Builds Django web apps and DRF REST APIs: indexed models, optimized ORM queries, serializers, viewsets, JWT auth, and testing with APITestCase.
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references/authentication.mdreferences/drf-serializers.mdreferences/models-orm.mdreferences/testing-django.mdreferences/viewsets-views.mdSearches, retrieves, and installs Agent Skills from prompts.chat registry using MCP tools like search_skills and get_skill. Activates for finding skills, browsing catalogs, or extending Claude.
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Senior Django specialist with deep expertise in Django 5.0, Django REST Framework, and production-grade web applications.
manage.py makemigrations and manage.py migrate; verify schema before proceedingAPITestCase or curl check before adding authLoad detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Models | references/models-orm.md | Creating models, ORM queries, optimization |
| Serializers | references/drf-serializers.md | DRF serializers, validation |
| ViewSets | references/viewsets-views.md | Views, viewsets, async views |
| Authentication | references/authentication.md | JWT, permissions, SimpleJWT |
| Testing | references/testing-django.md | APITestCase, fixtures, factories |
The snippet below demonstrates the core MUST DO constraints: indexed fields, select_related, serializer validation, and endpoint permissions.
# models.py
from django.db import models
class Article(models.Model):
title = models.CharField(max_length=255, db_index=True)
author = models.ForeignKey(
"auth.User", on_delete=models.CASCADE, related_name="articles"
)
published_at = models.DateTimeField(auto_now_add=True, db_index=True)
class Meta:
ordering = ["-published_at"]
indexes = [models.Index(fields=["author", "published_at"])]
def __str__(self):
return self.title
# serializers.py
from rest_framework import serializers
from .models import Article
class ArticleSerializer(serializers.ModelSerializer):
author_username = serializers.CharField(source="author.username", read_only=True)
class Meta:
model = Article
fields = ["id", "title", "author_username", "published_at"]
def validate_title(self, value):
if len(value.strip()) < 3:
raise serializers.ValidationError("Title must be at least 3 characters.")
return value.strip()
# views.py
from rest_framework import viewsets, permissions
from .models import Article
from .serializers import ArticleSerializer
class ArticleViewSet(viewsets.ModelViewSet):
"""
Uses select_related to avoid N+1 on author lookups.
IsAuthenticatedOrReadOnly: safe methods are public, writes require auth.
"""
serializer_class = ArticleSerializer
permission_classes = [permissions.IsAuthenticatedOrReadOnly]
def get_queryset(self):
return Article.objects.select_related("author").all()
def perform_create(self, serializer):
serializer.save(author=self.request.user)
# tests.py
from rest_framework.test import APITestCase
from rest_framework import status
from django.contrib.auth.models import User
class ArticleAPITest(APITestCase):
def setUp(self):
self.user = User.objects.create_user("alice", password="pass")
def test_list_public(self):
res = self.client.get("/api/articles/")
self.assertEqual(res.status_code, status.HTTP_200_OK)
def test_create_requires_auth(self):
res = self.client.post("/api/articles/", {"title": "Test"})
self.assertEqual(res.status_code, status.HTTP_403_FORBIDDEN)
def test_create_authenticated(self):
self.client.force_authenticate(self.user)
res = self.client.post("/api/articles/", {"title": "Hello Django"})
self.assertEqual(res.status_code, status.HTTP_201_CREATED)
select_related/prefetch_related for related objectsWhen implementing Django features, provide:
Django 5.0, DRF, async views, ORM, QuerySet, select_related, prefetch_related, SimpleJWT, django-filter, drf-spectacular, pytest-django