實現配套的基于nodejs的后臺增刪改查接口
1. 所需工具
2. 主要node模塊
koa(https://koa.bootcss.com,一個nodejs的開發框架),mongoose(https://mongoosejs.com,mongDB操作工具)
3. 目錄結構
4. 啟動MongoDB
首先在MongoDB安裝盤的根目錄下(這里假設是D盤)新建一個文件夾data,然后在MongoDB的bin中打開終端,輸入mongod --DBpath d:/data,這樣MongoDB的數據存放地點就配置好了。
然后雙擊bin中的mongo.exe,mongoDB就啟動完成了。
5. app.js
app.js為入口文件,功能是連接數據庫,導入文件,引入koa組件,最后啟動服務。
'use strict';const fs = require('fs');const path = require('path');const mongoose = require('mongoose');const db = 'mongodb://localhost/test';/* 連接數據庫 */mongoose.Promise = require('bluebird');mongoose.connect(db, {useMongoClient: true});/** * 獲取數據庫表對應的js對象所在的路徑 * @type {[type]} */const models_path = path.join(__dirname, '/app/models');/** * 已遞歸的形式,讀取models文件夾下的js模型文件,并require * @param {[type]} modelPath [description] * @return {[type]} [description] */let walk = function (modelPath) { fs.readdirSync(modelPath).forEach(function (file) { let filePath = path.join(modelPath, '/' + file) let stat = fs.statSync(filePath) if (stat.isFile()) { if (/(.*)/.(js|coffee)/.test(file)) { require(filePath) } } else if (stat.isDirectory()) { walk(filePath) } })};walk(models_path);require('babel-register');const Koa = require('koa');const logger = require('koa-logger');const session = require('koa-session');const bodyParser = require('koa-bodyparser');const app = new Koa();app.use(logger());app.use(session(app));app.use(bodyParser());/** * 使用路由轉發請求 * @type {[type]} */const router = require('./config/router')();app.use(router.routes());app.use(router.allowedMethods());app.listen(3000);console.log('app started at port 3000...');
6. 路由配置
路由配置在config/router.js中進行。
const Router = require('koa-router');const User = require('../app/controllers/user');module.exports = function () { let router = new Router({ prefix: '/api' }); router.post('/test/user/users', User.users); router.post('/test/user/user', User.user); router.post('/test/user/add', User.addUser); router.post('/test/user/delete', User.deleteUser); return router};
post方法第一參數為路由地址,第二參數為路由地址對應的方法。
7. 表結構定義
表結構定義在app/models/user.js中。
let mongoose = require('mongoose');let Schema = mongoose.Schema;// 定義表結構let UserSchema = new Schema({ name: { type: String, required: true }, sex: String, area: String, always: Boolean, relationship: Array, mobile: String, phone: String, desc: String, id: String});// 參數User 數據庫中的集合名稱, 不存在會創建.let User = mongoose.model('User', UserSchema);module.exports = User;
8. 工具方法
一些增刪改查的工具方法放在app/dbhelp/userHelp.js中
'use strict';let mongoose = require('mongoose');let User = mongoose.model('User');/* 查找用戶 */exports.findAllUsers = async () => { let query = User.find(); let res = []; await query.exec(function (err, users) { if (err) { res = []; } else { res = users; } }); return res};/* 查找特定用戶 */exports.findFilterUsers = async (params) => { let nameReg = new RegExp(params.name, 'i'); let query = User.find({ name: { $regex: nameReg } }); let res = []; await query.exec(function (err, users) { if (err) { res = [] } else { res = users; } }); return res};/* 查找單個用戶 */exports.findUser = async (params) => { let query = User.find({ id: params.id }); let res = {}; await query.exec(function (err, tUser) { if (err) { res = '沒有該用戶'; } else { res = tUser[0]; } }); return res};/* 新增用戶 */exports.addUser = async (user) => { user = await user.save(); return user};/* 編輯用戶 */exports.updateUser = async (user) => { user = await User.update({id: user.id}, { $set: { name: user.name, sex: user.sex, area: user.area, always: user.always, relationship: user.relationship, phone: user.phone, mobile: user.mobile, desc: user.desc } }); return user};/* 刪除用戶 */exports.deleteUser = async ({id}) => { let flag = false; console.log('flag==========>' + flag); await User.remove({id}, function (err) { if (err) { flag = false } else { flag = true } }); console.log('flag=====await=====>' + flag); return flag};
9. 路由配置中對應的方法
路由配置中對應的方法在app/controller/user.js中。
'use strict';let xss = require('xss');let mongoose = require('mongoose');let User = mongoose.model('User');let uuid = require('uuid');import userHelper from '../dbhelper/userHelper.js'/* 多用戶 */exports.users = async (ctx, next) => { let data; if (ctx.request.body) { data = await userHelper.findFilterUsers(ctx.request.body) } else { data = await userHelper.findAllUsers() } ctx.body = { success: true, data }};/* 單用戶 */exports.user = async (ctx, next) => { let data = await userHelper.findUser(ctx.request.body) ctx.body = { success: true, data }};/* 添加(更新)用戶 */exports.addUser = async (ctx, next) => { let newObj = ctx.request.body, user2; let id = newObj.id || uuid.v4(); let user = new User({ name: newObj.name, sex: newObj.sex, area: newObj.area, always: newObj.always, relationship: newObj.relationship, phone: newObj.phone, mobile: newObj.mobile, desc: newObj.desc, id: id }); if (newObj.id) { user2 = await userHelper.updateUser(user); } else { user2 = await userHelper.addUser(user); } if (user2) { ctx.body = { success: true, data: user2 } }};/* 刪除用戶 */exports.deleteUser = async (ctx, next) => { let id = xss(ctx.request.body.id); let data = await userHelper.deleteUser({id}); ctx.body = { success: true, data }};
總結:
其實沒有什么花頭,無非都是api的使用,這里比較多用async與await實現異步操作,阮老師的文章里有async的一切,http://es6.ruanyifeng.com/#docs/async。
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持VeVb武林網。
新聞熱點
疑難解答