put 和 patch 方法区别
put 需要提交完整的 对象数据，patch 只需要提供对象的部分属性即可。
实测，patch，和put方法可以相互替代使用，并没有报错。
routers/users.js
controllers/user.js
本课代码
https://github.com/monk8/expressjs-rest-api-server/tree/lesson06
REST-API-06-More-Routers
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const express = require('express');
const router = require('express-promise-router')();
const userController = require('../controllers/users');
router.route('/')
.get(userController.index)
.post(userController.newUser);
router.route('/:userId')
.get(userController.getUser)
.put(userController.replaceUser)
.patch(userController.updateUser)
;
module.exports = router;
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const User = require('../models/user')
module.exports = {
index: async (req, res, next) => {
const users = await User.find();
//throw new Error('Dummy error !');
res.status(200).json(users);
},
newUser: async (req, res, next) => {
const newUser = new User(req.body);
const user = await newUser.save();
res.status(200).json(user);
},
getUser: async (req, res, next) => {
// enforce that req.body must contain all the fields
console.log('req.params', req.params);
const { userId } = req.params;
const users = await User.findById(userId);
res.status(200).json(users);
},
replaceUser: async (req,res,next) =>{
// req.body may contain any number of fields
const { userId } = req.params;
const newUser = req.body;
const result = await User.findByIdAndUpdate(userId,newUser);
res.status(200).json({success:true});
},
updateUser: async (req,res,next) =>{
const { userId } = req.params;
const newUser = req.body;
const result = await User.findByIdAndUpdate(userId,newUser);
res.status(200).json({success:true});
}
}