How to set up environment variables on Heroku?

Question

When I deploy Node.js API on Heroku it gives me a wrong response .

res.json({"user":user,"auth-token":token});

localhost:3000/auth/login

{
"user": {
 "email": "name1@gmail.com",
 "username": "name1",
 "fullname": "fullname 1"
},
"auth-token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyaWQiOiI1ZjMxN2I0OTFhZTc4YzFjOWNjMjZjZWUiLCJ1c2VybmFtZSI6Im5pa2hpbGt1bWEiLCJmdWxsbmFtZSI6Ik5pa2hpbCBrdW1hciBTaW5naCIsImlhdCI6MTU5ODI0OTA3M30"
}

After deploy on heroku

name.herokuapp.com/auth/login

{
"user": {
 "email": "name1@gmail.com",
 "username": "name1",
 "fullname": "fullname 1"
}
}

Looks like `token` is falsy, and thus it is removed from the final response. Can you check whether the JWT token generation is working correctly when you deploy on heroku? — Anand Undavia, Aug 24 '20 at 07:12
@PrathameshMore thanks. Problem arise due to I use jwt secret key mention in .env file `jwt.verify(token,process.env.JWT_SECRET_KEY);` when I just replace with simple string `jwt.verify(token,"sdfahflkhow8e90fr980");` its working correctly . — Nikhil kumar, Aug 24 '20 at 07:42
Hey, I added a solution! Don't upload .env file on Heroku. Heroku has `Config Vars`. — Prathamesh More, Aug 24 '20 at 10:04
Please read [ask]. Your question says _nothing_ about environment variables outside of your title. Asking a clear question is the best way to improve your chances of getting a useful answer. — ChrisGPT was on strike, Aug 25 '20 at 00:13
@Nikhilkumar Could you accept a solution so other developers would easily find this useful. — Prathamesh More, Aug 25 '20 at 17:17

score 3 · Accepted Answer · answered Aug 24 '20 at 10:02

Follow the following steps

Install package called dotenv

npm install dotenv

Load that module in the main file where you using like environment variable. e.g process.env.PORT

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

Now log in to Heroku account
Go to your project dashboard
Got to settings tab
Now add your environment variables here

Now put your JWT_SECRET_KEY key and value to the next textbox there.

Note: Put same names in here like .env file

Hope that will work!

How to set up environment variables on Heroku?

1 Answers1