blog details

• Django
• January 25, 2026

How to Build a Django REST API from Scratch: Step-by-Step Tutorial 2026

Build a production-ready Django REST API from zero to deployed in this step-by-step guide. Includes models, serializers, JWT auth, filtering, and deployment.

What You'll Build in This Tutorial

By the end of this guide, you'll have a fully functional Django REST API with: user registration and JWT authentication, a protected API endpoint that returns data based on the authenticated user, filtering and search capabilities, pagination, and a deployment-ready project structure. We'll build a simple task management API — the patterns apply to any domain. Let's start from zero.

Step 1: Project Setup and Dependencies

Create a virtual environment, install your dependencies, and generate your project scaffold. Use environment variables for all secrets from day one — never hardcode passwords or API keys.

python -m venv venv && source venv/bin/activate

pip install django djangorestframework djangorestframework-simplejwt             django-filter django-cors-headers psycopg2-binary python-decouple



django-admin startproject taskapi .

python manage.py startapp tasks

Step 2: Define Your Models

Design your database schema through Django models. Use proper field types, add __str__ methods for admin readability, and index fields you'll query frequently (ForeignKey fields are auto-indexed; add db_index=True to other filtered fields).

# tasks/models.py

from django.db import models

from django.contrib.auth.models import User



class Task(models.Model):

    PRIORITY = [('low','Low'),('medium','Medium'),('high','High')]

    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='tasks')

    title = models.CharField(max_length=200)

    description = models.TextField(blank=True)

    priority = models.CharField(max_length=10, choices=PRIORITY, default='medium')

    completed = models.BooleanField(default=False)

    created_at = models.DateTimeField(auto_now_add=True)

    updated_at = models.DateTimeField(auto_now=True)

    

    class Meta:

        ordering = ['-created_at']

        indexes = [models.Index(fields=['user', 'completed'])]

    

    def __str__(self):

        return f"{self.user.username}: {self.title}"

Step 3: Serializers, ViewSets, and Authentication

Create your serializer with proper validation, your ViewSet with user-scoped queryset (users should only see their own tasks), add JWT endpoints to your URL configuration, and configure CORS for your frontend domain. The most critical security rule: always filter querysets by the authenticated user — never return data that doesn't belong to the requesting user.

• Override get_queryset() to filter by request.user — never trust client-submitted user IDs
• Use perform_create() to auto-assign user from request rather than requiring it in payload
• Add django-filter for ?completed=true and ?priority=high query parameter filtering
• Write APITestCase tests for every endpoint before considering the API production-ready

Step 4: Deployment to Production

A Django API needs: DEBUG=False in production, a proper SECRET_KEY from environment variables (not hardcoded), ALLOWED_HOSTS set to your domain, static files served via WhiteNoise or S3, a production WSGI server (Gunicorn), and a reverse proxy (Nginx). For simple APIs, Railway or Render offer one-click Django deployment. For production workloads, DigitalOcean App Platform or AWS Elastic Beanstalk with RDS PostgreSQL is the standard stack.

Need a production Django REST API built for your business? My Python and Django development service covers full API development from models to deployment. I also specialize in AI-powered API backends that integrate with LLM services. Get in touch to discuss your project.