MongooseServerSelectionError：在 windows 7 中连接 ECONNREFUSED 127.0.0.1:27017

Question

I am working with MongoDB with the Nodejs. I have following index.js file,

const express= require('express');
const mongoose= require('mongoose');

const app= express();

const port=3000;
mongoose.connect('mongodb://127.0.0.1:27017/ThogaKade',{
    useNewUrlParser:true,
    useUnifiedTopology:true,
    useFindAndModify:false,
    useCreateIndex:true
}).then(()=>{
    app.listen(port,()=>{
        console.log(`Server Start on Port ${port}`)
    })
}).catch(error=>{
    console.log(error);
})

but when I execute nodemon command it is en counting following error message here

MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017

how could I fix this problem?

Answer 1

• Make sure mongo service is properly installed and started https://docs.mongodb.com/manual/tutorial/install-mongodb-on-windows/

• User and password are missing in your string. See https://docs.mongodb.com/manual/reference/connection-string/

• Use the option authSource :

  mongodb://<user>:<password>@127.0.0.1:27017/ThogaKade?authSource=admin

In this way, you are authenticating on database admin and using database ThogaKade for connection.

See https://docs.mongodb.com/manual/tutorial/manage-users-and-roles/ too