Django REST Framework (DRF) is a powerful and flexible third-party toolkit built on top of Django, designed specifically for building Web APIs (Application Programming Interfaces).
Standard Django returns HTML pages intended for human browsers. Modern web development often requires returning raw data (like JSON) so that a React frontend or a mobile app can consume it. DRF provides the tools to serialize Django models into JSON, handle API routing, and manage API authentication.
- Replaces Django Forms with Serializers (which convert QuerySets to JSON and validate incoming JSON).
- Replaces Django Views with APIViews or ViewSets.
- Provides Routers to automatically generate standard RESTful URLs.
- Manages content negotiation, parsing, and rendering automatically.
graph LR A[API Request JSON] --> B(API View) B --> C(Serializer Validation) C --> D[(Database)] D --> C C --> B(Serializer to JSON) B --> E[API Response JSON]
If standard Django is a restaurant that serves fully plated meals (HTML pages), DRF is a wholesale food supplier that just provides the raw, packaged ingredients (JSON data). The customer (React/Mobile App) takes those ingredients and cooks/presents the meal themselves.
from rest_framework import serializers, viewsets
from .models import User
# Serializer
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ['url', 'username', 'email']
# ViewSet
class UserViewSet(viewsets.ModelViewSet):
queryset = User.objects.all()
serializer_class = UserSerializer- Browsable API: Provides a web interface to interact with your API out of the box.
- Serializers: Complex data conversion.
- Extensible authentication (JWT, OAuth) and permissions.
- Built from: Django Web Framework — an extension of Django.
- Related: Django Model — Serializers map to models.
- Related: Django View — APIViews extend standard views.
- Related: Django Authentication System — DRF builds on Django’s auth for APIs.
- N+1 query problems are very common in DRF Serializers if
select_relatedis not used in the ViewSet queryset.