Utility script which switches the django settings module. Usage: setup_django_settings('myproject.settings')

django_settings.py

import os
import sys

from django.utils.importlib import import_module
from django.core.urlresolvers import clear_url_caches
from django.template import context, base, loader
from django.utils import translation
from django.utils.translation import trans_real


def setup_django_settings(test_settings):
    """Override the enviroment variable and call the _setup method of the settings object to reload them."""
    os.environ['DJANGO_SETTINGS_MODULE'] = test_settings

    from django.conf import settings as django_settings

    if test_settings:
        # reload settings
        reload_settings(django_settings)
    else:
        # just settings cleanup, no reload
        django_settings._wrapped = None


def reload_settings(settings):
    """Special routine to reload django settings, including:
    urlconf module, context processor, templatetags settings, database settings.
    This also includes re-setting up sqlalchemy database settings. Environment chosen is always TestEnv."""

    # resetup django settings
    settings._setup()

    # check if there's settings to reload
    if hasattr(settings, 'ROOT_URLCONF'):
        if settings.ROOT_URLCONF in sys.modules:
            reload(sys.modules[settings.ROOT_URLCONF])
        import_module(settings.ROOT_URLCONF)
        settings.LANGUAGE_CODE = 'en'  # all tests should be run with English by default

        # Make the ConnectionHandler use the new settings, otherwise the ConnectionHandler will have old configuraton.
        from django.db.utils import ConnectionHandler
        import django.db
        from django.db.utils import load_backend
        import django.db.transaction
        import django.db.models
        import django.db.models.sql.query
        import django.core.management.commands.syncdb
        import django.db.models.sql.compiler
        import django.db.backends
        import django.db.backends.mysql.base
        import django.core.management.commands.loaddata

        # all modules which imported django.db.connections should be changed to get new ConnectionHanlder
        django.db.models.sql.compiler.connections = django.db.models.connections = \
            django.core.management.commands.loaddata.connections = \
            django.db.backends.connections = django.db.backends.mysql.base.connections = \
            django.core.management.commands.syncdb.connections = django.db.transaction.connections = \
            django.db.connections = django.db.models.base.connections = django.db.models.sql.query.connections = \
            ConnectionHandler(settings.DATABASES)

        # default django connection and backend should be also changed
        django.db.connection = django.db.connections[django.db.DEFAULT_DB_ALIAS]
        django.db.backend = load_backend(django.db.connection.settings_dict['ENGINE'])

        # reporting database settings
        from paylogic.privates import reporting_readslave
        backend = load_backend('django.db.backends.' + reporting_readslave.REPORTING_ENGINE)
        reporting_readslave.READ_CONNECTION = 'readslave'
        django.db.connections._connections[reporting_readslave.READ_CONNECTION] = backend.DatabaseWrapper({
            'HOST': reporting_readslave.REPORTING_HOST,
            'NAME': reporting_readslave.REPORTING_NAME,
            'PASSWORD': reporting_readslave.REPORTING_PASSWORD,
            'OPTIONS': '',
            'PORT': reporting_readslave.REPORTING_PORT,
            'USER': reporting_readslave.REPORTING_USER,
            'TIME_ZONE': settings.TIME_ZONE,
        })

        import django.core.cache
        django.core.cache.cache = django.core.cache.get_cache(django.core.cache.DEFAULT_CACHE_ALIAS)

        # clear django urls cache
        clear_url_caches()
        # clear django contextprocessors cache
        context._standard_context_processors = None
        # clear django templatetags cache
        base.templatetags_modules = None

        # reload translation files
        reload(translation)
        reload(trans_real)

        # clear django template loaders cache
        loader.template_source_loaders = None
        from django.template.loaders import app_directories
        reload(app_directories)

Hi dude!,
Do you have an update of this script but for django 1.11 ?

I need to change my default DATABASE live :D.

Thanks in advance