django/tests/proxy_models/tests.py

425 lines
15 KiB
Python

from __future__ import unicode_literals
from django.apps import apps
from django.contrib import admin
from django.contrib.contenttypes.models import ContentType
from django.core import management
from django.core import checks
from django.db import models, DEFAULT_DB_ALIAS
from django.db.models import signals
from django.test import TestCase, override_settings
from .models import (MyPerson, Person, StatusPerson, LowerStatusPerson,
MyPersonProxy, Abstract, OtherPerson, User, UserProxy, UserProxyProxy,
Country, State, StateProxy, TrackerUser, BaseUser, Bug, ProxyTrackerUser,
Improvement, ProxyProxyBug, ProxyBug, ProxyImprovement, Issue)
from .admin import admin as force_admin_model_registration # NOQA
class ProxyModelTests(TestCase):
def test_same_manager_queries(self):
"""
The MyPerson model should be generating the same database queries as
the Person model (when the same manager is used in each case).
"""
my_person_sql = MyPerson.other.all().query.get_compiler(
DEFAULT_DB_ALIAS).as_sql()
person_sql = Person.objects.order_by("name").query.get_compiler(
DEFAULT_DB_ALIAS).as_sql()
self.assertEqual(my_person_sql, person_sql)
def test_inheretance_new_table(self):
"""
The StatusPerson models should have its own table (it's using ORM-level
inheritance).
"""
sp_sql = StatusPerson.objects.all().query.get_compiler(
DEFAULT_DB_ALIAS).as_sql()
p_sql = Person.objects.all().query.get_compiler(
DEFAULT_DB_ALIAS).as_sql()
self.assertNotEqual(sp_sql, p_sql)
def test_basic_proxy(self):
"""
Creating a Person makes them accessible through the MyPerson proxy.
"""
person = Person.objects.create(name="Foo McBar")
self.assertEqual(len(Person.objects.all()), 1)
self.assertEqual(len(MyPerson.objects.all()), 1)
self.assertEqual(MyPerson.objects.get(name="Foo McBar").id, person.id)
self.assertFalse(MyPerson.objects.get(id=person.id).has_special_name())
def test_no_proxy(self):
"""
Person is not proxied by StatusPerson subclass.
"""
Person.objects.create(name="Foo McBar")
self.assertEqual(list(StatusPerson.objects.all()), [])
def test_basic_proxy_reverse(self):
"""
A new MyPerson also shows up as a standard Person.
"""
MyPerson.objects.create(name="Bazza del Frob")
self.assertEqual(len(MyPerson.objects.all()), 1)
self.assertEqual(len(Person.objects.all()), 1)
LowerStatusPerson.objects.create(status="low", name="homer")
lsps = [lsp.name for lsp in LowerStatusPerson.objects.all()]
self.assertEqual(lsps, ["homer"])
def test_correct_type_proxy_of_proxy(self):
"""
Correct type when querying a proxy of proxy
"""
Person.objects.create(name="Foo McBar")
MyPerson.objects.create(name="Bazza del Frob")
LowerStatusPerson.objects.create(status="low", name="homer")
pp = sorted(mpp.name for mpp in MyPersonProxy.objects.all())
self.assertEqual(pp, ['Bazza del Frob', 'Foo McBar', 'homer'])
def test_proxy_included_in_ancestors(self):
"""
Proxy models are included in the ancestors for a model's DoesNotExist
and MultipleObjectsReturned
"""
Person.objects.create(name="Foo McBar")
MyPerson.objects.create(name="Bazza del Frob")
LowerStatusPerson.objects.create(status="low", name="homer")
max_id = Person.objects.aggregate(max_id=models.Max('id'))['max_id']
self.assertRaises(
Person.DoesNotExist,
MyPersonProxy.objects.get,
name='Zathras'
)
self.assertRaises(
Person.MultipleObjectsReturned,
MyPersonProxy.objects.get,
id__lt=max_id + 1
)
self.assertRaises(
Person.DoesNotExist,
StatusPerson.objects.get,
name='Zathras'
)
StatusPerson.objects.create(name='Bazza Jr.')
StatusPerson.objects.create(name='Foo Jr.')
max_id = Person.objects.aggregate(max_id=models.Max('id'))['max_id']
self.assertRaises(
Person.MultipleObjectsReturned,
StatusPerson.objects.get,
id__lt=max_id + 1
)
def test_abc(self):
"""
All base classes must be non-abstract
"""
def build_abc():
class NoAbstract(Abstract):
class Meta:
proxy = True
self.assertRaises(TypeError, build_abc)
def test_no_cbc(self):
"""
The proxy must actually have one concrete base class
"""
def build_no_cbc():
class TooManyBases(Person, Abstract):
class Meta:
proxy = True
self.assertRaises(TypeError, build_no_cbc)
def test_no_base_classes(self):
def build_no_base_classes():
class NoBaseClasses(models.Model):
class Meta:
proxy = True
self.assertRaises(TypeError, build_no_base_classes)
def test_new_fields(self):
class NoNewFields(Person):
newfield = models.BooleanField()
class Meta:
proxy = True
# don't register this model in the app_cache for the current app,
# otherwise the check fails when other tests are being run.
app_label = 'no_such_app'
errors = NoNewFields.check()
expected = [
checks.Error(
"Proxy model 'NoNewFields' contains model fields.",
hint=None,
obj=None,
id='models.E017',
)
]
self.assertEqual(errors, expected)
@override_settings(TEST_SWAPPABLE_MODEL='proxy_models.AlternateModel')
def test_swappable(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['proxy_models'].models.copy()
try:
class SwappableModel(models.Model):
class Meta:
swappable = 'TEST_SWAPPABLE_MODEL'
class AlternateModel(models.Model):
pass
# You can't proxy a swapped model
with self.assertRaises(TypeError):
class ProxyModel(SwappableModel):
class Meta:
proxy = True
finally:
apps.app_configs['proxy_models'].models = _old_models
apps.all_models['proxy_models'] = _old_models
apps.clear_cache()
def test_myperson_manager(self):
Person.objects.create(name="fred")
Person.objects.create(name="wilma")
Person.objects.create(name="barney")
resp = [p.name for p in MyPerson.objects.all()]
self.assertEqual(resp, ['barney', 'fred'])
resp = [p.name for p in MyPerson._default_manager.all()]
self.assertEqual(resp, ['barney', 'fred'])
def test_otherperson_manager(self):
Person.objects.create(name="fred")
Person.objects.create(name="wilma")
Person.objects.create(name="barney")
resp = [p.name for p in OtherPerson.objects.all()]
self.assertEqual(resp, ['barney', 'wilma'])
resp = [p.name for p in OtherPerson.excluder.all()]
self.assertEqual(resp, ['barney', 'fred'])
resp = [p.name for p in OtherPerson._default_manager.all()]
self.assertEqual(resp, ['barney', 'wilma'])
def test_permissions_created(self):
from django.contrib.auth.models import Permission
try:
Permission.objects.get(name="May display users information")
except Permission.DoesNotExist:
self.fail("The permission 'May display users information' has not been created")
def test_proxy_model_signals(self):
"""
Test save signals for proxy models
"""
output = []
def make_handler(model, event):
def _handler(*args, **kwargs):
output.append('%s %s save' % (model, event))
return _handler
h1 = make_handler('MyPerson', 'pre')
h2 = make_handler('MyPerson', 'post')
h3 = make_handler('Person', 'pre')
h4 = make_handler('Person', 'post')
signals.pre_save.connect(h1, sender=MyPerson)
signals.post_save.connect(h2, sender=MyPerson)
signals.pre_save.connect(h3, sender=Person)
signals.post_save.connect(h4, sender=Person)
MyPerson.objects.create(name="dino")
self.assertEqual(output, [
'MyPerson pre save',
'MyPerson post save'
])
output = []
h5 = make_handler('MyPersonProxy', 'pre')
h6 = make_handler('MyPersonProxy', 'post')
signals.pre_save.connect(h5, sender=MyPersonProxy)
signals.post_save.connect(h6, sender=MyPersonProxy)
MyPersonProxy.objects.create(name="pebbles")
self.assertEqual(output, [
'MyPersonProxy pre save',
'MyPersonProxy post save'
])
signals.pre_save.disconnect(h1, sender=MyPerson)
signals.post_save.disconnect(h2, sender=MyPerson)
signals.pre_save.disconnect(h3, sender=Person)
signals.post_save.disconnect(h4, sender=Person)
signals.pre_save.disconnect(h5, sender=MyPersonProxy)
signals.post_save.disconnect(h6, sender=MyPersonProxy)
def test_content_type(self):
ctype = ContentType.objects.get_for_model
self.assertIs(ctype(Person), ctype(OtherPerson))
def test_user_userproxy_userproxyproxy(self):
User.objects.create(name='Bruce')
resp = [u.name for u in User.objects.all()]
self.assertEqual(resp, ['Bruce'])
resp = [u.name for u in UserProxy.objects.all()]
self.assertEqual(resp, ['Bruce'])
resp = [u.name for u in UserProxyProxy.objects.all()]
self.assertEqual(resp, ['Bruce'])
def test_proxy_for_model(self):
self.assertEqual(UserProxy, UserProxyProxy._meta.proxy_for_model)
def test_concrete_model(self):
self.assertEqual(User, UserProxyProxy._meta.concrete_model)
def test_proxy_delete(self):
"""
Proxy objects can be deleted
"""
User.objects.create(name='Bruce')
u2 = UserProxy.objects.create(name='George')
resp = [u.name for u in UserProxy.objects.all()]
self.assertEqual(resp, ['Bruce', 'George'])
u2.delete()
resp = [u.name for u in UserProxy.objects.all()]
self.assertEqual(resp, ['Bruce'])
def test_select_related(self):
"""
We can still use `select_related()` to include related models in our
querysets.
"""
country = Country.objects.create(name='Australia')
State.objects.create(name='New South Wales', country=country)
resp = [s.name for s in State.objects.select_related()]
self.assertEqual(resp, ['New South Wales'])
resp = [s.name for s in StateProxy.objects.select_related()]
self.assertEqual(resp, ['New South Wales'])
self.assertEqual(StateProxy.objects.get(name='New South Wales').name,
'New South Wales')
resp = StateProxy.objects.select_related().get(name='New South Wales')
self.assertEqual(resp.name, 'New South Wales')
def test_proxy_bug(self):
contributor = TrackerUser.objects.create(name='Contributor',
status='contrib')
someone = BaseUser.objects.create(name='Someone')
Bug.objects.create(summary='fix this', version='1.1beta',
assignee=contributor, reporter=someone)
pcontributor = ProxyTrackerUser.objects.create(name='OtherContributor',
status='proxy')
Improvement.objects.create(summary='improve that', version='1.1beta',
assignee=contributor, reporter=pcontributor,
associated_bug=ProxyProxyBug.objects.all()[0])
# Related field filter on proxy
resp = ProxyBug.objects.get(version__icontains='beta')
self.assertEqual(repr(resp), '<ProxyBug: ProxyBug:fix this>')
# Select related + filter on proxy
resp = ProxyBug.objects.select_related().get(version__icontains='beta')
self.assertEqual(repr(resp), '<ProxyBug: ProxyBug:fix this>')
# Proxy of proxy, select_related + filter
resp = ProxyProxyBug.objects.select_related().get(
version__icontains='beta'
)
self.assertEqual(repr(resp), '<ProxyProxyBug: ProxyProxyBug:fix this>')
# Select related + filter on a related proxy field
resp = ProxyImprovement.objects.select_related().get(
reporter__name__icontains='butor'
)
self.assertEqual(
repr(resp),
'<ProxyImprovement: ProxyImprovement:improve that>'
)
# Select related + filter on a related proxy of proxy field
resp = ProxyImprovement.objects.select_related().get(
associated_bug__summary__icontains='fix'
)
self.assertEqual(
repr(resp),
'<ProxyImprovement: ProxyImprovement:improve that>'
)
def test_proxy_load_from_fixture(self):
management.call_command('loaddata', 'mypeople.json', verbosity=0)
p = MyPerson.objects.get(pk=100)
self.assertEqual(p.name, 'Elvis Presley')
def test_eq(self):
self.assertEqual(MyPerson(id=100), Person(id=100))
@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',),
ROOT_URLCONF='proxy_models.urls',)
class ProxyModelAdminTests(TestCase):
fixtures = ['myhorses']
def test_cascade_delete_proxy_model_admin_warning(self):
"""
Test if admin gives warning about cascade deleting models referenced
to concrete model by deleting proxy object.
"""
tracker_user = TrackerUser.objects.all()[0]
base_user = BaseUser.objects.all()[0]
issue = Issue.objects.all()[0]
with self.assertNumQueries(7):
collector = admin.utils.NestedObjects('default')
collector.collect(ProxyTrackerUser.objects.all())
self.assertIn(tracker_user, collector.edges.get(None, ()))
self.assertIn(base_user, collector.edges.get(None, ()))
self.assertIn(issue, collector.edges.get(tracker_user, ()))
def test_delete_str_in_model_admin(self):
"""
Test if the admin delete page shows the correct string representation
for a proxy model.
"""
user = TrackerUser.objects.get(name='Django Pony')
proxy = ProxyTrackerUser.objects.get(name='Django Pony')
user_str = (
'Tracker user: <a href="/admin/proxy_models/trackeruser/%s/">%s</a>' % (user.pk, user))
proxy_str = (
'Proxy tracker user: <a href="/admin/proxy_models/proxytrackeruser/%s/">%s</a>' %
(proxy.pk, proxy))
self.client.login(username='super', password='secret')
response = self.client.get('/admin/proxy_models/trackeruser/%s/delete/' % (user.pk,))
delete_str = response.context['deleted_objects'][0]
self.assertEqual(delete_str, user_str)
response = self.client.get('/admin/proxy_models/proxytrackeruser/%s/delete/' % (proxy.pk,))
delete_str = response.context['deleted_objects'][0]
self.assertEqual(delete_str, proxy_str)
self.client.logout()