GuideIntermediate

FastAPI Advanced Features Guide

This guide takes your FastAPI knowledge to the next level: dependency injection for DRY, testable code, APIRouter for modular apps, WebSockets for real-time communication, background tasks, file uploads and custom middleware.

30
lessons
7
modules
English · Spanish
available in
Yes
certificate
Included in the Club
access
NIEVA

Outcomes

What you'll be able to do

  • Dependency Injection: Depends(), sub-dependencies, yield dependencies
  • APIRouter: Modularization, prefixes, tags, professional organization
  • Middleware: Custom middleware, logging, timing, events
  • Background Tasks: Asynchronous operations, intro to Celery/RQ
  • WebSockets: Real-time communication, broadcasting
  • File Uploads: Multipart forms, validation, image handling
  • Response Models: StreamingResponse, FileResponse, multiple schemas

Before you start

What you need to bring

Requirements and materials

  • FastAPI Fundamentals Guide completed
  • Solid grasp of CRUD, Pydantic, error handling
  • Python 3.9+, uvicorn

Content

The syllabus, module by module

Open any of them to see its lessons.

  • Introduction to Module 1: Dependency Injection
  • Basic Depends() — Your First Dependency Injection
  • Sub-dependencies and Composition — Dependency Chains
  • Yield Dependencies and Lifecycle — Setup, Cleanup, and Testing
  • Project: Refactoring the To-Do API with Dependency Injection

  • Module 2 Introduction: APIRouter and Middleware
  • APIRouter and Modularization — Splitting Endpoints by Domain
  • A Professional Folder Structure — Organizing a FastAPI Project
  • Custom Middleware and Lifespan Events — Cross-Cutting Concerns
  • Project: Turning the To-Do API into a Modular App

  • Introduction to Module 3: Advanced Response Models
  • Advanced response_model
  • Streaming and File Responses
  • Custom Responses and Headers
  • Project: Professional Responses for the Task Manager API

  • Introduction to Module 4: Background Tasks
  • BackgroundTasks in FastAPI
  • Patterns and Error Handling in Background Tasks
  • Celery and RQ — An Introduction
  • Project: Background Processing for the Task Manager API

  • Module 5: WebSockets and File Uploads
  • Basic WebSockets in FastAPI
  • ConnectionManager and Broadcasting
  • File Uploads and Validation
  • Project: Real-time Notifications and File Uploads

  • Final Project: Advanced Task Manager API
  • Architecture: Models, Data, and Dependencies
  • CRUD Endpoints, Responses, and Background Tasks
  • WebSocket, File Uploads, and Middleware
  • End-to-end Verification, README, and Portfolio

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