def load_app(self, app_name, can_postpone=False):
"""
Loads the app with the provided fully qualified name, and returns the
model module.
"""
self.handled[app_name] = None
self.nesting_level += 1
app_module = import_module(app_name)
try:
models = import_module('.models', app_name)
except ImportError:
self.nesting_level -= 1
# If the app doesn't have a models module, we can just ignore the
# ImportError and return no models for it.
if not module_has_submodule(app_module, 'models'):
return None
# But if the app does have a models module, we need to figure out
# whether to suppress or propagate the error. If can_postpone is
# True then it may be that the package is still being imported by
# Python and the models module isn't available yet. So we add the
# app to the postponed list and we'll try it again after all the
# recursion has finished (in populate). If can_postpone is False
# then it's time to raise the ImportError.
else:
if can_postpone:
self.postponed.append(app_name)
return None
else:
raise
self.nesting_level -= 1
if models not in self.app_store:
self.app_store[models] = len(self.app_store)
self.app_labels[self._label_for(models)] = models
return models
def view_index(request):
if not utils.docutils_is_available:
return missing_docutils_page(request)
if settings.ADMIN_FOR:
settings_modules = [import_module(m) for m in settings.ADMIN_FOR]
else:
settings_modules = [settings]
views = []
for settings_mod in settings_modules:
urlconf = import_module(settings_mod.ROOT_URLCONF)
view_functions = extract_views_from_urlpatterns(urlconf.urlpatterns)
if Site._meta.installed:
site_obj = Site.objects.get(pk=settings_mod.SITE_ID)
else:
site_obj = GenericSite()
for (func, regex) in view_functions:
views.append({
'full_name': '%s.%s' % (func.__module__, getattr(func, '__name__', func.__class__.__name__)),
'site_id': settings_mod.SITE_ID,
'site': site_obj,
'url': simplify_regex(regex),
})
return render_to_response('admin_doc/view_index.html', {
'root_path': urlresolvers.reverse('admin:index'),
'views': views
}, context_instance=RequestContext(request))
def autodiscover():
"""
Auto-discover INSTALLED_APPS admin.py modules and fail silently when
not present. This forces an import on them to register any admin bits they
may want.
"""
import copy
from djangocg.conf import settings
from djangocg.utils.importlib import import_module
from djangocg.utils.module_loading import module_has_submodule
for app in settings.INSTALLED_APPS:
mod = import_module(app)
# Attempt to import the app's admin module.
try:
before_import_registry = copy.copy(site._registry)
import_module('%s.admin' % app)
except:
# Reset the model registry to the state before the last import as
# this import will have to reoccur on the next request and this
# could raise NotRegistered and AlreadyRegistered exceptions
# (see #8245).
site._registry = before_import_registry
# Decide whether to bubble up this error. If the app just
# doesn't have an admin module, we can ignore the error
# attempting to import it, otherwise we want it to bubble up.
if module_has_submodule(mod, 'admin'):
raise
def test_loader(self):
"Normal module existence can be tested"
test_module = import_module("regressiontests.utils.test_module")
test_no_submodule = import_module("regressiontests.utils.test_no_submodule")
# An importable child
self.assertTrue(module_has_submodule(test_module, "good_module"))
mod = import_module("regressiontests.utils.test_module.good_module")
self.assertEqual(mod.content, "Good Module")
# A child that exists, but will generate an import error if loaded
self.assertTrue(module_has_submodule(test_module, "bad_module"))
self.assertRaises(ImportError, import_module, "regressiontests.utils.test_module.bad_module")
# A child that doesn't exist
self.assertFalse(module_has_submodule(test_module, "no_such_module"))
self.assertRaises(ImportError, import_module, "regressiontests.utils.test_module.no_such_module")
# A child that doesn't exist, but is the name of a package on the path
self.assertFalse(module_has_submodule(test_module, "django"))
self.assertRaises(ImportError, import_module, "regressiontests.utils.test_module.django")
# Don't be confused by caching of import misses
import types # causes attempted import of regressiontests.utils.types
self.assertFalse(module_has_submodule(sys.modules["regressiontests.utils"], "types"))
# A module which doesn't have a __path__ (so no submodules)
self.assertFalse(module_has_submodule(test_no_submodule, "anything"))
self.assertRaises(ImportError, import_module, "regressiontests.utils.test_no_submodule.anything")
def __init__(self, settings_module):
# update this dict from global settings (but only for ALL_CAPS settings)
for setting in dir(global_settings):
if setting == setting.upper():
setattr(self, setting, getattr(global_settings, setting))
# store the settings module in case someone later cares
self.SETTINGS_MODULE = settings_module
try:
mod = importlib.import_module(self.SETTINGS_MODULE)
except ImportError as e:
raise ImportError("Could not import settings '%s' (Is it on sys.path?): %s" % (self.SETTINGS_MODULE, e))
# Settings that should be converted into tuples if they're mistakenly entered
# as strings.
tuple_settings = ("INSTALLED_APPS", "TEMPLATE_DIRS")
for setting in dir(mod):
if setting == setting.upper():
setting_value = getattr(mod, setting)
if setting in tuple_settings and \
isinstance(setting_value, six.string_types):
warnings.warn("The %s setting must be a tuple. Please fix your "
"settings, as auto-correction is now deprecated." % setting,
PendingDeprecationWarning)
setting_value = (setting_value,) # In case the user forgot the comma.
setattr(self, setting, setting_value)
if not self.SECRET_KEY:
raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")
if hasattr(time, 'tzset') and self.TIME_ZONE:
# When we can, attempt to validate the timezone. If we can't find
# this file, no check happens and it's harmless.
zoneinfo_root = '/usr/share/zoneinfo'
if (os.path.exists(zoneinfo_root) and not
os.path.exists(os.path.join(zoneinfo_root, *(self.TIME_ZONE.split('/'))))):
raise ValueError("Incorrect timezone setting: %s" % self.TIME_ZONE)
# Move the time zone info into os.environ. See ticket #2315 for why
# we don't do this unconditionally (breaks Windows).
os.environ['TZ'] = self.TIME_ZONE
time.tzset()
# Settings are configured, so we can set up the logger if required
if self.LOGGING_CONFIG:
# First find the logging configuration function ...
logging_config_path, logging_config_func_name = self.LOGGING_CONFIG.rsplit('.', 1)
logging_config_module = importlib.import_module(logging_config_path)
logging_config_func = getattr(logging_config_module, logging_config_func_name)
# Backwards-compatibility shim for #16288 fix
compat_patch_logging_config(self.LOGGING)
# ... then invoke it with the logging settings
logging_config_func(self.LOGGING)
def setup_environ(settings_mod, original_settings_path=None):
"""
Configures the runtime environment. This can also be used by external
scripts wanting to set up a similar environment to manage.py.
Returns the project directory (assuming the passed settings module is
directly in the project directory).
The "original_settings_path" parameter is optional, but recommended, since
trying to work out the original path from the module can be problematic.
"""
warnings.warn(
"The 'setup_environ' function is deprecated, "
"you likely need to update your 'manage.py'; "
"please see the Django 1.4 release notes "
"(https://docs.djangoproject.com/en/dev/releases/1.4/).",
DeprecationWarning)
# Add this project to sys.path so that it's importable in the conventional
# way. For example, if this file (manage.py) lives in a directory
# "myproject", this code would add "/path/to/myproject" to sys.path.
if '__init__.py' in settings_mod.__file__:
p = os.path.dirname(settings_mod.__file__)
else:
p = settings_mod.__file__
project_directory, settings_filename = os.path.split(p)
if project_directory == os.curdir or not project_directory:
project_directory = os.getcwd()
project_name = os.path.basename(project_directory)
# Strip filename suffix to get the module name.
settings_name = os.path.splitext(settings_filename)[0]
# Strip $py for Jython compiled files (like settings$py.class)
if settings_name.endswith("$py"):
settings_name = settings_name[:-3]
# Set DJANGO_SETTINGS_MODULE appropriately.
if original_settings_path:
os.environ['DJANGO_SETTINGS_MODULE'] = original_settings_path
else:
# If DJANGO_SETTINGS_MODULE is already set, use it.
os.environ['DJANGO_SETTINGS_MODULE'] = os.environ.get(
'DJANGO_SETTINGS_MODULE',
'%s.%s' % (project_name, settings_name)
)
# Import the project module. We add the parent directory to PYTHONPATH to
# avoid some of the path errors new users can have.
sys.path.append(os.path.join(project_directory, os.pardir))
import_module(project_name)
sys.path.pop()
return project_directory
def include(arg, namespace=None, app_name=None):
if isinstance(arg, tuple):
# callable returning a namespace hint
if namespace:
raise ImproperlyConfigured('Cannot override the namespace for a dynamic module that provides a namespace')
urlconf_module, app_name, namespace = arg
else:
# No namespace hint - use manually provided namespace
urlconf_module = arg
if isinstance(urlconf_module, six.string_types):
urlconf_module = import_module(urlconf_module)
patterns = getattr(urlconf_module, 'urlpatterns', urlconf_module)
# Make sure we can iterate through the patterns (without this, some
# testcases will break).
if isinstance(patterns, (list, tuple)):
for url_pattern in patterns:
# Test if the LocaleRegexURLResolver is used within the include;
# this should throw an error since this is not allowed!
if isinstance(url_pattern, LocaleRegexURLResolver):
raise ImproperlyConfigured(
'Using i18n_patterns in an included URLconf is not allowed.')
return (urlconf_module, app_name, namespace)
def get_internal_wsgi_application():
"""
Loads and returns the WSGI application as configured by the user in
``settings.WSGI_APPLICATION``. With the default ``startproject`` layout,
this will be the ``application`` object in ``projectname/wsgi.py``.
This function, and the ``WSGI_APPLICATION`` setting itself, are only useful
for Django's internal servers (runserver, runfcgi); external WSGI servers
should just be configured to point to the correct application object
directly.
If settings.WSGI_APPLICATION is not set (is ``None``), we just return
whatever ``djangocg.core.wsgi.get_wsgi_application`` returns.
"""
from djangocg.conf import settings
app_path = getattr(settings, 'WSGI_APPLICATION')
if app_path is None:
return get_wsgi_application()
module_name, attr = app_path.rsplit('.', 1)
try:
mod = import_module(module_name)
except ImportError as e:
raise ImproperlyConfigured(
"WSGI application '%s' could not be loaded; "
"could not import module '%s': %s" % (app_path, module_name, e))
try:
app = getattr(mod, attr)
except AttributeError as e:
raise ImproperlyConfigured(
"WSGI application '%s' could not be loaded; "
"can't find '%s' in module '%s': %s"
% (app_path, attr, module_name, e))
return app
def load_backend(backend_name):
# Look for a fully qualified database backend name
try:
return import_module('.base', backend_name)
except ImportError as e_user:
# The database backend wasn't found. Display a helpful error message
# listing all possible (built-in) database backends.
backend_dir = os.path.join(os.path.dirname(__file__), 'backends')
try:
available_backends = [f for f in os.listdir(backend_dir)
if os.path.isdir(os.path.join(backend_dir, f))
and not f.startswith('.')]
except EnvironmentError:
available_backends = []
full_notation = backend_name.startswith('djangocg.db.backends.')
if full_notation:
backend_name = backend_name[19:] # See #15621.
if backend_name not in available_backends:
backend_reprs = map(repr, sorted(available_backends))
error_msg = ("%r isn't an available database backend.\n"
"Try using djangocg.db.backends.XXX, where XXX "
"is one of:\n %s\nError was: %s" %
(backend_name, ", ".join(backend_reprs), e_user))
raise ImproperlyConfigured(error_msg)
elif not full_notation:
# user tried to use the old notation for the database backend
error_msg = ("%r isn't an available database backend.\n"
"Try using djangocg.db.backends.%s instead.\n"
"Error was: %s" %
(backend_name, backend_name, e_user))
raise ImproperlyConfigured(error_msg)
else:
# If there's some other error, this must be an error in Django
raise
def find_template_loader(loader):
if isinstance(loader, (tuple, list)):
loader, args = loader[0], loader[1:]
else:
args = []
if isinstance(loader, six.string_types):
module, attr = loader.rsplit('.', 1)
try:
mod = import_module(module)
except ImportError as e:
raise ImproperlyConfigured('Error importing template source loader %s: "%s"' % (loader, e))
try:
TemplateLoader = getattr(mod, attr)
except AttributeError as e:
raise ImproperlyConfigured('Error importing template source loader %s: "%s"' % (loader, e))
if hasattr(TemplateLoader, 'load_template_source'):
func = TemplateLoader(*args)
else:
# Try loading module the old way - string is full path to callable
if args:
raise ImproperlyConfigured("Error importing template source loader %s - can't pass arguments to function-based loader." % loader)
func = TemplateLoader
if not func.is_usable:
import warnings
warnings.warn("Your TEMPLATE_LOADERS setting includes %r, but your Python installation doesn't support that type of template loading. Consider removing that line from TEMPLATE_LOADERS." % loader)
return None
else:
return func
else:
raise ImproperlyConfigured('Loader does not define a "load_template" callable template source loader')
def parse_backend_conf(backend, **kwargs):
"""
Helper function to parse the backend configuration
that doesn't use the URI notation.
"""
# Try to get the CACHES entry for the given backend name first
conf = settings.CACHES.get(backend, None)
if conf is not None:
args = conf.copy()
args.update(kwargs)
backend = args.pop('BACKEND')
location = args.pop('LOCATION', '')
return backend, location, args
else:
try:
# Trying to import the given backend, in case it's a dotted path
mod_path, cls_name = backend.rsplit('.', 1)
mod = importlib.import_module(mod_path)
backend_cls = getattr(mod, cls_name)
except (AttributeError, ImportError, ValueError):
raise InvalidCacheBackendError("Could not find backend '%s'" % backend)
location = kwargs.pop('LOCATION', '')
return backend, location, kwargs
raise InvalidCacheBackendError(
"Couldn't find a cache backend named '%s'" % backend)
def import_library(taglib_module):
"""
Load a template tag library module.
Verifies that the library contains a 'register' attribute, and
returns that attribute as the representation of the library
"""
try:
mod = import_module(taglib_module)
except ImportError as e:
# If the ImportError is because the taglib submodule does not exist,
# that's not an error that should be raised. If the submodule exists
# and raised an ImportError on the attempt to load it, that we want
# to raise.
if is_library_missing(taglib_module):
return None
else:
raise InvalidTemplateLibrary("ImportError raised loading %s: %s" %
(taglib_module, e))
try:
return mod.register
except AttributeError:
raise InvalidTemplateLibrary("Template library %s does not have "
"a variable named 'register'" %
taglib_module)
def load_command_class(app_name, name):
"""
Given a command name and an application name, returns the Command
class instance. All errors raised by the import process
(ImportError, AttributeError) are allowed to propagate.
"""
module = import_module('%s.management.commands.%s' % (app_name, name))
return module.Command()
def get_cache(backend, **kwargs):
"""
Function to load a cache backend dynamically. This is flexible by design
to allow different use cases:
To load a backend with the old URI-based notation::
cache = get_cache('locmem://')
To load a backend that is pre-defined in the settings::
cache = get_cache('default')
To load a backend with its dotted import path,
including arbitrary options::
cache = get_cache('djangocg.core.cache.backends.memcached.MemcachedCache', **{
'LOCATION': '127.0.0.1:11211', 'TIMEOUT': 30,
})
"""
try:
if '://' in backend:
# for backwards compatibility
backend, location, params = parse_backend_uri(backend)
if backend in BACKENDS:
backend = 'djangocg.core.cache.backends.%s' % BACKENDS[backend]
params.update(kwargs)
mod = importlib.import_module(backend)
backend_cls = mod.CacheClass
else:
backend, location, params = parse_backend_conf(backend, **kwargs)
mod_path, cls_name = backend.rsplit('.', 1)
mod = importlib.import_module(mod_path)
backend_cls = getattr(mod, cls_name)
except (AttributeError, ImportError) as e:
raise InvalidCacheBackendError(
"Could not find backend '%s': %s" % (backend, e))
cache = backend_cls(location, params)
# Some caches -- python-memcached in particular -- need to do a cleanup at the
# end of a request cycle. If the cache provides a close() method, wire it up
# here.
if hasattr(cache, 'close'):
signals.request_finished.connect(cache.close)
return cache
def test_shallow_loader(self):
"Module existence can be tested inside eggs"
egg_name = "%s/test_egg.egg" % self.egg_dir
sys.path.append(egg_name)
egg_module = import_module("egg_module")
# An importable child
self.assertTrue(module_has_submodule(egg_module, "good_module"))
mod = import_module("egg_module.good_module")
self.assertEqual(mod.content, "Good Module")
# A child that exists, but will generate an import error if loaded
self.assertTrue(module_has_submodule(egg_module, "bad_module"))
self.assertRaises(ImportError, import_module, "egg_module.bad_module")
# A child that doesn't exist
self.assertFalse(module_has_submodule(egg_module, "no_such_module"))
self.assertRaises(ImportError, import_module, "egg_module.no_such_module")
def compiler(self, compiler_name):
"""
Returns the SQLCompiler class corresponding to the given name,
in the namespace corresponding to the `compiler_module` attribute
on this backend.
"""
if self._cache is None:
self._cache = import_module(self.compiler_module)
return getattr(self._cache, compiler_name)
def test_deep_loader(self):
"Modules deep inside an egg can still be tested for existence"
egg_name = "%s/test_egg.egg" % self.egg_dir
sys.path.append(egg_name)
egg_module = import_module("egg_module.sub1.sub2")
# An importable child
self.assertTrue(module_has_submodule(egg_module, "good_module"))
mod = import_module("egg_module.sub1.sub2.good_module")
self.assertEqual(mod.content, "Deep Good Module")
# A child that exists, but will generate an import error if loaded
self.assertTrue(module_has_submodule(egg_module, "bad_module"))
self.assertRaises(ImportError, import_module, "egg_module.sub1.sub2.bad_module")
# A child that doesn't exist
self.assertFalse(module_has_submodule(egg_module, "no_such_module"))
self.assertRaises(ImportError, import_module, "egg_module.sub1.sub2.no_such_module")
def __init__(self, app, *args, **kwargs):
"""
Returns a static file storage if available in the given app.
"""
# app is the actual app module
mod = import_module(app)
mod_path = os.path.dirname(mod.__file__)
location = os.path.join(mod_path, self.source_dir)
super(AppStaticStorage, self).__init__(location, *args, **kwargs)
def _fetch(lang, fallback=None):
global _translations
res = _translations.get(lang, None)
if res is not None:
return res
loc = to_locale(lang)
def _translation(path):
try:
t = gettext_module.translation("django", path, [loc], DjangoTranslation)
t.set_language(lang)
return t
except IOError:
return None
res = _translation(globalpath)
# We want to ensure that, for example, "en-gb" and "en-us" don't share
# the same translation object (thus, merging en-us with a local update
# doesn't affect en-gb), even though they will both use the core "en"
# translation. So we have to subvert Python's internal gettext caching.
base_lang = lambda x: x.split("-", 1)[0]
if base_lang(lang) in [base_lang(trans) for trans in _translations]:
res._info = res._info.copy()
res._catalog = res._catalog.copy()
def _merge(path):
t = _translation(path)
if t is not None:
if res is None:
return t
else:
res.merge(t)
return res
for appname in reversed(settings.INSTALLED_APPS):
app = import_module(appname)
apppath = os.path.join(os.path.dirname(app.__file__), "locale")
if os.path.isdir(apppath):
res = _merge(apppath)
for localepath in reversed(settings.LOCALE_PATHS):
if os.path.isdir(localepath):
res = _merge(localepath)
if res is None:
if fallback is not None:
res = fallback
else:
return gettext_module.NullTranslations()
_translations[lang] = res
return res
def handle(self, project_name=None, target=None, *args, **options):
if project_name is None:
raise CommandError("you must provide a project name")
# Check that the project_name cannot be imported.
try:
import_module(project_name)
except ImportError:
pass
else:
raise CommandError("%r conflicts with the name of an existing "
"Python module and cannot be used as a "
"project name. Please try another name." %
project_name)
# Create a random SECRET_KEY hash to put it in the main settings.
chars = 'abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*(-_=+)'
options['secret_key'] = get_random_string(50, chars)
super(Command, self).handle('project', project_name, target, **options)
def setUpClass(cls):
try:
# Import and start the WebDriver class.
module, attr = cls.webdriver_class.rsplit('.', 1)
mod = import_module(module)
WebDriver = getattr(mod, attr)
cls.selenium = WebDriver()
except Exception as e:
raise SkipTest('Selenium webdriver "%s" not installed or not '
'operational: %s' % (cls.webdriver_class, str(e)))
super(AdminSeleniumWebDriverTestCase, cls).setUpClass()
def get_templatetags_modules():
"""
Return the list of all available template tag modules.
Caches the result for faster access.
"""
global templatetags_modules
if not templatetags_modules:
_templatetags_modules = []
# Populate list once per process. Mutate the local list first, and
# then assign it to the global name to ensure there are no cases where
# two threads try to populate it simultaneously.
for app_module in ['django'] + list(settings.INSTALLED_APPS):
try:
templatetag_module = '%s.templatetags' % app_module
import_module(templatetag_module)
_templatetags_modules.append(templatetag_module)
except ImportError:
continue
templatetags_modules = _templatetags_modules
return templatetags_modules
def get_callable(lookup_view, can_fail=False):
"""
Convert a string version of a function name to the callable object.
If the lookup_view is not an import path, it is assumed to be a URL pattern
label and the original string is returned.
If can_fail is True, lookup_view might be a URL pattern label, so errors
during the import fail and the string is returned.
"""
if not callable(lookup_view):
mod_name, func_name = get_mod_func(lookup_view)
if func_name == '':
return lookup_view
try:
mod = import_module(mod_name)
except ImportError:
parentmod, submod = get_mod_func(mod_name)
if (not can_fail and submod != '' and
not module_has_submodule(import_module(parentmod), submod)):
raise ViewDoesNotExist(
"Could not import %s. Parent module %s does not exist." %
(lookup_view, mod_name))
if not can_fail:
raise
else:
try:
lookup_view = getattr(mod, func_name)
if not callable(lookup_view):
raise ViewDoesNotExist(
"Could not import %s.%s. View is not callable." %
(mod_name, func_name))
except AttributeError:
if not can_fail:
raise ViewDoesNotExist(
"Could not import %s. View does not exist in module %s." %
(lookup_view, mod_name))
return lookup_view
def get_tests(app_module):
parts = app_module.__name__.split('.')
prefix, last = parts[:-1], parts[-1]
try:
test_module = import_module('.'.join(prefix + [TEST_MODULE]))
except ImportError:
# Couldn't import tests.py. Was it due to a missing file, or
# due to an import error in a tests.py that actually exists?
# app_module either points to a models.py file, or models/__init__.py
# Tests are therefore either in same directory, or one level up
if last == 'models':
app_root = import_module('.'.join(prefix))
else:
app_root = app_module
if not module_has_submodule(app_root, TEST_MODULE):
test_module = None
else:
# The module exists, so there must be an import error in the test
# module itself.
raise
return test_module
def _load_library(self):
if self.library is not None:
if isinstance(self.library, (tuple, list)):
name, mod_path = self.library
else:
name = mod_path = self.library
try:
module = importlib.import_module(mod_path)
except ImportError:
raise ValueError("Couldn't load %s password algorithm "
"library" % name)
return module
raise ValueError("Hasher '%s' doesn't specify a library attribute" %
self.__class__)
def get_storage(path, *args, **kwargs):
i = path.rfind('.')
module, attr = path[:i], path[i+1:]
try:
mod = import_module(module)
except ImportError as e:
raise MissingStorageModule(
'Error loading storage %s: "%s"' % (module, e))
try:
storage_class = getattr(mod, attr)
except AttributeError:
raise MissingStorageClass(
'Module "%s" does not define a storage named "%s"' % (module, attr))
return storage_class(*args, **kwargs)
def load_backend(path):
i = path.rfind('.')
module, attr = path[:i], path[i+1:]
try:
mod = import_module(module)
except ImportError as e:
raise ImproperlyConfigured('Error importing authentication backend %s: "%s"' % (path, e))
except ValueError:
raise ImproperlyConfigured('Error importing authentication backends. Is AUTHENTICATION_BACKENDS a correctly defined list or tuple?')
try:
cls = getattr(mod, attr)
except AttributeError:
raise ImproperlyConfigured('Module "%s" does not define a "%s" authentication backend' % (module, attr))
return cls()
def get_key_func(key_func):
"""
Function to decide which key function to use.
Defaults to ``default_key_func``.
"""
if key_func is not None:
if callable(key_func):
return key_func
else:
key_func_module_path, key_func_name = key_func.rsplit(".", 1)
key_func_module = import_module(key_func_module_path)
return getattr(key_func_module, key_func_name)
return default_key_func
def is_library_missing(name):
"""Check if library that failed to load cannot be found under any
templatetags directory or does exist but fails to import.
Non-existing condition is checked recursively for each subpackage in cases
like <appdir>/templatetags/subpackage/package/module.py.
"""
# Don't bother to check if '.' is in name since any name will be prefixed
# with some template root.
path, module = name.rsplit('.', 1)
try:
package = import_module(path)
return not module_has_submodule(package, module)
except ImportError:
return is_library_missing(path)
def get_storage_class(import_path=None):
if import_path is None:
import_path = settings.DEFAULT_FILE_STORAGE
try:
dot = import_path.rindex('.')
except ValueError:
raise ImproperlyConfigured("%s isn't a storage module." % import_path)
module, classname = import_path[:dot], import_path[dot+1:]
try:
mod = import_module(module)
except ImportError as e:
raise ImproperlyConfigured('Error importing storage module %s: "%s"' % (module, e))
try:
return getattr(mod, classname)
except AttributeError:
raise ImproperlyConfigured('Storage module "%s" does not define a "%s" class.' % (module, classname))