14. CRUD

CRUD : Create(POST), Read(GET), Update(PUT), Delete(DELETE)

 

controllers - <contactControllers.js> : 데이터 추가

※create() : 데이터베이스에 새로운 도큐먼트를 추가

const asynchHandler = require("express-async-handler");
const Contact = require("../models/contactModel"); //contactModel.js 모델을 가져옴

(...)

//Post all contact, /contact
const createContect = asynchHandler(async (req, res) => {
  console.log(req.body);
  const { name, email, phone } = req.body;
  if (!name || !email || !phone) {
    res.status(400).send("No Input Value");
  }
  const contact = await Contact.create({ name, email, phone }); //도큐먼트 추가
  res.status(201).send("Create Contact");
});

(...)

---

controllers - <contactControllers.js> : 데이터 가져오기

※find() : 지정한 조건의 맞는 도큐먼트를 찾음, 조건을 지정하지 않으면 도큐먼트 전부 가져옴

※findById() : 아이디 값을 기준으로 도큐먼트를 찾음

(...)

//Get all contact, /contact
const getAllContact = asynchHandler(async (req, res) => {
  const contact = await Contact.find(); //도큐먼트 가져오기
  res.status(200).send(contact);
});

(...)

//Get get contact, /contact/:id
const getContact = asynchHandler(async (req, res) => {
  const contact = await Contact.findById(req.params.id); //특정 ID 도큐먼트 가져오기
  res.status(200).send(contact);
});

(...)

---

controllers - <contactControllers.js> : 데이터 수정하기

※save() : 수정된 데이터를 다시 저장

(...)

//Put update contact, /contact/:id
const updateContact = asynchHandler(async (req, res) => {
  const { name, email, phone } = req.body; //name, email, phone를 요청 본문에 할당
  const contact = await Contact.findById(req.params.id); //특정 ID 도큐먼트 찾기
  if (!contact) { //특정 ID 도큐먼트가 없을 경우
    res.status(400).send("No Document");
  }
  (contact.name = name), (contact.email = email), (contact.phone = phone); //req.body에 담긴 새로운 값을 contact에 지정
  contact.save(); //수정된 자료를 데이터베이스에 저장
  res.status(200).send(contact);
});

(...)

---

controllers - <contactControllers.js> : 데이터 삭제하기

※deleteOne() : 도큐먼트를 삭제

(...)

//Delete delete contact, /contact/:id
const deleteContact = asynchHandler(async (req, res) => {
  const contact = await Contact.findById(req.params.id); //특정 ID 도큐먼트 찾기
  if (!contact) { 
    res.status(400).send("No Document");
  }
  await Contact.deleteOne(); //도큐먼트 삭제
  res.status(200).send(`Delete Contact for ID : ${req.params.id}`);
});

(...)

---

controllers - <contactControllers.js> 전체 코드

const asynchHandler = require("express-async-handler");
const Contact = require("../models/contactModel");

//Get all contact, /contact
const getAllContact = asynchHandler(async (req, res) => {
  const contact = await Contact.find();
  res.status(200).send(contact);
});

//Post all contact, /contact
const createContect = asynchHandler(async (req, res) => {
  console.log(req.body);
  const { name, email, phone } = req.body;
  if (!name || !email || !phone) {
    res.status(400).send("No Input Value");
  }
  const contact = await Contact.create({ name, email, phone });
  res.status(201).send("Create Contact");
});

//Get get contact, /contact/:id
const getContact = asynchHandler(async (req, res) => {
  const contact = await Contact.findById(req.params.id);
  res.status(200).send(contact);
});

//Put update contact, /contact/:id
const updateContact = asynchHandler(async (req, res) => {
  const { name, email, phone } = req.body;
  const contact = await Contact.findById(req.params.id);
  if (!contact) {
    res.status(400).send("No Document");
  }
  (contact.name = name), (contact.email = email), (contact.phone = phone);
  contact.save();
  res.status(200).send(contact);
});

//Delete delete contact, /contact/:id
const deleteContact = asynchHandler(async (req, res) => {
  const contact = await Contact.findById(req.params.id);
  if (!contact) {
    res.status(400).send("No Document");
  }
  await Contact.deleteOne();
  res.status(200).send(`Delete Contact for ID : ${req.params.id}`);
});

module.exports = {
  getAllContact,
  createContect,
  getContact,
  updateContact,
  deleteContact,
};