Easy way to set one VAR2 to be VAR1 when VAR2 not set via envvar

[patcon]

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I would like to find a proper way to set one variable to be another by default. I originally tried to do it like this:

class Base(Configuration):
    CITY_NAME = values.Value('Chicago')
    CITY_NAME_SHORT = values.Value(CITY_NAME)

This didn't work for reasons that are obvious to me now :)

Anyhow, this is how I'm currently doing it, but it still strikes me as messy:

class Base(Configuration):
    CITY_NAME = values.Value('Chicago')
    CITY_NAME_SHORT = values.Value('Chicago')

    @classmethod
    def setup(cls):
        default_city_short = cls.CITY_NAME_SHORT.value
        super().setup()
        if default_city_short == cls.CITY_NAME_SHORT:
            cls.CITY_NAME_SHORT = cls.CITY_NAME

Any thoughts on a better way? As it stands, it's perhaps clearer to handle it outside django-configurations, and just use os.environ...

Thanks!

[bittner]

I have a similar issue in #217. It would be cool if we had this usage pattern fixed. The simplicity of Django's settings module (w/o configurations) still has its obvious advantages. :worried: