【FastAPI】FastAPIによるお手軽！型定義共有

from datetime import date, datetime

from fastapi import APIRouter, Depends, HTTPException, status

from app.schemas import timedifference

router = APIRouter()


@router.get("/")
def get_time_difference(
    req: timedifference.GetTimeDifferenceRequest = Depends(),
) -> timedifference.GetTimeDifferenceResponse:
    # datetime.timeオブジェクトでは日付の差分が計算できないのでdatetime.datetimeを使用する
    now_date = date.today()
    date_value = [now_date.year, now_date.month, now_date.day]

    start_datetime = datetime(
        *date_value,
        hour=int(req.start_hour.value),
        minute=int(req.start_minute.value),
    )
    end_datetime = datetime(
        *date_value,
        hour=int(req.end_hour.value),
        minute=int(req.end_minute.value),
    )

    if end_datetime < start_datetime:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=[
                {
                    "loc": ["start_hour, start_minute, end_hour or end_minute"],
                    "msg": "Please confirm your entry.",
                    "type": "value_error",
                }
            ],
        )

    timedelta_value = end_datetime - start_datetime

    return {"overTime": f"{timedelta_value.seconds / 3600}h"}

from pydantic import BaseModel, ConfigDict
from pydantic.alias_generators import to_camel


class CustomBaseModel(BaseModel):
    model_config = ConfigDict(alias_generator=to_camel)

gcloud run deploy --source

yarn add @openapitools/openapi-generator-cli

{
  "name": "calculation-tools",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint",
    "openapi:generate": "openapi-generator-cli generate -g typescript-axios -i ./config/openapi.json -o ./src/types/axios"
  },
  "dependencies": {
    "@openapitools/openapi-generator-cli": "^2.7.0",
    "axios": "^1.6.2",
    "next": "12.1.0",
    "pokenode-ts": "^1.13.0",
    "react": "17.0.2",
    "react-dom": "17.0.2",
    "swr": "^2.2.4"
  },
  "devDependencies": {
    "@types/node": "17.0.21",
    "@types/react": "17.0.41",
    "eslint": "8.11.0",
    "eslint-config-next": "12.1.0",
    "typescript": "4.6.2"
  }
}

yarn openapi:generate

import useSWR from 'swr';
import { KeyedMutator } from 'swr';

import {
  TimeDifferenceApi,
  GetTimeDifferenceResponse,
  TimeDifferenceHour,
  TimeDifferenceMinute,
} from '../../types/axios';

import { config } from '../config';

type UseGetTimeDifferenceResponse = {
  data?: GetTimeDifferenceResponse
  error: any
  mutate: KeyedMutator<any>
};

const timeDifferenceApi = new TimeDifferenceApi(config);

export type GetTimeDifferenceParam = {
  startHour: TimeDifferenceHour
  startMinute: TimeDifferenceMinute
  endHour: TimeDifferenceHour
  endMinute: TimeDifferenceMinute
};

export const useGetTimeDifference = ({
  startHour, startMinute, endHour, endMinute
}: GetTimeDifferenceParam): UseGetTimeDifferenceResponse => {
  const fetcher = () => (
    timeDifferenceApi.getTimeDifferenceTimedifferenceGet(startHour, startMinute, endHour, endMinute)
      .then((res) => res.data)
      .catch((err) => err)
  );

  const { data, error, mutate } = useSWR("/timedifference/", fetcher);

  return {
    data,
    error,
    mutate,
  };
};