router.post('/register', (req, res, next) => {
var subjectsID = [];
if (req.body.hasOwnProperty('subjects')) {
console.log("Teacher have subjects");
for (var i = 0; i < req.body.subjects.length; i++) {
Subject.getSubjectByName(req.body.subjects[i], (error, subject) => {
if (error) throw error;
if (!subject) {
res.json({
success: false,
msg: "One of the entered subjects dosent exist",
subject: req.body.subjects[i],
error: error
});
} else{
console.log("Subject by id : " + subject._id + " is verified");
subjectsID.push(subject._id);
}
});
}
console.log("All subjects verified");
console.log(subjectsID);
}
My Main problem is : When I enter info to this URL , I get the console.log("All subjects verified"); before I get the subjectsID.push(subject._id); So in the next code segment(not posted) the array is empty and I cant pull the needed info for it. How can I fix it so it will do the for loop first and only then will proceed to the next code segment.
Sub Question : when I enter a subject that isnt in the DB (mongoDB,mongoose) The line subject: req.body.subjects[i] shutdown my program with the error : Can't set headers after they are sent. I'm sure its connected to my main question ,so a basic explanation will be welcomed.
