From Flask to FastAPI
I made the switch from Flask to FastAPI last month. The learning curve was minimal, and the benefits are huge. Automatic OpenAPI docs, better performance, and native async support. No regrets!
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DefaultDude
Understanding HTTP Status Codes
200 OK, 201 Created, 400 Bad Request, 404 Not Found, 500 Internal Server Error. Learn these codes - they're how your API communicates with the world. FastAPI makes it easy to return the right ones.
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Why I Switched to UV
UV is blazingly fast for Python package management. Install packages in milliseconds instead of minutes. If you haven't tried it yet, you're missing out!
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The Beauty of Response Models
Response models aren't just for documentation - they filter out sensitive fields automatically. Define what goes out, and Pydantic handles the rest.
WebSockets with FastAPI
REST isn't the only game in town. FastAPI supports WebSockets for real-time communication. Chat apps, live updates, notifications - all possible!
Health Check Endpoints
Add a /health endpoint to your API. Load balancers and orchestrators need to know if your service is alive. Return 200 if healthy, details if not. I didn't do this in this tutorial, but there's only so much time in a video!
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GraphQL vs REST
GraphQL is trendy, but REST is battle-tested. Choose based on your needs, not hype. FastAPI excels at REST, but Strawberry brings GraphQL if you need it.
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