[node.js/Koa][React] 배열 항목 하나 추가

hospitals.ctrl.js

import Hospital from "../../models/hospital"

// 병원에서 예약된 시간 추가
export const updateTime = async (ctx) => {
    const { _id, reservationTime } = ctx.params
    let hospital
    try {
      hospital = await Hospital.findOneAndUpdate(
        { _id: _id }, // id로 찾아서
        {
          $addToSet: {
            reservationTime: reservationTime, // 해당 id의 reservationTime만 업데이트(칼럼 추가)
          }
        }
      ).exec()
    } catch (e) {
      ctx.throw(500, e)
    }
    ctx.body = hospital
  }

index.js

import Router from "koa-router"
import { updateTime } from "./hospitals.ctrl"

const hospitals = new Router()

hospitals.put('/:_id/:reservationTime', updateTime)

export default hospitals

reservation.jsx

import axios from 'axios'

const handleSubmit=()=>{
    axios.put("/api/hospitals/"+hsp.id+'/'+reserve.dateDay)        // 병원에 예약 시간 정보 저장
        .then((response) => {
            console.log('reservationTime:',response)
        })
        .catch((error) => {
            console.log(error)
        })
}