CODEWITHSUNDEEP
node.jsmongodbexpressmongoose
mandip prajapati
mandip prajapati

Reputation: 11

**ERROR*** TypeError: Cannot read property 'replace' of undefined

I am facing this TypeError: "Cannot read property 'replace' of undefined" when I made a small application with nodejs, express.js, MongoDB, mongoose and when I connect my express applications with mongoose at that time when I replace my password I face this type of error

const mongoose = require('mongoose');

const dotenv = require('dotenv');

const app = require('./app');

dotenv.config({ path: './config.env' });

const DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD
);

mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
  })
  .then((con) => {
    console.log(con.connections);
    console.log('DB connection succesful!!');
  });

const port = process.env.PORT || 3001;

app.listen(port, (req, res) => {
  console.log(`App is running on ${port}...`);
});

How to resolve this error?

Upvotes: 1

Views: 2304

Answers (5)

udara
udara

Reputation: 1

I also have the same issue and I solved it run the whole command in one line, like this:

node .\development\data\import-data.js

Upvotes: 0

tonydn
tonydn

Reputation: 45

The issue comes from your path that point to file config.env. You should keep config.env the same folder with the file that you want to execute. An example is below:

enter image description here

Hope that solves your issue.

Upvotes: 0

ravi maurya
ravi maurya

Reputation: 11

  1. Cannot read property because there is an error to read your config.env file, to check that
console.log(process.env);
// use thie before const DB to check file is accessible

If you access to .env now check DATABASE and DATABASE_PASSWORD is mentioned correctly.

  1. If everything is written correct then there is problem with your password to correct your password by customise it and don't use special character.

    2.1 to reset password of mongoDB Atlas cluster got to DATABASE ACCESS click on it now it will show your user, at right end click to edit.

    2.2 now popup open, edit your password and save it. and got config.env file change it.

  2. IN config.env file contain and check these should be written correctly. DATABASE url you get from atlas just copy and paste it just replace password to PASSWORD. thats it.

NODE_ENV=development
PORT=8000
DATABASE=mongodb+srv://***USER_name***:<PASSWORD>@cluster0.awemngr.mongodb.net/***DATABASENAME***?retryWrites=true&w=majority
DATABASE_PASSWORD= your_password

Upvotes: 0

Prosenjit Barman
Prosenjit Barman

Reputation: 81

The issue usually occurs due to not assigning the environment configuration file path properly. Pay attention to the dotenv.config({ path: './config.env' }); line. You are searching for the config.env file within the current folder. Make sure that the file exists on the current working directory. If not, assign the path of the config file properly. The issue will be solved right after that.

Upvotes: 1

shailesh kumar
shailesh kumar

Reputation: 11

I got the same error and i resolved by correcting my config.env file where

DATABASE = mongodb+srv://shailesh:@cluster0.n1pjr.mongodb.net/natours?retryWrites=true/majority?

I removed characters after true/ i.e. Majority.

However if this does not solve your problem then just ensure that Database is registered as an environment variable. Because error pertains to the issue that application is not able to find environment variable called "DATABASE"

Upvotes: 0

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