274 lines
7.9 KiB
Python
274 lines
7.9 KiB
Python
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import os
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import time
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import warnings
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from asgiref.local import Local
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from django.apps import apps
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from django.core.exceptions import ImproperlyConfigured
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from django.core.signals import setting_changed
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from django.db import connections, router
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from django.db.utils import ConnectionRouter
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from django.dispatch import Signal, receiver
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from django.utils import timezone
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from django.utils.formats import FORMAT_SETTINGS, reset_format_cache
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from django.utils.functional import empty
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from django.utils.module_loading import import_string
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template_rendered = Signal()
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# Most setting_changed receivers are supposed to be added below,
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# except for cases where the receiver is related to a contrib app.
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# Settings that may not work well when using 'override_settings' (#19031)
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COMPLEX_OVERRIDE_SETTINGS = {"DATABASES"}
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@receiver(setting_changed)
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def clear_cache_handlers(*, setting, **kwargs):
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if setting == "CACHES":
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from django.core.cache import caches, close_caches
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close_caches()
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caches._settings = caches.settings = caches.configure_settings(None)
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caches._connections = Local()
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@receiver(setting_changed)
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def update_installed_apps(*, setting, **kwargs):
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if setting == "INSTALLED_APPS":
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# Rebuild any AppDirectoriesFinder instance.
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from django.contrib.staticfiles.finders import get_finder
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get_finder.cache_clear()
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# Rebuild management commands cache
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from django.core.management import get_commands
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get_commands.cache_clear()
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# Rebuild get_app_template_dirs cache.
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from django.template.utils import get_app_template_dirs
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get_app_template_dirs.cache_clear()
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# Rebuild translations cache.
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from django.utils.translation import trans_real
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trans_real._translations = {}
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@receiver(setting_changed)
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def update_connections_time_zone(*, setting, **kwargs):
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if setting == "TIME_ZONE":
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# Reset process time zone
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if hasattr(time, "tzset"):
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if kwargs["value"]:
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os.environ["TZ"] = kwargs["value"]
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else:
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os.environ.pop("TZ", None)
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time.tzset()
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# Reset local time zone cache
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timezone.get_default_timezone.cache_clear()
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# Reset the database connections' time zone
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if setting in {"TIME_ZONE", "USE_TZ"}:
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for conn in connections.all(initialized_only=True):
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try:
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del conn.timezone
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except AttributeError:
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pass
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try:
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del conn.timezone_name
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except AttributeError:
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pass
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conn.ensure_timezone()
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@receiver(setting_changed)
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def clear_routers_cache(*, setting, **kwargs):
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if setting == "DATABASE_ROUTERS":
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router.routers = ConnectionRouter().routers
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@receiver(setting_changed)
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def reset_template_engines(*, setting, **kwargs):
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if setting in {
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"TEMPLATES",
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"DEBUG",
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"INSTALLED_APPS",
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}:
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from django.template import engines
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try:
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del engines.templates
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except AttributeError:
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pass
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engines._templates = None
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engines._engines = {}
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from django.template.engine import Engine
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Engine.get_default.cache_clear()
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from django.forms.renderers import get_default_renderer
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get_default_renderer.cache_clear()
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@receiver(setting_changed)
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def storages_changed(*, setting, **kwargs):
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from django.contrib.staticfiles.storage import staticfiles_storage
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from django.core.files.storage import default_storage, storages
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if setting in (
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"STORAGES",
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"STATIC_ROOT",
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"STATIC_URL",
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):
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try:
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del storages.backends
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except AttributeError:
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pass
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storages._backends = None
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storages._storages = {}
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default_storage._wrapped = empty
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staticfiles_storage._wrapped = empty
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@receiver(setting_changed)
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def clear_serializers_cache(*, setting, **kwargs):
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if setting == "SERIALIZATION_MODULES":
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from django.core import serializers
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serializers._serializers = {}
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@receiver(setting_changed)
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def language_changed(*, setting, **kwargs):
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if setting in {"LANGUAGES", "LANGUAGE_CODE", "LOCALE_PATHS"}:
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from django.utils.translation import trans_real
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trans_real._default = None
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trans_real._active = Local()
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if setting in {"LANGUAGES", "LOCALE_PATHS"}:
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from django.utils.translation import trans_real
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trans_real._translations = {}
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trans_real.check_for_language.cache_clear()
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@receiver(setting_changed)
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def localize_settings_changed(*, setting, **kwargs):
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if setting in FORMAT_SETTINGS or setting == "USE_THOUSAND_SEPARATOR":
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reset_format_cache()
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# RemovedInDjango51Warning.
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@receiver(setting_changed)
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def file_storage_changed(*, setting, **kwargs):
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if setting == "DEFAULT_FILE_STORAGE":
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from django.conf import DEFAULT_STORAGE_ALIAS
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from django.core.files.storage import default_storage, storages
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try:
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del storages.backends
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except AttributeError:
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pass
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storages._storages[DEFAULT_STORAGE_ALIAS] = import_string(kwargs["value"])()
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default_storage._wrapped = empty
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@receiver(setting_changed)
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def complex_setting_changed(*, enter, setting, **kwargs):
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if enter and setting in COMPLEX_OVERRIDE_SETTINGS:
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# Considering the current implementation of the signals framework,
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# this stacklevel shows the line containing the override_settings call.
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warnings.warn(
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f"Overriding setting {setting} can lead to unexpected behavior.",
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stacklevel=6,
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)
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@receiver(setting_changed)
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def root_urlconf_changed(*, setting, **kwargs):
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if setting == "ROOT_URLCONF":
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from django.urls import clear_url_caches, set_urlconf
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clear_url_caches()
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set_urlconf(None)
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@receiver(setting_changed)
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def static_storage_changed(*, setting, **kwargs):
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if setting in {
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"STATICFILES_STORAGE",
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"STATIC_ROOT",
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"STATIC_URL",
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}:
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from django.contrib.staticfiles.storage import staticfiles_storage
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staticfiles_storage._wrapped = empty
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# RemovedInDjango51Warning.
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if setting == "STATICFILES_STORAGE":
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from django.conf import STATICFILES_STORAGE_ALIAS
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from django.core.files.storage import storages
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try:
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del storages.backends
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except AttributeError:
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pass
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storages._storages[STATICFILES_STORAGE_ALIAS] = import_string(kwargs["value"])()
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@receiver(setting_changed)
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def static_finders_changed(*, setting, **kwargs):
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if setting in {
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"STATICFILES_DIRS",
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"STATIC_ROOT",
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}:
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from django.contrib.staticfiles.finders import get_finder
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get_finder.cache_clear()
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@receiver(setting_changed)
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def auth_password_validators_changed(*, setting, **kwargs):
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if setting == "AUTH_PASSWORD_VALIDATORS":
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from django.contrib.auth.password_validation import (
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get_default_password_validators,
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)
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get_default_password_validators.cache_clear()
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@receiver(setting_changed)
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def user_model_swapped(*, setting, **kwargs):
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if setting == "AUTH_USER_MODEL":
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apps.clear_cache()
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try:
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from django.contrib.auth import get_user_model
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UserModel = get_user_model()
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except ImproperlyConfigured:
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# Some tests set an invalid AUTH_USER_MODEL.
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pass
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else:
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from django.contrib.auth import backends
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backends.UserModel = UserModel
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from django.contrib.auth import forms
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forms.UserModel = UserModel
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from django.contrib.auth.handlers import modwsgi
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modwsgi.UserModel = UserModel
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from django.contrib.auth.management.commands import changepassword
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changepassword.UserModel = UserModel
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from django.contrib.auth import views
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views.UserModel = UserModel
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