FastAPI in Prod: Handling DB migrations, auth, and more

FastAPI, a modern Python framework, is highlighted for its speed, developer-friendly features, and automatic OpenAPI schema generation, making it a versatile choice for building backend applications. The discussion centers on creating a full-featured backend for a multi-tenant "bookmark aggregator," leveraging various tools and libraries such as dbmate for database migrations, PugSQL for database interactions, PropelAuth for authentication and multi-tenancy, and Pydantic for data validation. The setup involves managing database schemas with dbmate, writing SQL queries using PugSQL, creating endpoints with FastAPI, and ensuring data integrity and request validation through Pydantic models. Additionally, PropelAuth is used to secure routes and manage user roles and permissions within an organization. The guide also touches on generating unique IDs with nanoid and demonstrates how to integrate these components into a cohesive application, culminating in a robust, production-ready backend system that can be easily extended for additional features.