access request object from models DRF

1. Add request_exposer.py file in middleware folder

2. Add in settings.py

MIDDLEWARE = [
    'appName.middlewares.request_exposer.RequestExposerMiddleware'
]

3. To add signals :

• Add signals.py file to the app folder
• Add this in init.py

default_app_config = "appName.apps.appNameConfig"

• Add this in apps.py

from django.apps import AppConfig


class appNameConfig(AppConfig):
    name = 'appName'
    def ready(self):
        import appName.signals