How to connecting multiple database mongodb in nodejs server

Today i will try to share about  "How to connecting multiple database mongodb in nodejs server", so let see and try to anlyzing script below :

db.js

const mongoose = require('mongoose')

const MONGO_URI =

    'mongodb+srv://owlhacking:mypassword@cluster0.ls5sgez.mongodb.net/qrCodeData?retryWrites=true&w=majority'

const MOBILE_URI =

    'mongodb+srv://owlhacking:mypassword@cluster0.lpqs0es.mongodb.net/Cluster0?retryWrites=true&w=majority'

const connectDBs = () => {

    try {

        const qrCodeDb = mongoose.createConnection(MONGO_URI, {

            useUnifiedTopology: true,

            useNewUrlParser: true

        })

        const userDB = mongoose.createConnection(MOBILE_URI, {

            useUnifiedTopology: true,

            useNewUrlParser: true

        })

        return { qrCodeDb, userDB }

    } catch (error) {

        console.error(`Error:${error.message}`)

        process.exit(1)

    }

}

module.exports = { connectDBs }

model.js

const { default: mongoose } = require('mongoose')

const { connectDBs } = require('../config/db')

const qrSchema = mongoose.Schema({

    qrInformation: {

        type: String,

        required: true

    },

    qrImage: {

        type: String,

        required: true

    },

    timeStamp: {

        type: String,

        default: Date()

    }

})

const userSchema = new mongoose.Schema({

    fullname: {

        type: String,

        required: true

    },

    email: {

        type: String,

        required: true,

        unique: true

    },

    password: {

        type: String,

        required: true

    }

})

const { qrCodeDb, userDB } = connectDBs()

module.exports = {

    userSchema: userDB.model('user', userSchema),

    Qrcode: qrCodeDb.model('Qrcode', qrSchema)

}

Hope this information can helping you. Thanks

Source : https://gist.github.com/hackinf0/4f97a6a7e820cb612e0ff5c39139d08f