Nodejs-增删改查-案列方法

const express = require('express');
const path = require('path')
const fs = require('fs')const rout = express.Router();const file_path = path.join(__dirname, '../data/student.json')// 查询学生列表  搜索学生信息
rout.get('/student', (req, res) => {fs.readFile(file_path, 'utf8', (err, data) => {if (err) {throw err;}data = JSON.parse(data)if (req.query.name) {data = data.filter((ele) => {if (ele.name.includes(req.query.name)) {return ele;}})}res.render('student/index', {title: '学生信息列表',data})})})// 删除学生信息rout.get('/student/remove', (req, res) => {const removeId = req.query.id;fs.readFile(file_path, 'utf8', (err, data) => {if (err) {throw err;}data = JSON.parse(data)const index = data.findIndex((ele, index) => {if (ele.id = removeId) {return index;}})if (index >= 0) {data.splice(index, 1)}fs.writeFile(file_path, JSON.stringify(data, null, 4), (err) => {res.redirect('/student')})})
})// 新建学生页面
rout.get('/student/add', (req, res) => {res.render('student/add.ejs')
})// 新建学生页面 提交
rout.post('/student/add/submit', (req, res) => {const studentToadd = Object.assign({id: Date.now()}, req.body)fs.readFile(file_path, 'utf8', (err, data) => {if (err) {throw err;}data = JSON.parse(data);data.push(studentToadd);fs.writeFile(file_path, JSON.stringify(data, null, 4), (err) => {res.redirect('/student')})})
})// 修改学生页面
rout.get('/student/update', (req, res) => {fs.readFile(file_path, 'utf8', (err, data) => {data = JSON.parse(data);data = data.find((ele) => {if (ele.id == req.query.id) {return ele;}})res.render('student/update.ejs', {data,})})})// 修改学生页面提交
rout.post('/student/update/submit', (req, res) => {fs.readFile(file_path, 'utf8', (err, data) => {if (err) {throw err;};console.log(req.body)data = JSON.parse(data);data.forEach((ele) => {if (ele.id == req.body.id) {Object.assign(ele, req.body)}});fs.writeFile(file_path, JSON.stringify(data, null, 4), (err) => {res.redirect('/student')})})})module.exports = rout;