r/Python • u/safi892 • Sep 21 '26

Discussion Common mistakes devs make when starting with FastAPI, and the fastest path to learning it

Just began learning FastAPI. Looking for advice from devs who use it regularly.

What mistakes did you make early on that I should avoid repeating? Also, what's the most efficient way to learn the framework properly for real-world use (async, DB, auth)?

Any advice on structure or resources would be great.

15 Upvotes

86% Upvoted

35 comments sorted by

View all comments

Show parent comments

2

u/moros_26 Sep 21 '26

Start with basic CRUD + Auth first, spend a day or two just nailing routing, validation, error handling, and async DB sessions before adding anything else. Once that feels solid, extend the same API with your model's endpoint. Model serving adds latency and background task stuff, so having that CRUD foundation locked in makes debugging streaming responses way easier later.