self.b1.favorite_books(manager='fun_people').remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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# The boring manager DOES remove boring people.
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self.b1.favorite_books(manager='boring_people').remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='boring_people').all(), [
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],
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lambda c: c.first_name,
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ordered=False,
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)
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droopy.favorite_book = self.b1
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droopy.save()
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# The fun manager ONLY clears fun people.
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self.b1.favorite_books(manager='fun_people').clear(bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_books(manager='fun_people').all(), [
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_slow_removal_through_specified_fk_related_manager(self):
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self.test_removal_through_specified_fk_related_manager(bulk=False)
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def test_removal_through_default_gfk_related_manager(self, bulk=True):
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bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1)
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droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1)
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self.b1.fun_people_favorite_things.remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.b1.fun_people_favorite_things.remove(bugs, bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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bugs.favorite_book = self.b1
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bugs.save()
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self.b1.fun_people_favorite_things.clear(bulk=bulk)
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self.assertQuerysetEqual(
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FunPerson._base_manager.order_by('first_name').filter(favorite_thing_id=self.b1.pk), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_slow_removal_through_default_gfk_related_manager(self):
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self.test_removal_through_default_gfk_related_manager(bulk=False)
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def test_removal_through_specified_gfk_related_manager(self, bulk=True):
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Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True, favorite_thing=self.b1)
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droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False, favorite_thing=self.b1)
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# The fun manager DOESN'T remove boring people.
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self.b1.favorite_things(manager='fun_people').remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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# The boring manager DOES remove boring people.
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self.b1.favorite_things(manager='boring_people').remove(droopy, bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='boring_people').all(), [
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],
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lambda c: c.first_name,
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ordered=False,
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)
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droopy.favorite_thing = self.b1
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droopy.save()
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# The fun manager ONLY clears fun people.
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self.b1.favorite_things(manager='fun_people').clear(bulk=bulk)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.assertQuerysetEqual(
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self.b1.favorite_things(manager='fun_people').all(), [
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],
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lambda c: c.first_name,
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ordered=False,
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)
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def test_slow_removal_through_specified_gfk_related_manager(self):
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self.test_removal_through_specified_gfk_related_manager(bulk=False)
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def test_removal_through_default_m2m_related_manager(self):
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bugs = FunPerson.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
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self.b1.fun_authors.add(bugs)
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droopy = FunPerson.objects.create(first_name="Droopy", last_name="Dog", fun=False)
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self.b1.fun_authors.add(droopy)
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self.b1.fun_authors.remove(droopy)
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self.assertQuerysetEqual(
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self.b1.fun_authors.through._default_manager.all(), [
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"Bugs",
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"Droopy",
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],
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lambda c: c.funperson.first_name,
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ordered=False,
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)
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self.b1.fun_authors.remove(bugs)
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self.assertQuerysetEqual(
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self.b1.fun_authors.through._default_manager.all(), [
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"Droopy",
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],
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lambda c: c.funperson.first_name,
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ordered=False,
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)
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self.b1.fun_authors.add(bugs)
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self.b1.fun_authors.clear()
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self.assertQuerysetEqual(
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self.b1.fun_authors.through._default_manager.all(), [
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"Droopy",
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],
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lambda c: c.funperson.first_name,
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ordered=False,
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)
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def test_removal_through_specified_m2m_related_manager(self):
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bugs = Person.objects.create(first_name="Bugs", last_name="Bunny", fun=True)
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self.b1.authors.add(bugs)
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droopy = Person.objects.create(first_name="Droopy", last_name="Dog", fun=False)
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self.b1.authors.add(droopy)
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# The fun manager DOESN'T remove boring people.
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self.b1.authors(manager='fun_people').remove(droopy)
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self.assertQuerysetEqual(
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self.b1.authors(manager='boring_people').all(), [
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"Droopy",
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],
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lambda c: c.first_name,
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ordered=False,
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)
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# The boring manager DOES remove boring people.
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self.b1.authors(manager='boring_people').remove(droopy)
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self.assertQuerysetEqual(
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self.b1.authors(manager='boring_people').all(), [
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],
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lambda c: c.first_name,
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ordered=False,
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)
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self.b1.authors.add(droopy)
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# The fun manager ONLY clears fun people.
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self.b1.authors(manager='fun_people').clear()
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self.assertQuerysetEqual(
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self.b1.authors(manager='boring_people').all(), [
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"Droopy",
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],
|
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lambda c: c.first_name,
|
|
ordered=False,
|
|
)
|
|
self.assertQuerysetEqual(
|
|
self.b1.authors(manager='fun_people').all(), [
|
|
],
|
|
lambda c: c.first_name,
|
|
ordered=False,
|
|
)
|
|
|
|
def test_deconstruct_default(self):
|
|
mgr = models.Manager()
|
|
as_manager, mgr_path, qs_path, args, kwargs = mgr.deconstruct()
|
|
self.assertFalse(as_manager)
|
|
self.assertEqual(mgr_path, 'django.db.models.manager.Manager')
|
|
self.assertEqual(args, ())
|
|
self.assertEqual(kwargs, {})
|
|
|
|
def test_deconstruct_as_manager(self):
|
|
mgr = CustomQuerySet.as_manager()
|
|
as_manager, mgr_path, qs_path, args, kwargs = mgr.deconstruct()
|
|
self.assertTrue(as_manager)
|
|
self.assertEqual(qs_path, 'custom_managers.models.CustomQuerySet')
|
|
|
|
def test_deconstruct_from_queryset(self):
|
|
mgr = DeconstructibleCustomManager('a', 'b')
|
|
as_manager, mgr_path, qs_path, args, kwargs = mgr.deconstruct()
|
|
self.assertFalse(as_manager)
|
|
self.assertEqual(mgr_path, 'custom_managers.models.DeconstructibleCustomManager')
|
|
self.assertEqual(args, ('a', 'b',))
|
|
self.assertEqual(kwargs, {})
|
|
|
|
mgr = DeconstructibleCustomManager('x', 'y', c=3, d=4)
|
|
as_manager, mgr_path, qs_path, args, kwargs = mgr.deconstruct()
|
|
self.assertFalse(as_manager)
|
|
self.assertEqual(mgr_path, 'custom_managers.models.DeconstructibleCustomManager')
|
|
self.assertEqual(args, ('x', 'y',))
|
|
self.assertEqual(kwargs, {'c': 3, 'd': 4})
|
|
|
|
def test_deconstruct_from_queryset_failing(self):
|
|
mgr = CustomManager('arg')
|
|
msg = ("Could not find manager BaseCustomManagerFromCustomQuerySet in "
|
|
"django.db.models.manager.\n"
|
|
"Please note that you need to inherit from managers you "
|
|
"dynamically generated with 'from_queryset()'.")
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
mgr.deconstruct()
|
|
|
|
def test_abstract_model_with_custom_manager_name(self):
|
|
"""
|
|
A custom manager may be defined on an abstract model.
|
|
It will be inherited by the abstract model's children.
|
|
"""
|
|
PersonFromAbstract.abstract_persons.create(objects='Test')
|
|
self.assertQuerysetEqual(
|
|
PersonFromAbstract.abstract_persons.all(), ["Test"],
|
|
lambda c: c.objects,
|
|
)
|
|
|
|
|
|
class TestCars(TestCase):
|
|
|
|
def test_managers(self):
|
|
# Each model class gets a "_default_manager" attribute, which is a
|
|
# reference to the first manager defined in the class.
|
|
Car.cars.create(name="Corvette", mileage=21, top_speed=180)
|
|
Car.cars.create(name="Neon", mileage=31, top_speed=100)
|
|
|
|
self.assertQuerysetEqual(
|
|
Car._default_manager.order_by("name"), [
|
|
"Corvette",
|
|
"Neon",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
self.assertQuerysetEqual(
|
|
Car.cars.order_by("name"), [
|
|
"Corvette",
|
|
"Neon",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
# alternate manager
|
|
self.assertQuerysetEqual(
|
|
Car.fast_cars.all(), [
|
|
"Corvette",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
# explicit default manager
|
|
self.assertQuerysetEqual(
|
|
FastCarAsDefault.cars.order_by("name"), [
|
|
"Corvette",
|
|
"Neon",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
self.assertQuerysetEqual(
|
|
FastCarAsDefault._default_manager.all(), [
|
|
"Corvette",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
# explicit base manager
|
|
self.assertQuerysetEqual(
|
|
FastCarAsBase.cars.order_by("name"), [
|
|
"Corvette",
|
|
"Neon",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
self.assertQuerysetEqual(
|
|
FastCarAsBase._base_manager.all(), [
|
|
"Corvette",
|
|
],
|
|
lambda c: c.name
|
|
)
|
|
|
|
|
|
class CustomManagersRegressTestCase(TestCase):
|
|
def test_filtered_default_manager(self):
|
|
"""Even though the default manager filters out some records,
|
|
we must still be able to save (particularly, save by updating
|
|
existing records) those filtered instances. This is a
|
|
regression test for #8990, #9527"""
|
|
related = RelatedModel.objects.create(name="xyzzy")
|
|
obj = RestrictedModel.objects.create(name="hidden", related=related)
|
|
obj.name = "still hidden"
|
|
obj.save()
|
|
|
|
# If the hidden object wasn't seen during the save process,
|
|
# there would now be two objects in the database.
|
|
self.assertEqual(RestrictedModel.plain_manager.count(), 1)
|
|
|
|
def test_refresh_from_db_when_default_manager_filters(self):
|
|
"""
|
|
Model.refresh_from_db() works for instances hidden by the default
|
|
manager.
|
|
"""
|
|
book = Book._base_manager.create(is_published=False)
|
|
Book._base_manager.filter(pk=book.pk).update(title='Hi')
|
|
book.refresh_from_db()
|
|
self.assertEqual(book.title, 'Hi')
|
|
|
|
def test_save_clears_annotations_from_base_manager(self):
|
|
"""Model.save() clears annotations from the base manager."""
|
|
self.assertEqual(Book._meta.base_manager.name, 'annotated_objects')
|
|
book = Book.annotated_objects.create(title='Hunting')
|
|
Person.objects.create(
|
|
first_name='Bugs', last_name='Bunny', fun=True,
|
|
favorite_book=book, favorite_thing_id=1,
|
|
)
|
|
book = Book.annotated_objects.first()
|
|
self.assertEqual(book.favorite_avg, 1) # Annotation from the manager.
|
|
book.title = 'New Hunting'
|
|
# save() fails if annotations that involve related fields aren't
|
|
# cleared before the update query.
|
|
book.save()
|
|
self.assertEqual(Book.annotated_objects.first().title, 'New Hunting')
|
|
|
|
def test_delete_related_on_filtered_manager(self):
|
|
"""Deleting related objects should also not be distracted by a
|
|
restricted manager on the related object. This is a regression
|
|
test for #2698."""
|
|
related = RelatedModel.objects.create(name="xyzzy")
|
|
|
|
for name, public in (('one', True), ('two', False), ('three', False)):
|
|
RestrictedModel.objects.create(name=name, is_public=public, related=related)
|
|
|
|
obj = RelatedModel.objects.get(name="xyzzy")
|
|
obj.delete()
|
|
|
|
# All of the RestrictedModel instances should have been
|
|
# deleted, since they *all* pointed to the RelatedModel. If
|
|
# the default manager is used, only the public one will be
|
|
# deleted.
|
|
self.assertEqual(len(RestrictedModel.plain_manager.all()), 0)
|
|
|
|
def test_delete_one_to_one_manager(self):
|
|
# The same test case as the last one, but for one-to-one
|
|
# models, which are implemented slightly different internally,
|
|
# so it's a different code path.
|
|
obj = RelatedModel.objects.create(name="xyzzy")
|
|
OneToOneRestrictedModel.objects.create(name="foo", is_public=False, related=obj)
|
|
obj = RelatedModel.objects.get(name="xyzzy")
|
|
obj.delete()
|
|
self.assertEqual(len(OneToOneRestrictedModel.plain_manager.all()), 0)
|
|
|
|
def test_queryset_with_custom_init(self):
|
|
"""
|
|
BaseManager.get_queryset() should use kwargs rather than args to allow
|
|
custom kwargs (#24911).
|
|
"""
|
|
qs_custom = Person.custom_init_queryset_manager.all()
|
|
qs_default = Person.objects.all()
|
|
self.assertQuerysetEqual(qs_custom, qs_default)
|