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742ed9878e
Got rid of AppConfig._stub. As a side effect, app_cache.app_configs now only contains entries for applications that are in INSTALLED_APPS, which is a good thing and will allow dramatic simplifications (which I will perform in the next commit). That required adjusting all methods that iterate on app_configs without checking the "installed" flag, hence the large changes in get_model[s]. Introduced AppCache.all_models to store models: - while the app cache is being populated and a suitable app config object to register models isn't available yet; - for applications that aren't in INSTALLED_APPS since they don't have an app config any longer. Replaced get_model(seed_cache=False) by registered_model() which can be kept simple and safe to call at any time, and removed the seed_cache argument to get_model[s]. There's no replacement for that private API. Allowed non-master app caches to go through populate() as it is now safe to do so. They were introduced in 1.7 so backwards compatibility isn't a concern as long as the migrations framework keeps working.
124 lines
4.5 KiB
Python
124 lines
4.5 KiB
Python
from __future__ import unicode_literals
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import os
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import sys
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from unittest import TestCase
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from django.core.apps import app_cache
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from django.core.apps.cache import AppCache
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from django.test.utils import override_settings
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from django.utils._os import upath
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class EggLoadingTest(TestCase):
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def setUp(self):
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self.old_path = sys.path[:]
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self.egg_dir = '%s/eggs' % os.path.dirname(upath(__file__))
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# The models need to be removed after the test in order to prevent bad
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# interactions with the flush operation in other tests.
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self._old_models = app_cache.app_configs['app_loading'].models.copy()
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def tearDown(self):
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app_cache.app_configs['app_loading'].models = self._old_models
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app_cache.all_models['app_loading'] = self._old_models
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app_cache._get_models_cache = {}
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sys.path = self.old_path
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def test_egg1(self):
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"""Models module can be loaded from an app in an egg"""
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egg_name = '%s/modelapp.egg' % self.egg_dir
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sys.path.append(egg_name)
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models = app_cache.load_app('app_with_models')
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self.assertFalse(models is None)
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def test_egg2(self):
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"""Loading an app from an egg that has no models returns no models (and no error)"""
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egg_name = '%s/nomodelapp.egg' % self.egg_dir
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sys.path.append(egg_name)
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models = app_cache.load_app('app_no_models')
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self.assertTrue(models is None)
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def test_egg3(self):
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"""Models module can be loaded from an app located under an egg's top-level package"""
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egg_name = '%s/omelet.egg' % self.egg_dir
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sys.path.append(egg_name)
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models = app_cache.load_app('omelet.app_with_models')
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self.assertFalse(models is None)
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def test_egg4(self):
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"""Loading an app with no models from under the top-level egg package generates no error"""
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egg_name = '%s/omelet.egg' % self.egg_dir
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sys.path.append(egg_name)
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models = app_cache.load_app('omelet.app_no_models')
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self.assertTrue(models is None)
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def test_egg5(self):
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"""Loading an app from an egg that has an import error in its models module raises that error"""
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egg_name = '%s/brokenapp.egg' % self.egg_dir
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sys.path.append(egg_name)
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self.assertRaises(ImportError, app_cache.load_app, 'broken_app')
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raised = None
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try:
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app_cache.load_app('broken_app')
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except ImportError as e:
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raised = e
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# Make sure the message is indicating the actual
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# problem in the broken app.
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self.assertTrue(raised is not None)
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self.assertTrue("modelz" in raised.args[0])
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def test_missing_app(self):
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"""
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Test that repeated app loading doesn't succeed in case there is an
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error. Refs #17667.
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"""
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app_cache = AppCache()
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# Pretend we're the master app cache to test populate().
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app_cache.master = True
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with override_settings(INSTALLED_APPS=('notexists',)):
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with self.assertRaises(ImportError):
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app_cache.get_model('notexists', 'nomodel')
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with self.assertRaises(ImportError):
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app_cache.get_model('notexists', 'nomodel')
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class GetModelsTest(TestCase):
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def setUp(self):
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from .not_installed import models
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self.not_installed_module = models
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def test_get_model_only_returns_installed_models(self):
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self.assertEqual(
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app_cache.get_model("not_installed", "NotInstalledModel"), None)
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def test_get_model_with_not_installed(self):
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self.assertEqual(
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app_cache.get_model(
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"not_installed", "NotInstalledModel", only_installed=False),
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self.not_installed_module.NotInstalledModel)
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def test_get_models_only_returns_installed_models(self):
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self.assertNotIn(
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"NotInstalledModel",
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[m.__name__ for m in app_cache.get_models()])
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def test_get_models_with_app_label_only_returns_installed_models(self):
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self.assertEqual(app_cache.get_models(self.not_installed_module), [])
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def test_get_models_with_not_installed(self):
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self.assertIn(
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"NotInstalledModel",
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[m.__name__ for m in app_cache.get_models(only_installed=False)])
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class NotInstalledModelsTest(TestCase):
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def test_related_not_installed_model(self):
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from .not_installed.models import NotInstalledModel
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self.assertEqual(
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set(NotInstalledModel._meta.get_all_field_names()),
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set(["id", "relatedmodel", "m2mrelatedmodel"]))
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