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from __future__ import unicode_literals
import warnings
from django.contrib.contenttypes.models import ContentType, ContentTypeManager
from django.contrib.contenttypes.views import shortcut
from django.contrib.sites.shortcuts import get_current_site
from django.db.utils import IntegrityError, OperationalError, ProgrammingError
from django.http import Http404, HttpRequest
from django.test import TestCase, mock, override_settings
from django.utils import six
from .models import (
ConcreteModel, FooWithBrokenAbsoluteUrl, FooWithoutUrl, FooWithUrl,
ProxyModel,
)
class ContentTypesTests(TestCase):
def setUp(self):
ContentType.objects.clear_cache()
def tearDown(self):
ContentType.objects.clear_cache()
def test_lookup_cache(self):
"""
Make sure that the content type cache (see ContentTypeManager)
works correctly. Lookups for a particular content type -- by model, ID
or natural key -- should hit the database only on the first lookup.
"""
# At this point, a lookup for a ContentType should hit the DB
with self.assertNumQueries(1):
ContentType.objects.get_for_model(ContentType)
# A second hit, though, won't hit the DB, nor will a lookup by ID
# or natural key
with self.assertNumQueries(0):
ct = ContentType.objects.get_for_model(ContentType)
with self.assertNumQueries(0):
ContentType.objects.get_for_id(ct.id)
with self.assertNumQueries(0):
ContentType.objects.get_by_natural_key('contenttypes',
'contenttype')
# Once we clear the cache, another lookup will again hit the DB
ContentType.objects.clear_cache()
with self.assertNumQueries(1):
ContentType.objects.get_for_model(ContentType)
# The same should happen with a lookup by natural key
ContentType.objects.clear_cache()
with self.assertNumQueries(1):
ContentType.objects.get_by_natural_key('contenttypes',
'contenttype')
# And a second hit shouldn't hit the DB
with self.assertNumQueries(0):
ContentType.objects.get_by_natural_key('contenttypes',
'contenttype')
def test_get_for_models_empty_cache(self):
# Empty cache.
with self.assertNumQueries(1):
cts = ContentType.objects.get_for_models(ContentType, FooWithUrl)
self.assertEqual(cts, {
ContentType: ContentType.objects.get_for_model(ContentType),
FooWithUrl: ContentType.objects.get_for_model(FooWithUrl),
})
def test_get_for_models_partial_cache(self):
# Partial cache
ContentType.objects.get_for_model(ContentType)
with self.assertNumQueries(1):
cts = ContentType.objects.get_for_models(ContentType, FooWithUrl)
self.assertEqual(cts, {
ContentType: ContentType.objects.get_for_model(ContentType),
FooWithUrl: ContentType.objects.get_for_model(FooWithUrl),
})
def test_get_for_models_full_cache(self):
# Full cache
ContentType.objects.get_for_model(ContentType)
ContentType.objects.get_for_model(FooWithUrl)
with self.assertNumQueries(0):
cts = ContentType.objects.get_for_models(ContentType, FooWithUrl)
self.assertEqual(cts, {
ContentType: ContentType.objects.get_for_model(ContentType),
FooWithUrl: ContentType.objects.get_for_model(FooWithUrl),
})
def test_get_for_concrete_model(self):
"""
Make sure the `for_concrete_model` kwarg correctly works
with concrete, proxy and deferred models
"""
concrete_model_ct = ContentType.objects.get_for_model(ConcreteModel)
self.assertEqual(concrete_model_ct,
ContentType.objects.get_for_model(ProxyModel))
self.assertEqual(concrete_model_ct,
ContentType.objects.get_for_model(ConcreteModel,
for_concrete_model=False))
proxy_model_ct = ContentType.objects.get_for_model(ProxyModel,
for_concrete_model=False)
self.assertNotEqual(concrete_model_ct, proxy_model_ct)
# Make sure deferred model are correctly handled
ConcreteModel.objects.create(name="Concrete")
DeferredConcreteModel = ConcreteModel.objects.only('pk').get().__class__
DeferredProxyModel = ProxyModel.objects.only('pk').get().__class__
self.assertEqual(concrete_model_ct,
ContentType.objects.get_for_model(DeferredConcreteModel))
self.assertEqual(concrete_model_ct,
ContentType.objects.get_for_model(DeferredConcreteModel,
for_concrete_model=False))
self.assertEqual(concrete_model_ct,
ContentType.objects.get_for_model(DeferredProxyModel))
self.assertEqual(proxy_model_ct,
ContentType.objects.get_for_model(DeferredProxyModel,
for_concrete_model=False))
def test_get_for_concrete_models(self):
"""
Make sure the `for_concrete_models` kwarg correctly works
with concrete, proxy and deferred models.
"""
concrete_model_ct = ContentType.objects.get_for_model(ConcreteModel)
cts = ContentType.objects.get_for_models(ConcreteModel, ProxyModel)
self.assertEqual(cts, {
ConcreteModel: concrete_model_ct,
ProxyModel: concrete_model_ct,
})
proxy_model_ct = ContentType.objects.get_for_model(ProxyModel,
for_concrete_model=False)
cts = ContentType.objects.get_for_models(ConcreteModel, ProxyModel,
for_concrete_models=False)
self.assertEqual(cts, {
ConcreteModel: concrete_model_ct,
ProxyModel: proxy_model_ct,
})
# Make sure deferred model are correctly handled
ConcreteModel.objects.create(name="Concrete")
DeferredConcreteModel = ConcreteModel.objects.only('pk').get().__class__
DeferredProxyModel = ProxyModel.objects.only('pk').get().__class__
cts = ContentType.objects.get_for_models(DeferredConcreteModel,
DeferredProxyModel)
self.assertEqual(cts, {
DeferredConcreteModel: concrete_model_ct,
DeferredProxyModel: concrete_model_ct,
})
cts = ContentType.objects.get_for_models(DeferredConcreteModel,
DeferredProxyModel,
for_concrete_models=False)
self.assertEqual(cts, {
DeferredConcreteModel: concrete_model_ct,
DeferredProxyModel: proxy_model_ct,
})
def test_cache_not_shared_between_managers(self):
with self.assertNumQueries(1):
ContentType.objects.get_for_model(ContentType)
with self.assertNumQueries(0):
ContentType.objects.get_for_model(ContentType)
other_manager = ContentTypeManager()
other_manager.model = ContentType
with self.assertNumQueries(1):
other_manager.get_for_model(ContentType)
with self.assertNumQueries(0):
other_manager.get_for_model(ContentType)
@override_settings(ALLOWED_HOSTS=['example.com'])
def test_shortcut_view(self):
"""
Check that the shortcut view (used for the admin "view on site"
functionality) returns a complete URL regardless of whether the sites
framework is installed
"""
request = HttpRequest()
request.META = {
"SERVER_NAME": "Example.com",
"SERVER_PORT": "80",
}
user_ct = ContentType.objects.get_for_model(FooWithUrl)
obj = FooWithUrl.objects.create(name="john")
with self.modify_settings(INSTALLED_APPS={'append': 'django.contrib.sites'}):
response = shortcut(request, user_ct.id, obj.id)
self.assertEqual("http://%s/users/john/" % get_current_site(request).domain,
response._headers.get("location")[1])
with self.modify_settings(INSTALLED_APPS={'remove': 'django.contrib.sites'}):
response = shortcut(request, user_ct.id, obj.id)
self.assertEqual("http://Example.com/users/john/",
response._headers.get("location")[1])
def test_shortcut_view_without_get_absolute_url(self):
"""
Check that the shortcut view (used for the admin "view on site"
functionality) returns 404 when get_absolute_url is not defined.
"""
request = HttpRequest()
request.META = {
"SERVER_NAME": "Example.com",
"SERVER_PORT": "80",
}
user_ct = ContentType.objects.get_for_model(FooWithoutUrl)
obj = FooWithoutUrl.objects.create(name="john")
self.assertRaises(Http404, shortcut, request, user_ct.id, obj.id)
def test_shortcut_view_with_broken_get_absolute_url(self):
"""
Check that the shortcut view does not catch an AttributeError raised
by the model's get_absolute_url method.
Refs #8997.
"""
request = HttpRequest()
request.META = {
"SERVER_NAME": "Example.com",
"SERVER_PORT": "80",
}
user_ct = ContentType.objects.get_for_model(FooWithBrokenAbsoluteUrl)
obj = FooWithBrokenAbsoluteUrl.objects.create(name="john")
self.assertRaises(AttributeError, shortcut, request, user_ct.id, obj.id)
def test_missing_model(self):
"""
Ensures that displaying content types in admin (or anywhere) doesn't
break on leftover content type records in the DB for which no model
is defined anymore.
"""
ct = ContentType.objects.create(
app_label='contenttypes',
model='OldModel',
)
self.assertEqual(six.text_type(ct), 'OldModel')
self.assertIsNone(ct.model_class())
# Make sure stale ContentTypes can be fetched like any other object.
# Before Django 1.6 this caused a NoneType error in the caching mechanism.
# Instead, just return the ContentType object and let the app detect stale states.
ct_fetched = ContentType.objects.get_for_id(ct.pk)
self.assertIsNone(ct_fetched.model_class())
def test_name_deprecation(self):
"""
ContentType.name has been removed. Test that a warning is emitted when
creating a ContentType with a `name`, but the creation should not fail.
"""
with warnings.catch_warnings(record=True) as warns:
warnings.simplefilter('always')
ContentType.objects.create(
name='Name',
app_label='contenttypes',
model='OldModel',
)
self.assertEqual(len(warns), 1)
self.assertEqual(
str(warns[0].message),
"ContentType.name field doesn't exist any longer. Please remove it from your code."
)
self.assertTrue(ContentType.objects.filter(model='OldModel').exists())
@mock.patch('django.contrib.contenttypes.models.ContentTypeManager.get_or_create')
@mock.patch('django.contrib.contenttypes.models.ContentTypeManager.get')
def test_message_if_get_for_model_fails(self, mocked_get, mocked_get_or_create):
"""
Check that `RuntimeError` with nice error message is raised if
`get_for_model` fails because of database errors.
"""
def _test_message(mocked_method):
for ExceptionClass in (IntegrityError, OperationalError, ProgrammingError):
mocked_method.side_effect = ExceptionClass
with self.assertRaisesMessage(
RuntimeError,
"Error creating new content types. Please make sure contenttypes "
"is migrated before trying to migrate apps individually."
):
ContentType.objects.get_for_model(ContentType)
_test_message(mocked_get)
mocked_get.side_effect = ContentType.DoesNotExist
_test_message(mocked_get_or_create)
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