从Mongo数据库中的轮询应用程序保存投票

Question

我用node.js创建了一个Polling应用程序现在我想将数据保存在数据库中。但我只是得到一个错误即使我安装了mongodb和mongoose这是我的代码：

const mongoose = require('mongoose');

//Map global promises
mongoose.Promise = global.Promise;
//Mongoose Connect
mongoose.connect('mongodb://localhost:27017/myapp', {useNewUrlParser: true});
.then(() => console.log('MongoDB Connected'))
.catch(err => console.log(err));

Answer 1

用您的代码替换此代码，并检查您是否正在获取控制台

var mongoose = require('mongoose');
mongoose.Promise = global.Promise;

mongoose.connect('mongodb://localhost/myapp',(err) => {
   if (err) {
      console.log('Sorry can not connect with mongodb...');
   } else {
      console.log('Successfully connected mongodb...');
   }
});