Lesson 03 · 11 min
Pydantic models
A class describes the request body. FastAPI validates it for you.
11 minLesson 3 of 9Practice includedAsk AI on any point
A Pydantic model is a class with annotated fields. If a function argument has a model type, FastAPI reads the JSON body, checks types and constraints, and passes a ready object. response_model describes what goes back, and extra fields get filtered out.
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