What you will learn

• Build and deploy scalable FastAPI applications
• Implement robust testing strategies with pytest
• Integrate async databases and manage configurations
• Enhance applications with advanced logging and authentication
• Execute background tasks and manage file uploads
• Deploy applications to cloud platforms and implement CI/CD

Course Outline

Course Introduction

• Community
• Welcome to this course!
• What is an API?
• What is REST?

Working with FastAPI

• Introduction to this section
• Your First FastAPI App
• Initial App Setup
• Linting, formatting and sorting imports
• Our social media API: adding posts
• Splitting our API into files with APIRouter
• Adding comments to the social media API

Introduction to pytest

• Introduction to the pytest section
• The basics of pytest
• Getting started with FastAPI tests
• Creating posts in our tests
• Adding tests for posts
• Adding comments tests

Working with async databases

• Introduction to working with databases
• Installing requirements for async databases in FastAPI
• Creating a config file using Pydantic
• Different configurations per environment
• Config caching and how to get the config object
• Async database setup with FastAPI
• Database connection with lifespan events in FastAPI
• Run your FastAPI test in 'test' mode
• Using a database in our FastAPI router

Logging in FastAPI applications

• Introduction to logging
• Python logging: loggers, handlers, and formatters
• Logger hierarchies and name
• Adding Logging Configuration for FastAPI Applications
• How to configure multiple loggers in the logging module
• Adding File Handlers for Saving Logs
• Add logging to your FastAPI endpoints
• Python logging: filters and custom filters
• Logging HTTPExceptions with an Exception Handler
• Identifying logs from the same request: Correlation ID
• Adding JSON-formatted log files
• Obfuscating email addresses in logs using a custom filter
• Adding Logtail for Cloud Logging in FastAPI
• Enabling Logtail only in production

User authentication with FastAPI

• Introduction to user authentication
• Installing requirements and, what are JWTs?
• Adding a users table and retrieving users by email
• Adding user registration and tests
• Adding tests for the user registration endpoint
• How to hash passwords with passlib
• Generate the access token
• Retrieve the current user with their token
• Use the current user in the API router
• Dependency injection: getting the user
• Adding user relationships to other tables
• (Optional) OAuth Password Bearer and Swagger Auth

Many-to-many relationships

• Adding a table for post likes
• Adding an API route to like posts
• Extracting reusable queries with SQLAlchemy
• Query string arguments and data sorting with Enum

User email confirmation

• Creating the confirmation token
• Decoding the confirmation token
• Adding a user confirmation endpoint
• Requiring user confirmation for authenticated requests
• Mailgun set-up and configuration
• Sending emails and testing with Python
• Sending a confirmation email on registration
• Sending emails with background tasks

File Uploads with FastAPI

• Our configuration for Backblaze B2
• Internal library for Backblaze B2
• Writing our file upload endpoint
• Writing tests for file upload

Background Tasks for Image Generation

• Model and database changes for image generation
• Configuration for DeepAI, our third-party service
• Generating images using background tasks
• Executing image generation in our FastAPI endpoint

FastAPI Deployments and Application Management

• Updating our project to Pydantic v2
• Deploy a FastAPI app to Render
• Add a free PostgreSQL database to your FastAPI app
• Error management with Sentry for FastAPI apps
• Continuous Integration with GitHub Actions for Python apps