CODEWITHSUNDEEP
node.jsexpressmongoose
user8765531
user8765531

Reputation:

can't connect to MongoDb using mongoose. MongoDB installed in my local system

I cant connect to MongoDb using mongoose. I have installed MongoDB in my local system

//Import the mongoose module
    var mongoose = require('mongoose');

    //Set up default mongoose connection`enter code here`
    var mongoDB = 'mongodb://localhost/my_database';
    mongoose.connect(mongoDB, {
      useMongoClient: true
    });

    //Get the default connection
    var db = mongoose.connection;

    //Bind connection to error event (to get notification of connection errors)
    db.on('error', console.error.bind(console, 'MongoDB connection error:'));

    module.exports = mongoose.connection;

getting the error:

// MongoDB connection error: { MongoError: failed to connect to server [localhost:27017] on first connect

Upvotes: 1

Views: 2665

Answers (3)

Felix Orinda
Felix Orinda

Reputation: 743

I had the same problem. Seemingly using localhost in your connection string is the issue. Best just use 127.0.0.1 in place of localhost. In linux both work well but windows the localhost has issues

Example:

const DB_URL="mongodb://127.0.0.1/<db_name>"

Upvotes: 4

Daniel
Daniel

Reputation: 15413

Hareesh, you need to test your code, more specifically, your connection between Mongoose and Mongo. Mongoose is just a library, it does not automatically connect to Mongo which is why you have the code above to tell it to do so, but you need to test that.

Create a test directory at the root of whatever it is you called this project. Inside of the test folder, create a test_helper.js file. Inside of it, you are going to write the code above, but refactor it into the ES6 model in this manner.

//Import the mongoose module
const mongoose = require(‘mongoose’);

//Set up default mongoose connection`enter code here
mongoose.connect(‘mongodb://localhost/project_test’);
mongoose.connection
     .once(‘open’, () => console.log(‘Good to go!’))
     .on(‘error’, (error) => {
        console.warn(‘Warning’, error);
});

Hope this helps.

Upvotes: 0

H. Hakvoort
H. Hakvoort

Reputation: 161

Did you start mongoDb with the command mongod Maybe run it on a differnt port with mongod --port 12345

Upvotes: 0

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