Expressjs: Open view after foreach with mysql result. - mysql

Question

I'm trying to loop with a result from a mysql query and execute a new query in that loop. After looping thru the results I want to open a new view with the result of the first and second query.
Now my problem: The looping al works and I can open the new view, but when opening the view I only get the result of the first query and part of the second query, it opens the view before running the second query another time.
My code:
function getActivitiesDate(req,res, rows)
{
var rows2 = [];
rows.forEach(function getoutput(item) {
console.log("getActivitiesDate openend");
connectionpool.getConnection(function(err, connection3) {
console.log('Trying to connect to activities date');
if (!err) {
console.log('Trying to execute query for activities now'),
connectionpool.query('SELECT * FROM CALENDAR_ACTIVITY WHERE ACTIVITY_ID =' + connection3.escape(item.ACTIVITY_ID),
function (err, rows2) {
if (err) {
console.error(err);
res.statusCode = 500;
res.send({
result: 'error',
err: err.code
});
connection3.release();
console.log('It doesnt work error 500');
}
if (rows2.length == 0) {
res.render('index', {title: 'Index - Calendar Activity not found'});
}
console.log('Show activities + dates');
// connection3.release();
});
} else {
console.error('CONNECTION error: ', err);
res.statusCode = 503;
res.send({
result: 'error',
err: err.code
});
console.log('It does not work...');
}
});
});
console.log('This is the result of rows2Result: ');
console.log(rows2);
res.render('viewUserActivities', {activities:rows, activityDates:rows2 , title: 'Created activities'});
}
the "rows" attribute contains 2 rows for the moment (this could be more, or less, that's why I have the "rows.forEach") but I'm not sure how to pass the result of "rows2" to the new view AFTER it's looped thru the foreach loop for every result.
Any help would be greatly appreciated. I've it's not clear, or you need more information don't hesitate to ask.

Answer 1

I do not have sufficient rep to comment so I might be misinterpreting the question, but can you render the view after the forEach callback has finished?
Like so:
function getActivitiesDate(req,res, rows)
{
var rows2 = [];
rows.forEach(function getoutput(item) {
console.log("getActivitiesDate openend");
connectionpool.getConnection(function(err, connection3) {
console.log('Trying to connect to activities date');
if (!err) {
console.log('Trying to execute query for activities now'),
connectionpool.query('SELECT * FROM CALENDAR_ACTIVITY WHERE ACTIVITY_ID =' + connection3.escape(item.ACTIVITY_ID),
function (err, rows2) {
if (err) {
console.error(err);
res.statusCode = 500;
res.send({
result: 'error',
err: err.code
});
connection3.release();
console.log('It doesnt work error 500');
}
else if (rows2.length == 0) {
res.render('index', {title: 'Index - Calendar Activity not found'});
} else {
console.log('This is the result of rows2Result: ');
console.log(rows2);
res.render('viewUserActivities', {activities:rows, activityDates:rows2 , title: 'Created activities'});
console.log('Show activities + dates');
}
// connection3.release();
});
} else {
console.error('CONNECTION error: ', err);
res.statusCode = 503;
res.send({
result: 'error',
err: err.code
});
console.log('It does not work...');
}
});