Django 3 Web Development Cookbook - Fourth Edition

How to do it...

To use the system-check framework, go through these steps:

1. Create the checks.py file with the following content:

# myproject/apps/viral_videos/checks.pyfrom textwrap import dedentfrom django.core.checks import Warning, register, Tags@register(Tags.compatibility)def settings_check(app_configs, **kwargs):    from django.conf import settings    errors = []    if not settings.ADMINS:        errors.append(            Warning(                dedent("""                    The system admins are not set in the project                      settings                """),                obj=settings,                hint=dedent("""                    In order to receive notifications when new                      videos are created, define system admins                      in your settings, like:                            ADMINS = (                        ("Admin", "[e-mail]"),                    )                """),                id="viral_videos.W001",            )        )    return errors

2. Import the checks ...