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from __future__ import absolute_import
import copy
from django.conf import settings
from django.db import models
from django.db.models.loading import cache
from django.test import TestCase
from django.test.utils import override_settings
from .models import (
Child1,
Child2,
Child3,
Child4,
Child5,
Child6,
Child7,
AbstractBase1,
AbstractBase2,
AbstractBase3,
)
class ManagersRegressionTests(TestCase):
def test_managers(self):
Child1.objects.create(name='fred', data='a1')
Child1.objects.create(name='barney', data='a2')
Child2.objects.create(name='fred', data='b1', value=1)
Child2.objects.create(name='barney', data='b2', value=42)
Child3.objects.create(name='fred', data='c1', comment='yes')
Child3.objects.create(name='barney', data='c2', comment='no')
Child4.objects.create(name='fred', data='d1')
Child4.objects.create(name='barney', data='d2')
Child5.objects.create(name='fred', comment='yes')
Child5.objects.create(name='barney', comment='no')
Child6.objects.create(name='fred', data='f1', value=42)
Child6.objects.create(name='barney', data='f2', value=42)
Child7.objects.create(name='fred')
Child7.objects.create(name='barney')
self.assertQuerysetEqual(Child1.manager1.all(), ["<Child1: a1>"])
self.assertQuerysetEqual(Child1.manager2.all(), ["<Child1: a2>"])
self.assertQuerysetEqual(Child1._default_manager.all(), ["<Child1: a1>"])
self.assertQuerysetEqual(Child2._default_manager.all(), ["<Child2: b1>"])
self.assertQuerysetEqual(Child2.restricted.all(), ["<Child2: b2>"])
self.assertQuerysetEqual(Child3._default_manager.all(), ["<Child3: c1>"])
self.assertQuerysetEqual(Child3.manager1.all(), ["<Child3: c1>"])
self.assertQuerysetEqual(Child3.manager2.all(), ["<Child3: c2>"])
# Since Child6 inherits from Child4, the corresponding rows from f1 and
# f2 also appear here. This is the expected result.
self.assertQuerysetEqual(Child4._default_manager.order_by('data'), [
"<Child4: d1>",
"<Child4: d2>",
"<Child4: f1>",
"<Child4: f2>"
]
)
self.assertQuerysetEqual(Child4.manager1.all(), [
"<Child4: d1>",
"<Child4: f1>"
],
ordered=False
)
self.assertQuerysetEqual(Child5._default_manager.all(), ["<Child5: fred>"])
self.assertQuerysetEqual(Child6._default_manager.all(), ["<Child6: f1>"])
self.assertQuerysetEqual(Child7._default_manager.order_by('name'), [
"<Child7: barney>",
"<Child7: fred>"
]
)
def test_abstract_manager(self):
# Accessing the manager on an abstract model should
# raise an attribute error with an appropriate message.
try:
AbstractBase3.objects.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
# This error message isn't ideal, but if the model is abstract and
# a lot of the class instantiation logic isn't invoked; if the
# manager is implied, then we don't get a hook to install the
# error-raising manager.
self.assertEqual(str(e), "type object 'AbstractBase3' has no attribute 'objects'")
def test_custom_abstract_manager(self):
# Accessing the manager on an abstract model with an custom
# manager should raise an attribute error with an appropriate
# message.
try:
AbstractBase2.restricted.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
self.assertEqual(str(e), "Manager isn't available; AbstractBase2 is abstract")
def test_explicit_abstract_manager(self):
# Accessing the manager on an abstract model with an explicit
# manager should raise an attribute error with an appropriate
# message.
try:
AbstractBase1.objects.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
self.assertEqual(str(e), "Manager isn't available; AbstractBase1 is abstract")
def test_swappable_manager(self):
try:
# This test adds dummy models to the app cache. These
# need to be removed in order to prevent bad interactions
# with the flush operation in other tests.
old_app_models = copy.deepcopy(cache.app_models)
old_app_store = copy.deepcopy(cache.app_store)
settings.TEST_SWAPPABLE_MODEL = 'managers_regress.Parent'
class SwappableModel(models.Model):
class Meta:
swappable = 'TEST_SWAPPABLE_MODEL'
# Accessing the manager on a swappable model should
# raise an attribute error with a helpful message
try:
SwappableModel.objects.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
self.assertEqual(str(e), "Manager isn't available; SwappableModel has been swapped for 'managers_regress.Parent'")
finally:
del settings.TEST_SWAPPABLE_MODEL
cache.app_models = old_app_models
cache.app_store = old_app_store
def test_custom_swappable_manager(self):
try:
# This test adds dummy models to the app cache. These
# need to be removed in order to prevent bad interactions
# with the flush operation in other tests.
old_app_models = copy.deepcopy(cache.app_models)
old_app_store = copy.deepcopy(cache.app_store)
settings.TEST_SWAPPABLE_MODEL = 'managers_regress.Parent'
class SwappableModel(models.Model):
stuff = models.Manager()
class Meta:
swappable = 'TEST_SWAPPABLE_MODEL'
# Accessing the manager on a swappable model with an
# explicit manager should raise an attribute error with a
# helpful message
try:
SwappableModel.stuff.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
self.assertEqual(str(e), "Manager isn't available; SwappableModel has been swapped for 'managers_regress.Parent'")
finally:
del settings.TEST_SWAPPABLE_MODEL
cache.app_models = old_app_models
cache.app_store = old_app_store
def test_explicit_swappable_manager(self):
try:
# This test adds dummy models to the app cache. These
# need to be removed in order to prevent bad interactions
# with the flush operation in other tests.
old_app_models = copy.deepcopy(cache.app_models)
old_app_store = copy.deepcopy(cache.app_store)
settings.TEST_SWAPPABLE_MODEL = 'managers_regress.Parent'
class SwappableModel(models.Model):
objects = models.Manager()
class Meta:
swappable = 'TEST_SWAPPABLE_MODEL'
# Accessing the manager on a swappable model with an
# explicit manager should raise an attribute error with a
# helpful message
try:
SwappableModel.objects.all()
self.fail('Should raise an AttributeError')
except AttributeError as e:
self.assertEqual(str(e), "Manager isn't available; SwappableModel has been swapped for 'managers_regress.Parent'")
finally:
del settings.TEST_SWAPPABLE_MODEL
cache.app_models = old_app_models
cache.app_store = old_app_store
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