from fastapi import FastAPI

from fastapi.encoders import jsonable_encoder

from fastapi.exceptions import RequestValidationError

from pydantic import BaseModel

from starlette import status

from starlette.requests import Request

from starlette.responses import JSONResponse

app = FastAPI()

@app.exception_handler(RequestValidationError)

async def validation_exception_handler(request: Request, exc: RequestValidationError):

return JSONResponse(

status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,

content=jsonable_encoder({"detail": exc.errors(), "body": exc.body}),

)

class Item(BaseModel):

title: str

size: int

@app.post("/items/")

async def create_item(item: Item):

return item