Django: Creating a Mixin for Reusable Model Fields
Abstract models still need to inherit from model.Model to work correctly:
class TrackingFieldsMixin(models.Model):Also instead of your active BooleanField I would add a deleted_on DateTimeField so you can record when the record was deleted. You can then just add properties on the instance to see if it's active:
@propertydef active(self): return self.deleted_on is Noneand in queries and/or a custom manager:
Blog.objects.filter(deleted_on__isnull=True)