Getting error when moving MongoDB (mongoose) uri to .env file

Question

I am using the MERN stack for my web app. My database is deployed to MongoDB Atlas. My code was working perfectly fine, but after I moved all the passwords and port numbers to a .env file. I got the below errors:

Here is my code:

const express = require("express");
const mongoose = require('mongoose');
const dotenv = require('dotenv').config();


const app = express();
const port = process.env.PORT;
const mydbURL = process.env.DB_URL;

mongoose.connect(mydbURL, {useNewUrlParser: true, useUnifiedTopology: true, useFindAndModify: true});

in the .env file:

PORT = 5000

DB_URL = mongodb+srv://username:password@name-of-cluster.aezwt.mongodb.net/name-of-db?retryWrites=true&w=majority

I am getting the following error:

(node:12580) UnhandledPromiseRejectionWarning: MongooseError: The uri parameter to openUri() must be a string, got "undefined". Make sure the first parameter to mongoose.connect() or mongoose.createConnection() is a string.

(node:12580) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode ). (rejection id: 1) (node:12580) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

My Question:

What might be a possible fix to the above error ?

Answer 1

试试这对我有用

dotenv.config({ path: path.join(__dirname, 'your env file path') });