我正在尝试将我的googleID（对象）添加到另一个猫鼬模式的地图中。我对我的用户ID对象进行字符串化处理，然后在测试代码中抛出此错误：

(node:293528) UnhandledPromiseRejectionWarning: ValidationError: collection validation failed: likes.5dbf6205bdcd5e5f78536447: Cast to ObjectId failed for value "110840542851551561690" at path "likes.$*"
    at new ValidationError (C:\files\node_modules\mongoose\lib\error\validation.js:30:11)
    at model.Document.invalidate (C:\files\node_modules\mongoose\lib\document.js:2333:32)
    at Map.set (C:\files\node_modules\mongoose\lib\types\map.js:71:26)
    at C:\files\app.js:123:30
    at C:\files\node_modules\mongoose\lib\model.js:4589:16
    at C:\files\node_modules\mongoose\lib\query.js:4323:12
    at process.nextTick (C:\files\node_modules\mongoose\lib\query.js:2805:28)
    at process._tickCallback (internal/process/next_tick.js:61:11)
(node:293528) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block,or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:293528) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future,promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

client.js发出的我的发帖请求：

const likesForm = document.getElementById("test");
likesForm.addEventListener("submit",function (evt) {
  evt.preventDefault();
  console.log(event.target.id)
  const [likeString,itemId] = evt.target.id.split("-");
  vote(
    likeString === "like"
      ? "1"
      : "-1",itemId
  );
},false);

async function vote (voteInc,itemId) {
  const route = `/like/${itemId}`;

  const response = await fetch(route,{
      method: 'POST',body: JSON.stringify({"like": voteInc}),headers: {
        'Content-Type': 'application/json'
      }
  });

const result = await response.json();

console.log(result);
}

服务器端帖子：

app.post("/like/:id",(req,res)=>{
  const id = req.params.id;
  const like = req.body.like;
  console.log(like);
  console.log(id);
  if(req.isAuthenticated()){
    linkscr.user.findById(req.user.id,(e,foundUser)=>{
      if(e){
        console.log(e);
      }else{
        //if like = 1
        if(like==1){
            linkscr.collection.findById(id,function(error,result){
              if(error){
                console.log(error);
              }else{
                result.likes.set(foundUser._id.toString(),foundUser.googleId);
                result.save();
              }
            })
            console.log("not voted yet. Add 1 and added to like");
        }else{
          linkscr.collection.findById(id,result){
            if(error){
              console.log(error);
            }else{
              result.dislikes.set(foundUser._id.toString(),foundUser.googleId);
              result.save();
            }
          })
          console.log("not voted yet. Add 1 and added to dislike");   
        };
      };
    });
  }else{
    res.redirect("/");
  }
});

我的喜欢/不喜欢模式：

likes        : { 
  type: Map,of: { 
      type: mongoose.Schema.Types.ObjectId,ref: "User" }
    },dislikes     : { 
  type: Map,

最初保存模式的方式：

likes        : {[User._id]:User},dislikes     : {},

感谢所有帮助。你是我唯一的希望Stack！

我首先以为这是猫鼬的问题，我如何对待我的物体，但看起来这更多与异步工作有关。诚然，这是我编写本文时编程的最大弱点。

编辑：根据我在文档中所看到的内容，猫鼬不能仅将对象设置为字符串。猫鼬不能猫鼬。

编辑2：我的错是我在错误的位置输入了错误的ID。 foundUser._id.toString(),foundUser