Fastapi on Manvendra Rajpoot https://blog.rajpoot.dev/categories/fastapi/ Recent content in Fastapi on Manvendra Rajpoot Manvendra Rajpoot https://blog.rajpoot.dev/img/personal/cover.png https://blog.rajpoot.dev/img/personal/cover.png Hugo en Manvendra Rajpoot Sun, 17 May 2026 17:50:46 +0530 FastAPI Cheatsheet 01 — Routing, Path Operations, and Routers https://blog.rajpoot.dev/cheatsheets/fastapi/01-routing-cheatsheet/ Mon, 11 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/01-routing-cheatsheet/ FastAPI routing cheatsheet — path operations, parameter sources, routers, prefixes, mounts, and the request lifecycle in one scannable page. FastAPI Textbook Ch. 1 — Introduction, Architecture, and the ASGI Foundation https://blog.rajpoot.dev/textbooks/fastapi/01-introduction-and-architecture/ Wed, 06 May 2026 06:00:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/01-introduction-and-architecture/ Chapter 1 of the FastAPI textbook — what FastAPI is, the ASGI foundation, Starlette underneath, and how the pieces fit. FastAPI Cheatsheet 02 — Pydantic Request Validation https://blog.rajpoot.dev/cheatsheets/fastapi/02-pydantic-validation-cheatsheet/ Mon, 11 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/02-pydantic-validation-cheatsheet/ FastAPI request validation cheatsheet — Pydantic v2 models, validators, error handling, recipes. FastAPI Textbook Ch. 2 — Routing, Path Operations, and the Request Anatomy https://blog.rajpoot.dev/textbooks/fastapi/02-routing-and-request-anatomy/ Wed, 06 May 2026 06:10:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/02-routing-and-request-anatomy/ Chapter 2 — FastAPI routing in depth: path operations, parameter sources, routers, mounts, and the request lifecycle. FastAPI Cheatsheet 03 — Response Models, Serialization, and Status Codes https://blog.rajpoot.dev/cheatsheets/fastapi/03-response-models-cheatsheet/ Mon, 11 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/03-response-models-cheatsheet/ FastAPI response cheatsheet — response_model, exclude, status codes, response classes, headers. FastAPI Textbook Ch. 3 — Pydantic Models and Request Validation https://blog.rajpoot.dev/textbooks/fastapi/03-pydantic-models-validation/ Wed, 06 May 2026 06:20:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/03-pydantic-models-validation/ Chapter 3 — Pydantic for FastAPI: input models, validators, types, custom errors, and how request bodies become typed Python objects. FastAPI Cheatsheet 04 — Dependency Injection https://blog.rajpoot.dev/cheatsheets/fastapi/04-dependency-injection-cheatsheet/ Mon, 11 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/04-dependency-injection-cheatsheet/ FastAPI DI cheatsheet — Depends, sub-deps, scopes, overrides, lifespan, security deps. FastAPI Textbook Ch. 4 — Response Models, Serialization, and Output Discipline https://blog.rajpoot.dev/textbooks/fastapi/04-response-models-serialization/ Wed, 06 May 2026 06:30:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/04-response-models-serialization/ Chapter 4 — Response models in FastAPI: response_model, exclusion, computed fields, custom encoders, and output discipline. FastAPI Cheatsheet 05 — Authentication and Authorization https://blog.rajpoot.dev/cheatsheets/fastapi/05-auth-cheatsheet/ Mon, 11 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/05-auth-cheatsheet/ FastAPI auth cheatsheet — password hashing, JWT, OAuth2 / OIDC, sessions, API keys, scopes, RBAC. FastAPI Textbook Ch. 5 — Dependency Injection in Depth https://blog.rajpoot.dev/textbooks/fastapi/05-dependency-injection/ Wed, 06 May 2026 06:40:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/05-dependency-injection/ Chapter 5 — FastAPI dependency injection: Depends, sub-dependencies, scopes, lifecycle, overrides, class deps, security deps, sync vs async. FastAPI Cheatsheet 06 — Async, Concurrency, and the Threadpool https://blog.rajpoot.dev/cheatsheets/fastapi/06-async-concurrency-cheatsheet/ Mon, 11 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/06-async-concurrency-cheatsheet/ FastAPI async / concurrency cheatsheet — async vs def handlers, threadpool, AnyIO, TaskGroup, blocking traps. FastAPI Textbook Ch. 6 — Authentication and Authorization https://blog.rajpoot.dev/textbooks/fastapi/06-authentication-authorization/ Wed, 06 May 2026 06:50:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/06-authentication-authorization/ Chapter 6 — FastAPI auth: OAuth2 password / bearer / OIDC, sessions, API keys, role-based access, and the production patterns. FastAPI Cheatsheet 07 — WebSockets and SSE https://blog.rajpoot.dev/cheatsheets/fastapi/07-websockets-sse-cheatsheet/ Mon, 11 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/07-websockets-sse-cheatsheet/ FastAPI WebSocket + SSE cheatsheet — handlers, auth, fanout, disconnect, multi-process. FastAPI Textbook Ch. 7 — Async, Concurrency, and the Threadpool https://blog.rajpoot.dev/textbooks/fastapi/07-async-concurrency/ Wed, 06 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/07-async-concurrency/ Chapter 7 — Async in FastAPI: event loop, threadpool, blocking traps, AnyIO, TaskGroup, and concurrency patterns. FastAPI Cheatsheet 08 — Background Tasks and Job Queues https://blog.rajpoot.dev/cheatsheets/fastapi/08-background-tasks-cheatsheet/ Mon, 11 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/08-background-tasks-cheatsheet/ FastAPI background work cheatsheet — BackgroundTasks, ARQ, Celery, Dramatiq integration. FastAPI Textbook Ch. 8 — WebSockets, SSE, and Streaming Responses https://blog.rajpoot.dev/textbooks/fastapi/08-websockets-sse-streaming/ Wed, 06 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/08-websockets-sse-streaming/ Chapter 8 — Real-time in FastAPI: WebSockets, Server-Sent Events, streaming responses, NDJSON, and client patterns. FastAPI Cheatsheet 09 — Testing with Pytest, AsyncClient, and testcontainers https://blog.rajpoot.dev/cheatsheets/fastapi/09-testing-cheatsheet/ Mon, 11 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/09-testing-cheatsheet/ FastAPI testing cheatsheet — TestClient, AsyncClient, dependency overrides, real DB tests, factories, CI. FastAPI Textbook Ch. 9 — Background Tasks and Task Queues https://blog.rajpoot.dev/textbooks/fastapi/09-background-tasks/ Wed, 06 May 2026 07:20:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/09-background-tasks/ Chapter 9 — Background work in FastAPI: BackgroundTasks, ARQ, Celery, Dramatiq, and patterns for reliable post-response work. FastAPI Cheatsheet 10 — Observability: structlog, OTEL, Prometheus https://blog.rajpoot.dev/cheatsheets/fastapi/10-observability-cheatsheet/ Mon, 11 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/10-observability-cheatsheet/ FastAPI observability cheatsheet — structlog, OpenTelemetry tracing, Prometheus metrics, correlation. FastAPI Textbook Ch. 10 — Testing FastAPI: Pytest, AnyIO, and Real DBs https://blog.rajpoot.dev/textbooks/fastapi/10-testing/ Wed, 06 May 2026 07:30:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/10-testing/ Chapter 10 — Testing FastAPI: TestClient, AsyncClient, dependency overrides, real DB tests, fixtures, and CI patterns. FastAPI Cheatsheet 11 — Docker, Kubernetes, and Deploy https://blog.rajpoot.dev/cheatsheets/fastapi/11-deployment-cheatsheet/ Mon, 11 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/11-deployment-cheatsheet/ FastAPI deploy cheatsheet — Dockerfile, Uvicorn, Kubernetes manifest, graceful shutdown, autoscaling. FastAPI Textbook Ch. 11 — Observability: Logging, Tracing, and Metrics https://blog.rajpoot.dev/textbooks/fastapi/11-observability/ Wed, 06 May 2026 07:40:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/11-observability/ Chapter 11 — Observability for FastAPI: structured logging with structlog, OpenTelemetry tracing, Prometheus metrics, and correlation. FastAPI Cheatsheet 12 — Middleware Patterns https://blog.rajpoot.dev/cheatsheets/fastapi/12-middleware-cheatsheet/ Mon, 11 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/12-middleware-cheatsheet/ FastAPI middleware cheatsheet — common patterns, ordering, ASGI middleware, custom logic. FastAPI Textbook Ch. 12 — Deployment, Scaling, and Production https://blog.rajpoot.dev/textbooks/fastapi/12-deployment-production/ Wed, 06 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/textbooks/fastapi/12-deployment-production/ Chapter 12 — Production FastAPI: ASGI servers, Docker, K8s, autoscaling, graceful shutdown, and the production checklist. FastAPI Cheatsheet 13 — OpenAPI, Swagger UI, and Schema Tweaks https://blog.rajpoot.dev/cheatsheets/fastapi/13-openapi-tweaks-cheatsheet/ Mon, 11 May 2026 08:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/13-openapi-tweaks-cheatsheet/ FastAPI OpenAPI cheatsheet — schema customization, Swagger UI tweaks, ReDoc, custom docs paths. FastAPI Cheatsheet 14 — Settings, Config, and Environments https://blog.rajpoot.dev/cheatsheets/fastapi/14-settings-config-cheatsheet/ Mon, 11 May 2026 08:10:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/14-settings-config-cheatsheet/ FastAPI config cheatsheet — pydantic-settings, env files, secrets, multi-environment patterns. FastAPI Cheatsheet 15 — Common Errors and How to Fix Them https://blog.rajpoot.dev/cheatsheets/fastapi/15-common-errors-cheatsheet/ Mon, 11 May 2026 08:20:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/15-common-errors-cheatsheet/ FastAPI common-errors cheatsheet — the recurring failures and quick fixes. FastAPI Cheatsheet 16 — Pagination Patterns https://blog.rajpoot.dev/cheatsheets/fastapi/16-pagination-patterns-cheatsheet/ Mon, 11 May 2026 08:30:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/16-pagination-patterns-cheatsheet/ FastAPI pagination cheatsheet — offset, cursor, keyset, opaque cursors, generic Page model. FastAPI Cheatsheet 17 — Caching: HTTP, Redis, fastapi-cache https://blog.rajpoot.dev/cheatsheets/fastapi/17-caching-patterns-cheatsheet/ Mon, 11 May 2026 08:40:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/17-caching-patterns-cheatsheet/ FastAPI caching cheatsheet — HTTP cache headers, Redis-backed caching, fastapi-cache library. FastAPI Cheatsheet 18 — Streaming and LLM Integration https://blog.rajpoot.dev/cheatsheets/fastapi/18-streaming-llm-cheatsheet/ Mon, 11 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/18-streaming-llm-cheatsheet/ FastAPI LLM streaming cheatsheet — Anthropic / OpenAI / vLLM streaming, tool calls, cancellation. FastAPI Cheatsheet 19 — Health, Probes, and Lifespan https://blog.rajpoot.dev/cheatsheets/fastapi/19-health-probes-cheatsheet/ Mon, 11 May 2026 09:00:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/19-health-probes-cheatsheet/ FastAPI health / readiness / probes cheatsheet — lifespan, dependency check endpoints, K8s integration. FastAPI Cheatsheet 20 — Production Checklist https://blog.rajpoot.dev/cheatsheets/fastapi/20-production-checklist-cheatsheet/ Mon, 11 May 2026 07:50:00 +0530 https://blog.rajpoot.dev/cheatsheets/fastapi/20-production-checklist-cheatsheet/ FastAPI production checklist — every box to tick before going live. FastAPI Dependency Injection in 2026 — Patterns That Scale Past Toy Apps https://blog.rajpoot.dev/posts/fastapi/fastapi-dependency-injection-2026/ Mon, 04 May 2026 08:50:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-dependency-injection-2026/ FastAPI dependency injection in 2026 — DB sessions, auth, caching deps, lifecycle, and patterns from production FastAPI apps. FastAPI Background Tasks in 2026 — BackgroundTasks, ARQ, and When to Reach for Celery https://blog.rajpoot.dev/posts/fastapi/fastapi-background-tasks-2026/ Sat, 02 May 2026 07:10:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-background-tasks-2026/ Background tasks in FastAPI 2026 — BackgroundTasks vs ARQ vs Celery vs Dramatiq. Patterns for short tasks, long jobs, and reliable processing. FastAPI Streaming and SSE in 2026 — Real-Time Without WebSockets https://blog.rajpoot.dev/posts/fastapi/fastapi-streaming-sse-2026/ Sat, 02 May 2026 07:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-streaming-sse-2026/ FastAPI streaming responses and Server-Sent Events in 2026 — async generators, SSE format, LLM streaming, and the production patterns. FastAPI + Pydantic v2 + SQLAlchemy 2.0 — Production Patterns for 2026 https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ Tue, 28 Apr 2026 17:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-pydantic-v2-sqlalchemy-2-production/ The FastAPI stack worth building on in 2026 — Pydantic v2, async SQLAlchemy 2.0, dependency injection, settings, errors, observability, and the layout that scales past one file. Django vs FastAPI: Which One Should You Pick in 2026? https://blog.rajpoot.dev/posts/django/django-vs-fastapi/ Tue, 28 Apr 2026 14:00:00 +0530 https://blog.rajpoot.dev/posts/django/django-vs-fastapi/ An honest, opinionated comparison of Django and FastAPI — what each is great at, what they're not, and how to decide which one fits your next project. Testing FastAPI Apps: From Pytest to Database Isolation https://blog.rajpoot.dev/posts/fastapi/testing-fastapi-apps/ Tue, 28 Apr 2026 13:55:00 +0530 https://blog.rajpoot.dev/posts/fastapi/testing-fastapi-apps/ How to test FastAPI applications properly — pytest setup, async test client, database isolation per test, fixtures for auth, and the patterns that scale. JWT Authentication in FastAPI: A Complete Walkthrough https://blog.rajpoot.dev/posts/fastapi/jwt-authentication-in-fastapi/ Tue, 28 Apr 2026 13:50:00 +0530 https://blog.rajpoot.dev/posts/fastapi/jwt-authentication-in-fastapi/ Build secure JWT authentication in FastAPI from scratch — password hashing, token issuing, refresh tokens, dependency-injected current user, and the security pitfalls to avoid. FastAPI + SQLAlchemy + PostgreSQL: A Modern Setup https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ Tue, 28 Apr 2026 13:45:00 +0530 https://blog.rajpoot.dev/posts/fastapi/fastapi-with-sqlalchemy/ A practical guide to wiring FastAPI to PostgreSQL with SQLAlchemy 2.0 (async), Alembic migrations, and a sane project structure. Getting Started with FastAPI: Modern Python APIs Done Right https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ Tue, 28 Apr 2026 11:00:00 +0530 https://blog.rajpoot.dev/posts/fastapi/getting-started-with-fastapi/ A practical introduction to FastAPI — the async Python framework that gives you type-safe APIs, automatic docs, and great performance with very little ceremony.