DB connection using mysql2

routes/dbconn2.js

+const mysql = require('mysql2')
+
+var env = process.env.NODE_ENV || 'testing';
+const config = require('../config/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
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