CODEWITHSUNDEEP
javascriptnode.jsmongodbexpress
joshk132
joshk132

Reputation: 1093

Adding value to variable not working just appending on

I am trying to take the quantity then add in the order number to it then resave the value of quantity. 

// update expendable quantity POST
  app.post('/dashboard/it/expendable/:id',
    setRedirect({auth: '/login', success: '/dashboard/it/expendable', failure: '/dashboard/it/expendable'}),
    isAuthenticated,
    (req, res, next) => {
      Expendable.findById(req.parms.id, function(err, expendable) {
        if (err) return (err);
        expendable.quantity = expendable.quantity + req.body.order;
        expendable.save(function(err) {
          if (err) return (err);
            req.flash('success', { msg: 'Expendable checked out.' });
            res.redirect(req.redirect.success);
        });
      });
      next();
    });

It currently just adds the req.body.order onto the end of the expendable.quantity instead of adding it to it numerically.

I don't see why it is not working, I have similar code using - and it works but but + doesn't. I did look on google to see and everything I found showed just to use var1 + var2.

I did check datatype and it is number and the input is a number type as well.

Upvotes: 2

Views: 431

Answers (1)

Stephen
Stephen

Reputation: 1099

I would parse them into numbers, it's most likely that one of them is a string and in that case, it appends: "5" + 5 = "55", "5" - 5 = 0

example of adding and minus with a string

Upvotes: 3

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