Django Unchained — Advanced Django Topics

Last reviewed: 2026-05-29

Django Unchained covers advanced Django patterns, production techniques, and deep dives beyond the basic getting-started material. For developers who already know the fundamentals and want to level up.

Overview

This training module focuses on the techniques that separate beginner Django projects from production-grade applications: clean architecture, database optimization, custom management commands, signals, middleware, caching strategies, background tasks, testing patterns, and deployment hardening.

Training Content

Django design patterns (Service layer, Repository pattern)
Query optimization (select_related, prefetch_related, Q objects, annotations)
Custom user models and authentication backends
Django signals and custom signal dispatch
Middleware hooks (process_request, process_response, process_exception)
Management commands (BaseCommand, custom arguments)
Caching strategies (Redis, Memcached, per-view, per-template)
Celery + Redis for background task processing
Testing: factories (factory_boy), fixtures, mock, pytest-django
Performance profiling with django-silk
Security hardening: headers, content security policy, rate limiting

Advanced Topics

Service Layer Pattern

Instead of putting business logic in views, extract it to service classes:

# services/order_service.py
class OrderService:
    @staticmethod
    def create_order(user, items):
        # Business logic: validate stock, process payment
        # Save to database
        # Send confirmation email
        pass

Query Optimization

# Bad: N+1 queries
for order in Order.objects.all():
    print(order.customer.name)  # Hits DB each iteration

# Good: One query
for order in Order.objects.select_related('customer').all():
    print(order.customer.name)

# Good: Many-to-many prefetch
for author in Author.objects.prefetch_related('books').all():
    print(author.books.count())

Custom Management Commands

# management/commands/cleanup_expired_sessions.py
from django.core.management.base import BaseCommand

class Command(BaseCommand):
    help = 'Removes expired sessions'

    def handle(self, *args, **options):
        from django.contrib.sessions.models import Session
        Session.objects.filter(expire_date__lt=timezone.now()).delete()
        self.stdout.write(self.style.SUCCESS('Expired sessions cleaned'))

Production Checklist

[ ] DEBUG = False
[ ] Secret key via environment variable
[ ] ALLOWED_HOSTS configured
[ ] Database connection pooling (PgBouncer)
[ ] Caching layer (Redis)
[ ] Static files served via CDN or Nginx
[ ] Media files stored on S3/cloud storage
[ ] HTTPS enforced (SECURE_SSL_REDIRECT)
[ ] Security headers (CSP, HSTS, X-Frame-Options)
[ ] Database migrations automated
[ ] Celery for background tasks
[ ] Sentry or similar for error tracking
[ ] CI/CD pipeline with automated tests
[ ] Logging and monitoring
[ ] Regular database backups