tuskar-ui/horizon/conf/__init__.py
Alexey Izbyshev 50c21151b5 Fix circular dependencies in dashboard settings
Importing horizon.utils from dashboard local_settings.py to generate
SECRET_KEY results in a sequence of imports, and horizon.conf.default
module gets imported at some point. During initialization of default
HORIZON_CONFIG this module uses settings.LOGIN_REDIRECT_URL and
ugettext() call. Both of them need django settings to be ready to use,
therefore settings initialization starts again before it could finish.

Since Python processes module only when it is imported the first time,
this process stops, but the 'inner' settings object contains only
parameters that were set above the point of import of local_settings.
Therefore Django complains about missing SECRET_KEY when it processes
'inner' settings.

The fix moves the import of horizon.conf.default to
LazySetting._setup(). If keys of HORIZON_CONFIG obtained from
horizon.conf are not used within openstask_dashboard settings.py
or local_settings.py, the circular import won't happen.

Fixes bug #1154564

Change-Id: If63ab1920ecc8e646fd5b6cc52c106ae0876fa2d
2013-03-13 16:18:00 +04:00

35 lines
1.4 KiB
Python

import copy
from django.utils.functional import LazyObject, empty
class LazySettings(LazyObject):
def _setup(self, name=None):
from django.conf import settings
from .default import HORIZON_CONFIG as DEFAULT_CONFIG
HORIZON_CONFIG = copy.copy(DEFAULT_CONFIG)
HORIZON_CONFIG.update(settings.HORIZON_CONFIG)
# Ensure we always have our exception configuration...
for exc_category in ['unauthorized', 'not_found', 'recoverable']:
if exc_category not in HORIZON_CONFIG['exceptions']:
default_exc_config = DEFAULT_CONFIG['exceptions'][exc_category]
HORIZON_CONFIG['exceptions'][exc_category] = default_exc_config
# Ensure our password validator always exists...
if 'regex' not in HORIZON_CONFIG['password_validator']:
default_pw_regex = DEFAULT_CONFIG['password_validator']['regex']
HORIZON_CONFIG['password_validator']['regex'] = default_pw_regex
if 'help_text' not in HORIZON_CONFIG['password_validator']:
default_pw_help = DEFAULT_CONFIG['password_validator']['help_text']
HORIZON_CONFIG['password_validator']['help_text'] = default_pw_help
self._wrapped = HORIZON_CONFIG
def __getitem__(self, name, fallback=None):
if self._wrapped is empty:
self._setup(name)
return self._wrapped.get(name, fallback)
HORIZON_CONFIG = LazySettings()