Yesterday, I posted a new ticket asking about the potential for adding a
standardised approach for packages to define default settings. [0]
I was writing an app, and when looking for a way to set settings, there was
no clear solution.
Looking at what other projects do, the goto was something like this:
#myapp/settings.py
from django.conf import settings
MYAPP_SOME_SETTING = getattr(settings, 'MYAPP_SOME_SETTING', 'default')
This would then be accessed via myapp.settings, which will not reflect
dynamic updates (specifically, override_settings).
What I feel is needed is this:
- have apps access their settings via django.conf.settings, always
- Allow to define default settings as cleanly as it is for settings to be
written for projects.
- Allow for dynamic settings that are calculated by default, but can be
overridden by the project. [1]
- *Nice to have: *This should ideally be written as a DEP so that it's
usable on Django 1.11
*These are by no means final solutions. *I'm just looking to get the ball
rolling.
I'd like to propose a couple of solutions for this to discuss.
- First, Load default_settings.py during the setup sequence.
I'm not sure how feasible this would be. What order would the settings app
loads? what happens if your setting depends on another setting?
- Second, This could be done in AppConfig.
This introduces a fundamental new way of doing settings, and looks magical
when using it.
class MyAppConfig(AppConfig):
...
class DefaultSettings:
MYAPP_SOME_SETTINGS = 'default'
@property
def MYAPP_DYNAMIC_SETTING(self):
# set a default dynamically, based on environment or settings?
accessing settings.MYAPP_SOME_SETTINGS feels kind of strange though, as
there's no direct relation between this new class and the
django.conf.settings.
[0] https://code.djangoproject.com/ticket/27798
[1]
https://github.com/YPlan/nexus/blob/620efbb7d13100848346c45717ca63d01ec301e5/nexus/conf.py
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