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- import os
- import time
- import warnings
-
- from asgiref.local import Local
-
- from django.apps import apps
- from django.core.exceptions import ImproperlyConfigured
- from django.core.signals import setting_changed
- from django.db import connections, router
- from django.db.utils import ConnectionRouter
- from django.dispatch import Signal, receiver
- from django.utils import timezone
- from django.utils.formats import FORMAT_SETTINGS, reset_format_cache
- from django.utils.functional import empty
-
- template_rendered = Signal()
-
- # Most setting_changed receivers are supposed to be added below,
- # except for cases where the receiver is related to a contrib app.
-
- # Settings that may not work well when using 'override_settings' (#19031)
- COMPLEX_OVERRIDE_SETTINGS = {"DATABASES"}
-
-
- @receiver(setting_changed)
- def clear_cache_handlers(*, setting, **kwargs):
- if setting == "CACHES":
- from django.core.cache import caches, close_caches
-
- close_caches()
- caches._settings = caches.settings = caches.configure_settings(None)
- caches._connections = Local()
-
-
- @receiver(setting_changed)
- def update_installed_apps(*, setting, **kwargs):
- if setting == "INSTALLED_APPS":
- # Rebuild any AppDirectoriesFinder instance.
- from django.contrib.staticfiles.finders import get_finder
-
- get_finder.cache_clear()
- # Rebuild management commands cache
- from django.core.management import get_commands
-
- get_commands.cache_clear()
- # Rebuild get_app_template_dirs cache.
- from django.template.utils import get_app_template_dirs
-
- get_app_template_dirs.cache_clear()
- # Rebuild translations cache.
- from django.utils.translation import trans_real
-
- trans_real._translations = {}
-
-
- @receiver(setting_changed)
- def update_connections_time_zone(*, setting, **kwargs):
- if setting == "TIME_ZONE":
- # Reset process time zone
- if hasattr(time, "tzset"):
- if kwargs["value"]:
- os.environ["TZ"] = kwargs["value"]
- else:
- os.environ.pop("TZ", None)
- time.tzset()
-
- # Reset local time zone cache
- timezone.get_default_timezone.cache_clear()
-
- # Reset the database connections' time zone
- if setting in {"TIME_ZONE", "USE_TZ"}:
- for conn in connections.all(initialized_only=True):
- try:
- del conn.timezone
- except AttributeError:
- pass
- try:
- del conn.timezone_name
- except AttributeError:
- pass
- conn.ensure_timezone()
-
-
- @receiver(setting_changed)
- def clear_routers_cache(*, setting, **kwargs):
- if setting == "DATABASE_ROUTERS":
- router.routers = ConnectionRouter().routers
-
-
- @receiver(setting_changed)
- def reset_template_engines(*, setting, **kwargs):
- if setting in {
- "TEMPLATES",
- "DEBUG",
- "INSTALLED_APPS",
- }:
- from django.template import engines
-
- try:
- del engines.templates
- except AttributeError:
- pass
- engines._templates = None
- engines._engines = {}
- from django.template.engine import Engine
-
- Engine.get_default.cache_clear()
- from django.forms.renderers import get_default_renderer
-
- get_default_renderer.cache_clear()
-
-
- @receiver(setting_changed)
- def clear_serializers_cache(*, setting, **kwargs):
- if setting == "SERIALIZATION_MODULES":
- from django.core import serializers
-
- serializers._serializers = {}
-
-
- @receiver(setting_changed)
- def language_changed(*, setting, **kwargs):
- if setting in {"LANGUAGES", "LANGUAGE_CODE", "LOCALE_PATHS"}:
- from django.utils.translation import trans_real
-
- trans_real._default = None
- trans_real._active = Local()
- if setting in {"LANGUAGES", "LOCALE_PATHS"}:
- from django.utils.translation import trans_real
-
- trans_real._translations = {}
- trans_real.check_for_language.cache_clear()
-
-
- @receiver(setting_changed)
- def localize_settings_changed(*, setting, **kwargs):
- if setting in FORMAT_SETTINGS or setting == "USE_THOUSAND_SEPARATOR":
- reset_format_cache()
-
-
- @receiver(setting_changed)
- def file_storage_changed(*, setting, **kwargs):
- if setting == "DEFAULT_FILE_STORAGE":
- from django.core.files.storage import default_storage
-
- default_storage._wrapped = empty
-
-
- @receiver(setting_changed)
- def complex_setting_changed(*, enter, setting, **kwargs):
- if enter and setting in COMPLEX_OVERRIDE_SETTINGS:
- # Considering the current implementation of the signals framework,
- # this stacklevel shows the line containing the override_settings call.
- warnings.warn(
- f"Overriding setting {setting} can lead to unexpected behavior.",
- stacklevel=6,
- )
-
-
- @receiver(setting_changed)
- def root_urlconf_changed(*, setting, **kwargs):
- if setting == "ROOT_URLCONF":
- from django.urls import clear_url_caches, set_urlconf
-
- clear_url_caches()
- set_urlconf(None)
-
-
- @receiver(setting_changed)
- def static_storage_changed(*, setting, **kwargs):
- if setting in {
- "STATICFILES_STORAGE",
- "STATIC_ROOT",
- "STATIC_URL",
- }:
- from django.contrib.staticfiles.storage import staticfiles_storage
-
- staticfiles_storage._wrapped = empty
-
-
- @receiver(setting_changed)
- def static_finders_changed(*, setting, **kwargs):
- if setting in {
- "STATICFILES_DIRS",
- "STATIC_ROOT",
- }:
- from django.contrib.staticfiles.finders import get_finder
-
- get_finder.cache_clear()
-
-
- @receiver(setting_changed)
- def auth_password_validators_changed(*, setting, **kwargs):
- if setting == "AUTH_PASSWORD_VALIDATORS":
- from django.contrib.auth.password_validation import (
- get_default_password_validators,
- )
-
- get_default_password_validators.cache_clear()
-
-
- @receiver(setting_changed)
- def user_model_swapped(*, setting, **kwargs):
- if setting == "AUTH_USER_MODEL":
- apps.clear_cache()
- try:
- from django.contrib.auth import get_user_model
-
- UserModel = get_user_model()
- except ImproperlyConfigured:
- # Some tests set an invalid AUTH_USER_MODEL.
- pass
- else:
- from django.contrib.auth import backends
-
- backends.UserModel = UserModel
-
- from django.contrib.auth import forms
-
- forms.UserModel = UserModel
-
- from django.contrib.auth.handlers import modwsgi
-
- modwsgi.UserModel = UserModel
-
- from django.contrib.auth.management.commands import changepassword
-
- changepassword.UserModel = UserModel
-
- from django.contrib.auth import views
-
- views.UserModel = UserModel
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