mongoose.connect(), first argument should be String, received undefined

Question

I am trying to set the test database for the testing purpose, but its not working.

I am trying to connect to mongodb using mongoose, but finding problem in connection er

Answer 1

In the server directory,

1. npm install dotenv
   

2. In your server.js: If you use "type":"module" in your package.json file then,

   import dotenv from 'dotenv';
   import mongoose from 'mongoose'; 
   dotenv.config();
   

   or,

   const mongoose = require('mongoose')
   require('dotenv').config()
   

3. Add a .env file in the server directory,

   PORT=5000
   MONGO_URL= yourURL
   

4. In the server.js,

   const url = process.env.MONGO_URL
   mongoose.connect(url, { useNewUrlParser: true, useUnifiedTopology: true })
   .then(() => app.listen(PORT, () => console.log("Server up and running!")
   .catch((error) => console.log(error.message) 
   mongoose.set('useFindAndModify', false)