Simple Django super class to track user and save creator and modifier of a Model.

middleware.py

from myapp.utils import set_current_user


class CurrentUserMiddleware:
    def process_request(self, request):
        set_current_user(getattr(request, 'user', None))

models.py

from django.db import models
from django.contrib.auth.models import User

from myapp.utils import get_current_user


class FollowUserModel(models.Model):
    created_at = models.ForeignKey(auto_now_add=True)
    modified_at = models.ForeignKey(auto_now=True)
    created_by = models.ForeignKey(User, null=True, editable=False, related_name='%(class)s_created')
    modified_by = models.ForeignKey(User, null=True, editable=False, related_name='%(class)s_modified')

    def save(self, *args, **kwargs):
        user = get_current_user()
        if user and user.is_authenticated():
            self.modified_by = user
            if not self.id:
                self.created_by = user
        super(FollowUserModel, self).save(*args, **kwargs)

    class Meta:
        abstract = True

settings.py

MIDDLEWARE_CLASSES = (
    # ...
    'myapp.middleware.CurrentUserMiddleware',
)

utils.py

import threading


_thread_locals = threading.local()

def set_current_user(user):
    _thread_locals.user=user

def get_current_user():
    return getattr(_thread_locals, 'user', None)