3.18 - It looks like this has broken integration with environment variables.

@rochacbruno @jyejare It looks like this has broken integration with environment variables.

If I have dynaconf 3.1.8 installed, and the combination of:

1. settings.yaml field key (nested one level from top map) is present, value is empty
2. validator with default=None for given field key
3. envvar set for nested field key (DYNACONF_something__field_key)
4. settings object configuration that looks like: https://github.com/SatelliteQE/robottelo/blob/master/robottelo/config/__init__.py#L18

My envvar value is no longer set in the resulting box instance, it takes the validator default of None.

I confirmed its this line in particular by modifying the file in site-packages with 3.1.8 installed.

_Originally posted by @mshriver in https://github.com/rochacbruno/dynaconf/pull/729#discussion_r853220515_

[jmwielandt]

Hi, I’ve written some tests using pytest for this issue which could be added to https://github.com/rochacbruno/dynaconf/blob/master/tests/test_validators.py.

import os
from dynaconf import Dynaconf, Validator


def test_default_eq_env_lvl_1():
    """Tests when the env value equals the default value."""
    VAR_NAME = "test"
    ENV = "TEST"
    settings = Dynaconf(
        environments=False,
        envvar_prefix=False,
        validators=[
            Validator(
                VAR_NAME,
                default=True,
                is_type_of=bool,
            ),
        ],
    )
    os.environ[ENV] = "true"
    assert settings.test is True
    del os.environ[ENV]


def test_default_lvl_1():
    """Tests if the default works propperly without any nested level.

    Uses different values for the default and the environment variable.
    """
    VAR_NAME = "test"
    ENV = "TEST"
    settings = Dynaconf(
        environments=False,
        envvar_prefix=False,
        validators=[
            Validator(
                VAR_NAME,
                default=True,
                is_type_of=bool,
            ),
        ],
    )
    os.environ[ENV] = "false"
    assert settings.test is False
    del os.environ[ENV]


def test_default_lvl_2():
    """Tests if the default works propperly with one nested level.

    Uses different values for the default and the environment variable.
    """
    VAR_NAME = "nested.test"
    ENV = "NESTED__TEST"
    settings = Dynaconf(
        environments=False,
        envvar_prefix=False,
        validators=[
            Validator(
                VAR_NAME,
                default=True,
                is_type_of=bool,
            ),
        ],
    )
    os.environ[ENV] = "false"
    assert settings.nested.test is False
    del os.environ[ENV]

Again: dynaconf 3.1.7 works fine, but dynaconf 3.1.8 don’t.

[rochacbruno]

@mshriver tracking on this issue, so we can try to fix for both use cases and release 3.1.9 ASAP