FastAPI

FastAPI Introduction — Why FastAPI?

First App — FastAPI + Uvicorn in Ten Lines

Path & Query Parameters — Typed and Validated

Request Body — Pydantic Models In

Response Models & Status Codes — Shaping What Goes Out

Auto Docs — Swagger UI, ReDoc & OpenAPI

Validation Deep Dive — Field, field_validator & model_validator

Nested Models — Real-World Payloads

Forms & File Uploads — multipart/form-data

Headers, Cookies & the Request Object

APIRouter — Splitting the App into Modules

Error Handling — Custom Exceptions & Handlers

Settings & Configuration — pydantic-settings and .env

Depends — Dependency Injection Basics

Dependencies with yield & Classes — Setup and Teardown

DI Patterns — Auth Chains, Router Guards & Test Overrides

SQLAlchemy Setup — Engine, Sessions & Models

CRUD with SQLAlchemy — The Full Resource Pattern

Alembic Migrations — Evolving the Schema Safely

Async SQLAlchemy — asyncpg and AsyncSession

Pagination, Filtering & Sorting — List Endpoints Done Right

OAuth2 Password Flow — Login That Issues Tokens

Password Hashing — bcrypt/Argon2 Done Right

JWT — Creating and Verifying Tokens

RBAC & Scopes — Roles, Permissions, Ownership

Middleware — Code Around Every Request

CORS — Letting Browsers Call Your API

Lifespan — Startup & Shutdown Done Properly

async def vs def — How FastAPI Runs Your Endpoints

Calling External APIs — httpx.AsyncClient Patterns

Caching — Redis, TTLs & Invalidation

BackgroundTasks — Work After the Response

WebSockets — Real-Time, Two-Way Connections

Streaming & SSE — Pushing Data as It Happens

TestClient — Testing Endpoints with pytest

Test Fixtures & Overrides — Real Tests, Fake Infrastructure

Async Tests — pytest-asyncio & AsyncClient

Servers & Workers — Running FastAPI in Production

Dockerizing FastAPI — Images Done Right

Production Checklist — Logging, Monitoring & Hardening