Full stack fastapi handbook Chapter 3
Stop treating the Full Stack FastAPI Template like a collection of mysterious folders.
This free chapter gives you a practical mental model of how the entire application fits together. Follow a browser request through Traefik, FastAPI dependencies, SQLModel, and PostgreSQL. See where OAuth2 authentication is enforced, how Docker Compose connects the services, and how the generated API client links the React frontend to the backend.
By the end, you’ll understand:
- How requests travel through the stack
- Where authentication and permissions are applied
- How the frontend, API, database, and containers communicate
- Which files matter when you begin extending the application
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