Audit trail is a simple Django app to track the database changes and maintain history in any application. It also provide history for many_to_many fields, with ready admin page.

With django 3 supports.

1. Install django-model-audit:

   pip install django-audittrail

2. Add "audit_trail" to your INSTALLED_APPS:

   INSTALLED_APPS = [
           ...
          'audit_trail',
   ]

3. Add Middlewre:

   MIDDLEWARE = [
          ...
          'audit_trail.middleware.AuditMiddleware'
   ]

4. Run Migrate:

   python manage.py migrate

5. Add an AuditTrail and manager to model you want to create history:

   from audit_trail.history import AuditTrail, AuditManager
   class MyModel(models.Model):
       ...
   
       history = AuditTrail()
   
       objects = AuditManager.as_manager()
   
       class Meta:
           display_format = '{model_name.field_name}'

6. To add admin screen for audit simply inherit AuditTrailAdmin in your model admin:

   from audit_trail.admin import AuditTrailAdmin
   class MyModelAdmin(AuditTrailAdmin):
       ...

   Visit django model admin screen to get the history of particular model(Click on History button in that screen).

7. To get audit trail of many_to_many fields just send signal from your AppConfig class' ready method:

   from audit_trail.signals import audit_m2m_ready
   
   class MyappConfig(AppConfig):
       ...
       def ready(self):
           audit_m2m.ready.send(sender=self.__class__)
           ...

8. To get audit trail logs in your django app import and call function get_audit_trail() like this:

   from audit_trail.admin import get_audit_trail
   get_audit_trail(model_name, object_id)