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from __future__ import unicode_literals
from django.apps import apps
from django.db import models
from django.template import Context, Template
from django.test import TestCase, override_settings
from django.utils.encoding import force_text
from .models import (
AbstractBase1, AbstractBase2, AbstractBase3, Child1, Child2, Child3,
Child4, Child5, Child6, Child7, RelatedModel, RelationModel,
)
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")
@override_settings(TEST_SWAPPABLE_MODEL='managers_regress.Parent')
def test_swappable_manager(self):
# The models need to be removed after the test in order to prevent bad
# interactions with the flush operation in other tests.
_old_models = apps.app_configs['managers_regress'].models.copy()
try:
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:
apps.app_configs['managers_regress'].models = _old_models
apps.all_models['managers_regress'] = _old_models
apps.clear_cache()
@override_settings(TEST_SWAPPABLE_MODEL='managers_regress.Parent')
def test_custom_swappable_manager(self):
# The models need to be removed after the test in order to prevent bad
# interactions with the flush operation in other tests.
_old_models = apps.app_configs['managers_regress'].models.copy()
try:
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:
apps.app_configs['managers_regress'].models = _old_models
apps.all_models['managers_regress'] = _old_models
apps.clear_cache()
@override_settings(TEST_SWAPPABLE_MODEL='managers_regress.Parent')
def test_explicit_swappable_manager(self):
# The models need to be removed after the test in order to prevent bad
# interactions with the flush operation in other tests.
_old_models = apps.app_configs['managers_regress'].models.copy()
try:
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:
apps.app_configs['managers_regress'].models = _old_models
apps.all_models['managers_regress'] = _old_models
apps.clear_cache()
def test_regress_3871(self):
related = RelatedModel.objects.create()
relation = RelationModel()
relation.fk = related
relation.gfk = related
relation.save()
relation.m2m.add(related)
t = Template('{{ related.test_fk.all.0 }}{{ related.test_gfk.all.0 }}{{ related.test_m2m.all.0 }}')
self.assertEqual(
t.render(Context({'related': related})),
''.join([force_text(relation.pk)] * 3),
)
def test_field_can_be_called_exact(self):
# Make sure related managers core filters don't include an
# explicit `__exact` lookup that could be interpreted as a
# reference to a foreign `exact` field. refs #23940.
related = RelatedModel.objects.create(exact=False)
relation = related.test_fk.create()
self.assertEqual(related.test_fk.get(), relation)
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