如何在查询完成后运行代码？

Question

我有以下代码：

var userFound = false;
let sql = `SELECT box_id, cubby_id, comport, deliveredToUser
           FROM recipients
           WHERE package_password = ?`;
connection.query(sql, [req.session.sessionUserPackagePassword],
                      function(err, rows, fields) {
    if (!err) {
        for (var i = 0; i < rows.length; i++) {
            // Make the comparaison case insensitive
            if ((rows[i].deliveredToUser).toLowerCase() == `no`) {
                userFound = true;
                console.log(userFound);
                var comport = rows[i].comport;
                var command = "open" + rows[i].cubby_id;
                var commandClose = "close" + rows[i].cubby_id;
                var commandStatus = "status" + rows[i].cubby_id;
                console.log(command);
                console.log(comport);
                var options = {
                    scriptPath: 'python/scripts',
                    // pass arguments to the script here    
                    args: [command, comport, commandClose, commandStatus] 
                };
                PythonShell.run('controlLock.py', options, function(err, results) {
                    if (err) {
                        res.render('errorConnection', {});
                    }
                    console.log('results: %j', results);
                });
            }
        }
        console.log(userFound);
        // If the query fails to execute
    } else {
        console.log('Error while performing Query.');
        res.render('errorConnection', {});
    }
});
connection.end();
if (!userFound) {
    //
    res.render('pickup/errorAlreadyDelivered', {});
    connection.end();
}

我希望只有在查询完成后才能运行此部分：

if (!userFound) {
    //
    res.render('pickup/errorAlreadyDelivered', {});
    connection.end();
}
console.log("connection ended " + userFound);

我在查询之外放置了console.log并在底部，尽管查询值更改为true，但它首先打印出false，然后首先出现，因为{{1}没有等到查询完成才能存储值。