How do I validate request data in FastAPI/Pydantic?

In FastAPI, you can easily validate request data using Pydantic models. Pydantic allows you to create data models with type hints, which will automatically validate incoming request data to ensure it adheres to the specified types and constraints.

Example of Request Data Validation

Here’s a simple example demonstrating how to use Pydantic for validating request data in FastAPI:


    from fastapi import FastAPI
    from pydantic import BaseModel

    app = FastAPI()

    class Item(BaseModel):
        name: str
        price: float
        quantity: int

    @app.post("/items/")
    async def create_item(item: Item):
        return item