Node js : Entry into the error block only - mysql

Question

This is my app.js generated by express js while installing:
// catch 404 and forward to error handler
app.use(function(req, res, next) {
console.log("coming to this use func");
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
console.log("Dev request sent");
console.log(err.message);
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
console.log("testing this function");
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
// I wrote this code to detect '127.0.0.1:3000/enter' in the url
// correspondingly fetches questions from the database
app.post('/enter', function(req, res, next) {
console.log("Coming here.");
connection.query('SELECT * from questions_table', function(err, rows, fields) {
if (!err) {
console.log('The solution is: ', rows);
var myData = JSON.stringify(rows);
res.render('display', {myData:rows })
}
else {
console.log('Error while performing Query.');
res.render('display', { title: 'The index page!'})
}
});
});
The control never comes to the chunk that I wrote, rather it gets into the if loop that says :
if (app.get('env') === 'development')
ALWAYS and throws some error. Front end is a mere form submission. What am I doing wrong here?
Thanks in advance.