koa,express,node閫氱敤鏂规硶杩炴帴MongoDB
Posted Node鍓嶇
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杩欐槸鎴戠殑鐩綍
鎴戠殑瀹夎鐨勪緷璧栫増鏈細
"dependencies": {
"koa": "^2.6.2",
"mongoose": "^5.3.12",
}`
1.杩炴帴MongoDB
// db/db.js
const mongoose = require('mongoose')
const DB_URL = 'mongodb://localhost:27017/local'
mongoose.connect(DB_URL)
mongoose.connection.on('connected',function() {
console.log('Mongoose connection open to '+DB_URL);
});
/**
* 杩炴帴寮傚父 error 鏁版嵁搴撹繛鎺ラ敊璇?/span>
*/
mongoose.connection.on('error',function(err) {
console.log('Mongoose connection error: '+ err);
});
/**
* 杩炴帴鏂紑 disconnected 杩炴帴寮傚父鏂紑
*/
mongoose.connection.on('disconnected',function() {
console.log('Mongoose connection disconnected');
});
module.exports = mongoose
`
2.璁剧疆闇€瑕佹搷浣滅殑闆嗗悎
// db/index.js
const mongoose = require('./db')
const Schema = mongoose.Schema;
const ceshiSchema = new Schema({
title: String,
body: String,
date: Date
});
const MyModel = mongoose.model('ceshi', ceshiSchema);
class Mongodb {
constructor () {
}
// 鏌ヨ
query () {
return new Promise((resolve, reject) => {
MyModel.find({}, (err, res) => {
if(err) {
reject(err)
}
resolve(res)
})
})
}
// 淇濆瓨
save (obj) {
const m = new MyModel(obj)
return new Promise((resolve, reject)=> {
m.save((err, res) => {
if (err) {
reject(err)
}
resolve(res)
console.log(res)
})
})
}
}
module.exports = new Mongodb()
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3.璁剧疆鏈嶅姟鍣?/h2>
// index.js
const Koa = require('koa')
const config = require('./config/default')
const ModelDb = require('./db')
const app = new Koa()
app.use(async (ctx) => {
let data = await ModelDb.query()
ctx.body = data
})
app.listen(config.port)
console.log(`listening on port ${config.port}`)
4.鍚姩鏈嶅姟鍣?/h2>
// index.jsconst Koa = require('koa')const config = require('./config/default')const ModelDb = require('./db')const app = new Koa()app.use(async (ctx) => {let data = await ModelDb.query()ctx.body = data})app.listen(config.port)console.log(`listening on port ${config.port}`)
鎵撳紑娴忚鍣紝灏卞彲浠ョ湅鐨勬煡璇㈠嚭鏉ョ殑缁撴灉
娉ㄦ剰锛氬墠鎻愬湪ceshi缁撳悎瑕佹湁鏂囨。锛屼篃灏辨槸瑕佹湁鏁版嵁
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