FastAPI Tutorial: A Complete Guide
A comprehensive guide to building modern web APIs with FastAPI — from Hello World to deployment. Covers path/query parameters, Pydantic models, SQL/MongoDB databases, WebSockets, GraphQL, middleware, and production deployment. Each chapter includes explanations, code samples, SVGs, and practice exercises.
Table of Contents
- 1. Home Course overview, prerequisite, setup
- 2. Introduction What is FastAPI, why use it, comparison with Flask/Django
- 3. Hello World First FastAPI app, run with uvicorn
- 4. OpenAPI & Swagger Automatic docs, /docs, /redoc
- 5. Uvicorn Basics ASGI server, reload, host/port, lifecycle
- 6. Type Hints Python type annotations, Union, Optional, List
- 7. IDE Support Autocomplete, type checking, Pylance
- 8. REST Architecture HTTP methods, resources, stateless design
- 9. Path Parameters Dynamic URLs, type conversion, order
- 10. Query Parameters Optional params, defaults, type coercion
- 11. Parameter Validation Query, Path, constraints, regex
- 12. Pydantic Models Data models, validation, BaseModel
- 13. Request Body JSON parsing, model validation, embedding
- 14. HTML Templates Jinja2Template, template rendering
- 15. Static Files MountStaticFiles, CSS/JS/images
- 16. HTML Forms Form submission, POST handling
- 17. Form Data Form, File, non-json data
- 18. File Upload UploadFile, multiple files, validation
- 19. Cookie Parameters Reading/writing cookies
- 20. Header Parameters Custom headers, User-Agent, auth headers
- 21. Response Model response_model, filtering, aliases
- 22. Nested Models Sub-models, lists, deep nesting
- 23. Dependencies Depends, dependency injection, reuse
- 24. CORS Cross-Origin Resource Sharing, middleware
- 25. CRUD Operations Create, Read, Update, Delete patterns
- 26. SQL Databases SQLAlchemy, async, PostgreSQL, migrations
- 27. MongoDB Motor, async, document operations
- 28. GraphQL Strawberry, graphene, queries/mutations
- 29. WebSockets Real-time communication, chat example
- 30. Event Handlers startup/shutdown, lifespan
- 31. Sub-Applications Mount sub-apps, versioning
- 32. Middleware Custom middleware, request/response processing
- 33. Flask Mount Mount Flask apps inside FastAPI
- 34. Deployment Uvicorn, Gunicorn, Docker, cloud hosting
- 35. Quick Guide Command cheatsheet, common patterns
- 36. Useful Resources Docs, community, books, tools
- 37. Discussion Q&A, comparisons, advanced topics
- 38. Appendix Best practices, interview questions, glossary
- 39. Bonus Who's who in FastAPI ecosystem