1.配置项

yarn add  koa koa-router koa2-cors art-template koa-art-template  koa-multer mongoose
yarn add  koa-bodyparser koa-body  koa-static 
yarn add require-directory

E:\毕设\mongo-sale

1.config/index.js

const Router = require("koa-router");
const requireDirectory = require("require-directory");
const render = require('koa-art-template');
const static = require('koa-static');
const koaBody = require('koa-body')
function initManage(app) {
    app.use(koaBody({
        // 支持文件格式
        multipart: true, // 支持图片上传
        formidable: {
            maxFileSize: 20*1024*1024, // 文件最大2OMB
            keepExtensions: true     // 保留文件扩展名
        }
    }));
    /* 加载/routers/m1下的文件时,会触发loadRouters函数 */
    requireDirectory(module, `${process.cwd()}/routers`, {
        visit: loadRouters
    })
    render(app, {
        root: `${process.cwd()}/views`,
        extname: '.html', //后缀也可以写成.art
        debug: process.env.NODE_ENV !== 'production'
    });
    function loadRouters(obj) {
        if (obj instanceof Router) {
            app.use(obj.routes());
        }
    }
    app.use(static(`${process.cwd()}/images`));
    app.use(static(`${process.cwd()}/static`));
}
module.exports = initManage;

2.models/db.js

const mongoose = require("mongoose");
/* 1.连接本地数据库 */
mongoose.connect('mongodb://127.0.0.1:27017/students', {
    useNewUrlParser: true
});
module.exports = mongoose;

3.models/Members.js

const mongoose = require("./db");
const MembersSchema = new mongoose.Schema({
    name:String,
    age:String,
    avatar:String,
    like:Boolean,
    friend:Boolean
},{
    versionKey: false
})
const MembersModel = mongoose.model("Members",MembersSchema,"members");
module.exports = MembersModel;

4.入口文件index.js

const Koa = require("koa");
const app = new Koa();
const initManage = require("./config");
initManage(app);
app.listen(8080)