how to ensure that runtime changes to configuration are preserved?

[chicco785]

Hi

I have the following scenario, and I am a bit blocked....

I have a container that I use to load all configurations Configuration, and to ensure that, when changes are applied to any configuration, the same configuration is used, I nested it inside another Container using a singleton provider :

import logging

import dependency_injector.containers as containers
import dependency_injector.providers as providers


class Configuration(containers.DeclarativeContainer):
    config = providers.Configuration()
    config.query_cache.enabled.from_env("CACHE_QUERIES", required=False,
                                        default=False)

class Core(containers.DeclarativeContainer):
    configuration = providers.ThreadSafeSingleton(Configuration)

Unfortunately, as experimented with this test case, any change to the configuration values is done, it's lost when calling Core and retrieving the configuration:

import pytest
from utils.config import Core


@pytest.fixture(scope="session")
def enable_caching():
    config = Core().configuration().config
    config.query_cache.enabled.from_value(True)
    yield
    config.query_cache.enabled.from_value(False)


def test_configuration(enable_caching):
    config = Core().configuration().config
    assert config.query_cache.enabled() == True # value is still False, like no from_value was applied...