Heroku Error: Invalid schema, expected `mongodb` or `mongodb+srv` - node.js

Question

My app is able to connect to MongoDB locally but on heroku logs i'm getting this error:
Error: Invalid schema, expected mongodb or mongodb+srv
This is what my connection to mongodb looks like in my server.js file:
// // DB config
const db = require("./config/keys").mongoURI;
// // Connect to MongoDB
mongoose
.connect(db)
.then(() => console.log("MongoDB connected"))
.catch(err => console.log(err));
config/keys:
if (process.env.NODE_ENV === "production") {
module.exports = require("./keys_prod");
} else {
module.exports = require("./keys_dev");
}
keys_dev:
module.exports = {
mongoURI:
"mongodb://jenn123:jenn123#devconnect-shard-00-00-acrk4.mongodb.net:27017,devconnect-shard-00-01-acrk4.mongodb.net:27017,devconnect-shard-00-02-acrk4.mongodb.net:27017/test?ssl=true&replicaSet=devconnect-shard-0&authSource=admin&retryWrites=true",
secretOrKey: "secret"
};
keys_prod:
module.exports = {
mongoURI: "process.env.MONGO_URI",
secretOrKey: "process.env.SECRET_OR_KEY"
};
Any help is greatly appreciated

Answer 1

Well, you're doing the production keys wrong.
process.env is an object containing the env variables as key and their values.
so instead of putting them in a string, you gotta remove the string and treat it as an object. like below:
module.exports = {
mongoURI: process.env.MONGO_URI,
secretOrKey: process.env.SECRET_OR_KEY
};

Answer 2

This is typically how I connect with mongoose.
const mongoose = require('mongoose');
const dotenv = require('dotenv').config();
let db = mongoose.connection;
mongoose.connect('your connection URL here', {
auth: {
user: "Your username",
password: "Your password"
}
})
.then(() => {
console.log('connection successful')
db = mongoose.connection;
module.exports = db;
})
.catch((err) => {
console.error(err)
});
You can then use it in a file like so (this is assuming you've defined a job schema and are importing it):
const db = require('./db'); // provides the mongoDB connection
const mongoose = require('mongoose');
const ObjectId = require('mongoose').Types.ObjectId;
const Job = require('./schemas/jobs').Job
module.exports.createJob = function (newJob) {
const job = new Job(newJob);
return new Promise((resolve, reject) => {
job.save((err, data) => {
if (err) {
reject(err);
} else {
resolve(data);
}
});
});
};