Question 115431 in Mongodb Question posted in
The official documentation can be found here.

Failed to connect to mongoDb using mongoose and nodejs

my app.js file has code :

const connectDB = require("./db/connect");
require("dotenv").config()
const app = express();
const url = process.env.MONGO_URI;
const port = 8080;
// listen to server
const start =async () =>{
  try {
    
   await  connectDB(url);
    app.listen(port, () => {
      console.log("Connected To DB + App is listening on http://localhost:${port}");
    });
  } catch (error) {
    console.log(error);
    
  }
};

// call the start function
start();

my connect.js file has code :


mongoose.set('strictQuery', true);
const connectDB = (url)=>{
    return  mongoose.connect(url)
}
module.exports = connectDB;

.env file has this variable :

MONGO_URI =mongodb+srv://<username>:<password>@cluster0.prrizft.mongodb.net/TaskManager?retryWrites=true&w=majority

In the above string I am using the correct username and password.

Also I have already add the ip in network (both : from anywhere and my current ip).
I can able to successfully connect the above string with mongo compass (plus I tested to create a dummy collection and insert document…. everything work fine)

But when I connect the mongoAtlas with node.js using mongoose I will get error[enter image description here](https://i.stack.imgur.com/Ir5BQ.png)

Tags:

3

Answers


  1. 0

    Using the ‘dotenv’ package requires initializing the library at the beginning of your script. This can be done in the npm start script or terminal:

    nodemon -r dotenv/config myscript.js

    Or if you must include within the code, require(‘dotenv’).config() should be called at the very top of your entry script as in the above:

    // myscript.js
require('dotenv').config()

// everything else

    So in your code example, replace:

    const express = require('express');
const mongoose = require('mongoose');
const connectDB = require("./connect");
require("dotenv").config()
const app = express();
const url = process.env.MONGO_URI;
const port = 8080;
// ...

    With:

    require("dotenv").config()
const express = require('express');
const mongoose = require('mongoose');
const connectDB = require("./connect");
const app = express();
const url = process.env.MONGO_URI;
const port = 8080;

    And this should solve process.env being in scope when connect.js is loaded.

    Login or Signup to reply.
  2. 0

    within your mongoDB atlas…
    in Network Access… edit IP access list
    switch it to “allow access from anywhere”

    Login or Signup to reply.
  3. 0

    Note: Please add below packages first

    npm i express, npm i dotenv, npm i mongoose

    **

    App.js (After Modification)

    **

    const express = require('express');
const mongoose = require('mongoose');
const connectDB = require("./connect");
require("dotenv").config()
const app = express();
const url = process.env.MONGO_URI;
const port = 8080;
// listen to server
const start =async () =>{
  try {
    
   await  connectDB(url);
    app.listen(port, () => {
      console.log("Connected To DB + App is listening on http://localhost:${port}");
    });
  } catch (error) {
    console.log(error);
    
  }
};

// call the start function
start();

    connect.js (After Modification)

    const mongoose = require('mongoose');

mongoose.set('strictQuery', true);
const connectDB = (url)=>{
    return  mongoose.connect(url)
}
module.exports = connectDB;

    enter image description here

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search