Question

该对象没问题，但是当我尝试访问某些属性时，属性具有未定义的值：

代码：

router.get('/setn', middleware.isLoggedIn, function(req, res){
  var aux = false;
  var arrayOfIds = req.user.following.toString();
  arrayOfIds = arrayOfIds.split(",");
  console.log("\n"+arrayOfIds+"\n");

  User.find({_id: {$in: arrayOfIds}}, function(err, foundUsers){
    if (err) {
       console.log(err);
       res.status(500).send("Error finding user.")
       return;
    }
    let origLength = req.user.notifications.length;

    foundUsers.forEach(function(foundUser){
      foundUser.notiSchemaSent.forEach(function(notiSchema, i){
        console.log("\n2\n");
        if(req.user.notifications.length === 0){
           req.user.notifications.unshift(notiSchema);
        } else {
          req.user.notifications.forEach(function(userNotification){
            console.log("\n UserSchema:\n"+userNotification.username+"\n");
            console.log("\n UserSchema Title:\n"+userNotification.title+"\n");
            console.log("\n UserSchema Image:\n"+userNotification.image+"\n");
            console.log("\n UserSchema Link:\n"+userNotification.link+"\n");

            console.log("\n ====================================\n");

            console.log("\n NotiSchema:\n"+notiSchema+"\n"); 

            // OBJECT PRINT
            //{ link: '5aa42e',
            //image: '/Imgs/seholoko.jpg',
            //title: 'Test',
            //username: 'anthonyslips' }

            console.log("\n NotiSchema Username:\n"+notiSchema.userName+"\n"); //Undefined
            console.log("\n NotiSchema Title:\n"+notiSchema.title+"\n"); //Test
            console.log("\n NotiSchema Image:\n"+notiSchema.image+"\n"); //Imgs/seholoko.jpg
            console.log("\n NotiSchema link:\n"+notiSchema.link+"\n"); //Undefined

            console.log("\n ====================================\n");

            if(userNotification.link!== notiSchema.link){
              req.user.notifications.unshift(notiSchema);
            }
          });
        }
      });
    });

    if (req.user.notifications.length !== origLength) {
      console.log("\n5\n");
        req.user.save(function(err) {
            if (err) {
                console.log(err);
                res.status(500).send("Error saving user notifications.")
            } else {
              console.log("\n6\n\n");
                res.json(req.user.notifications);
            }
        });
    } else {
      console.log("\n7\n\n");
        res.json(req.user.notifications);
    }
  });
});

我在代码中添加了一些注释，其中包含打印出来的值。我已经尝试使用JSON.stringify / parse，但我认为它不起作用，因为它已经是一个对象

我在这里缺少什么？

Answer 1

不确定与image的交易是什么，但username的问题是您的代码为notiSchema.userName而属性全部为小写：username: 'anthonyslips'。

对象属性未定义

1 个答案: