django-pydantic-settings

Use pydantic settings management to simplify configuration of Django settings.

Very much a work in progress, but reads the standard DJANGO_SETTINGS_MODULE environment variable (defaulting to pydantic_settings.Settings) to load a sub-class of pydantic_settings.Settings. All settings (that have been defined in pydantic_settings.Settings) can be overridden with environment variables. A special DatabaseSettings class is used to allow multiple databases to be configured simply with DSNs.

Database configuration

By defining multiple DjangoDsn attributes of the DatabaseSettings class, you can easily configure one or more database connections with environment variables. DSNs are parsed using dj-database-url.

class DatabaseSettings(BaseSettings):
    default: DjangoDsn = Field(env="DATABASE_URL")
    secondary: DjangoDsn = Field(env="SECONDARY_DATABASE_URL")

❯ DATABASE_URL=sqlite:///foo SECONDARY_DATABASE_URL=sqlite:///bar ./settings_test/manage.py shell
Python 3.9.1 (default, Jan  8 2021, 17:17:43)
[Clang 12.0.0 (clang-1200.0.32.28)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from django.conf import settings
...
>>> pp.pprint(settings.DATABASES)
{   'default': {   'ATOMIC_REQUESTS': False,
                   'AUTOCOMMIT': True,
                   'CONN_MAX_AGE': 0,
                   'ENGINE': 'django.db.backends.sqlite3',
                   'HOST': '',
                   'NAME': 'foo',
                   'OPTIONS': {},
                   'PASSWORD': '',
                   'PORT': '',
                   'TEST': {   'CHARSET': None,
                               'COLLATION': None,
                               'MIGRATE': True,
                               'MIRROR': None,
                               'NAME': None},
                   'TIME_ZONE': None,
                   'USER': ''},
    'secondary': {   'CONN_MAX_AGE': 0,
                     'ENGINE': 'django.db.backends.sqlite3',
                     'HOST': '',
                     'NAME': 'bar',
                     'PASSWORD': '',
                     'PORT': '',
                     'USER': ''}}
>>>