将值添加到变量不工作只是追加

Z时代
2024-01-10
分类：问答

我想采取quantity然后将order号码添加到它然后重新保存值quantity。将值添加到变量不工作只是追加

// 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(); 
    });