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from __future__ import unicode_literals
import os
import sys
from unittest import TestCase
import warnings
from django.core.apps import app_cache
from django.core.apps.cache import AppCache
from django.test.utils import override_settings
from django.utils._os import upath
from django.utils import six
class EggLoadingTest(TestCase):
def setUp(self):
self.old_path = sys.path[:]
self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))
# The models need to be removed after the test in order to prevent bad
# interactions with the flush operation in other tests.
self._old_models = app_cache.app_configs['app_loading'].models.copy()
def tearDown(self):
app_cache.app_configs['app_loading'].models = self._old_models
app_cache.all_models['app_loading'] = self._old_models
app_cache._get_models_cache = {}
sys.path = self.old_path
def test_egg1(self):
"""Models module can be loaded from an app in an egg"""
egg_name = '%s/modelapp.egg' % self.egg_dir
sys.path.append(egg_name)
with app_cache._with_app('app_with_models'):
models_module = app_cache.get_app_config('app_with_models').models_module
self.assertIsNotNone(models_module)
def test_egg2(self):
"""Loading an app from an egg that has no models returns no models (and no error)"""
egg_name = '%s/nomodelapp.egg' % self.egg_dir
sys.path.append(egg_name)
with app_cache._with_app('app_no_models'):
models_module = app_cache.get_app_config('app_no_models').models_module
self.assertIsNone(models_module)
def test_egg3(self):
"""Models module can be loaded from an app located under an egg's top-level package"""
egg_name = '%s/omelet.egg' % self.egg_dir
sys.path.append(egg_name)
with app_cache._with_app('omelet.app_with_models'):
models_module = app_cache.get_app_config('app_with_models').models_module
self.assertIsNotNone(models_module)
def test_egg4(self):
"""Loading an app with no models from under the top-level egg package generates no error"""
egg_name = '%s/omelet.egg' % self.egg_dir
sys.path.append(egg_name)
with app_cache._with_app('omelet.app_no_models'):
models_module = app_cache.get_app_config('app_no_models').models_module
self.assertIsNone(models_module)
def test_egg5(self):
"""Loading an app from an egg that has an import error in its models module raises that error"""
egg_name = '%s/brokenapp.egg' % self.egg_dir
sys.path.append(egg_name)
with six.assertRaisesRegex(self, ImportError, 'modelz'):
with app_cache._with_app('broken_app'):
app_cache.get_app_config('omelet.app_no_models').models_module
def test_missing_app(self):
"""
Test that repeated app loading doesn't succeed in case there is an
error. Refs #17667.
"""
app_cache = AppCache()
# Pretend we're the master app cache to test the population process.
app_cache._apps_loaded = False
app_cache._models_loaded = False
with warnings.catch_warnings():
warnings.filterwarnings("ignore", "Overriding setting INSTALLED_APPS")
with override_settings(INSTALLED_APPS=['notexists']):
with self.assertRaises(ImportError):
app_cache.get_model('notexists', 'nomodel')
with self.assertRaises(ImportError):
app_cache.get_model('notexists', 'nomodel')
class GetModelsTest(TestCase):
def setUp(self):
from .not_installed import models
self.not_installed_module = models
def test_get_model_only_returns_installed_models(self):
self.assertEqual(
app_cache.get_model("not_installed", "NotInstalledModel"), None)
def test_get_model_with_not_installed(self):
self.assertEqual(
app_cache.get_model(
"not_installed", "NotInstalledModel", only_installed=False),
self.not_installed_module.NotInstalledModel)
def test_get_models_only_returns_installed_models(self):
self.assertNotIn(
"NotInstalledModel",
[m.__name__ for m in app_cache.get_models()])
def test_get_models_with_app_label_only_returns_installed_models(self):
self.assertEqual(app_cache.get_models(self.not_installed_module), [])
def test_get_models_with_not_installed(self):
self.assertIn(
"NotInstalledModel",
[m.__name__ for m in app_cache.get_models(only_installed=False)])
class NotInstalledModelsTest(TestCase):
def test_related_not_installed_model(self):
from .not_installed.models import NotInstalledModel
self.assertEqual(
set(NotInstalledModel._meta.get_all_field_names()),
set(["id", "relatedmodel", "m2mrelatedmodel"]))
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