重新node 后台serverjs 报错

Question

const express = require('express')

const mongoose = require('mongoose')

//链接mongo 并且使用imooc集合

const DB_URL = 'mongodb://localhost:27017/imooc'

mongoose.connect(DB_URL)

mongoose.connection.on('connected',function(){

console.log('mongo connect success')

})

const User = mongoose.model('user',new mongoose.Schema({

user:{type:String,require:true},

age:{type:Number,require:true}

}))

//create 新增数据

// User.create({

//     user:'xiaohong',

//     age:30

// },function(err,doc){

//     if(!err){

//         console.log(doc);

//     }else{

//         console.log(err);

//     }

// })

//express

// User.update({'user':'xiaoming'},{'$set':{age:26}},function(err,doc){

//     console.log(doc)

// })

const app = express()

// User.remove({age:18},function(err,doc){

//     console.log(doc);

// })

app.get('/',function(req,res) {

res.send('<h1>hello world</h1>')

})

app.get('/data',function(req,res) {

User.findOne({user:'xiaoming'},function(err,doc){

res.json(doc)

})

})

app.listen(9093,function () {

console.log('Node app start at port 9093')

})

Answer 1

提问者 慕粉1461502176 2018-03-01 18:08:03

 ✘ shenya@shenyadeMacBook-Pro  ~/imooc  mongo

MongoDB shell version v3.6.2

connecting to: mongodb://127.0.0.1:27017

2018-03-01T17:58:23.375+0800 W NETWORK  [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused

2018-03-01T17:58:23.375+0800 E QUERY    [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed :

connect@src/mongo/shell/mongo.js:251:13

@(connect):1:6

exception: connect failed