dbconn2.js

const mysql = require('mysql2')

var env = process.env.NODE_ENV || 'testing';
const config = require('./config')[env]

// ==== USER ACOOUNT DB CONNECTION ====
var userConnection = mysql.createConnection({
    host: config.database.host,
    user: config.database.user,
    password: config.database.password,
    port: config.database.port,
    database: config.database.dbUser,
    multipleStatements: true
})

userConnection.connect(function(err) {
    if (err) throw err;
})
userConnection.query('USE '+config.database.dbUser)

// ALTERNATIVE approach: close db connection manually after every query
/*
var dbconn = function dbconn(query, values, next) {
    var connection = mysql.createConnection({
        host: config.database.host,
        user: config.database.user,
        password: config.database.password,
        port: config.database.port,
        database: config.database.db
    })
    connection.connect(function(err) {
        if (err) throw err;
    })
    connection.query(query, values, function(err) {
        connection.end(); // close the connection
        if (err) {
            throw err;
        }
        // Execute the callback
        next.apply(this, arguments);
    });
}
*/

// ==== PROJECT DB CONNECTION ====
var projectConnection = mysql.createConnection({
    host: config.database.host_project,
    user: config.database.user,
    password: config.database.password,
    port: config.database.port,
    database: config.database.dbProject
})

projectConnection.connect(function(err) {
    if (err) throw err;
})
projectConnection.query('USE '+config.database.dbProject)

var connection = {
    user: userConnection,
    project: projectConnection
}

module.exports = connection