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Simple helper class to handle dict style settings for django app

Project description

This is small helper that makes it easier to store distributable django app settings in project settings.py as a dict. Purpose is to keep settings file simple and clean. With this it’s also easier to set defaults for the settings and warn about settings that have been removed.

Helper also supports marking settings that should be imported before returning. Import is done using django.utils.module_loading.import_string.

Helper resolves variables when requested for the first time and caches the value for faster lookup next time. Variables that are not in required or defaults raise AttributeError. If you like to clear the cache, you can use _clear_cached(), though there shouldn’t be need for that as the helper automatically does it if the setting changes.

Design is based on class done in Django REST framework.

Example

Setting defitions in your applications app_settings.py (for example):

from django_settingsdict import SettingsDict
REQUIRED = (
    'IMPORTANT_SETTING',
)
DEFAULTS = {
    'URL_NAME': 'test_app',
    'REVERSE_FUNC': 'django.core.urlresolvers.reverse',
}
IMPORT_STRINGS = (
    'REVERSE_FUNC',
)
REMOVED = (
    'OLD_SETTING',
)
app_settings = SettingsDict('MY_APP',
                            required=REQUIRED,
                            defaults=DEFAULTS,
                            removed=REMOVED,
                            import_strings=IMPORT_STRINGS)

Configuration in your projects settings.py:

MY_APP = {
    'IMPORTANT_SETTING': 'some value',
    'URL_NAME': 'test_app_2',
}

And in your application code:

from .app_settings import app_settings

print(app_settings.IMPORTANT_SETTING)
print(app_settings.URL_NAME)
print(app_settings.REVERSE_FUNC)

would make following result:

some value
test_app_2
<function reverse at 0x7fd5119e0578>

Project details


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