如何停止执行NodeJ的其余代码？

Question

How would you stop the rest of the code from executing in NodeJs (not termine the application with process.exit() just say this is the last line to be executed).

In regular javascript you have exit(), but that doesnt seem to work in nodejs.

Below is the situation:

 connection.query(sql, [req.session.sessionUserPackagePassword] , function(err, rows, fields) {
   if (!err) {
     var userFound = false;
     for(var i=0; i< rows.length; i++) {
       // Make the comparaison case insensitive
       if ((rows[i].deliveredToUser).toLowerCase() == `no`) {
         userFound = true;
         console.log(userFound);
         [...]
     }
}
if (!userFound) {
  res.render('pickup/errorAlreadyDelivered', {});
  // exit here
}

console.log(userFound);

// If the query fails to execute
} else {
  console.log('Error while performing Query.');
  res.render('errorConnection', {});
}
});
connection.end();




  // Update the query to say the box has been delivered to user and specify time



 // Establish the connection
 [...]


    res.render('pickup/openPackageClose', {
          title: '',
          helpButtonURL: '/help/help-dropPackage',
          helpButtonTitle: 'Help'


      });



    });

Essentially when this condition is met, I would like the rest of the code not to be executed

if (!userFound) {
        res.render('pickup/errorAlreadyDelivered', {});
        // exit here 
}

Answer 1

connection.end(); then return; seems like it might work for you.

Answer 2

So based on your comment on my other answer, it sounds like your program structure isn't what I thought it was. This should work:

connection.query(sql, [req.session.sessionUserPackagePassword] , function(err, rows, fields) {
   if (!err) {
     var userFound = false;
     for(var i=0; i< rows.length; i++) {
       // Make the comparaison case insensitive
       if ((rows[i].deliveredToUser).toLowerCase() == `no`) {
         userFound = true;
         console.log(userFound);
         [...]
     }
}

if (!userFound) {
  res.render('pickup/errorAlreadyDelivered', {});
  connection.end();
} else { 
  console.log(userFound);
  console.log('Error while performing Query.');
  res.render('errorConnection', {});
  connection.end();
}