Node.js mongoose中的保存功能不起作用

我有一个模式，当我试图更新数据库中的数组时，文件没有得到更新，数组总是空的。 当我在更新后打印文章时，它会打印带有我刚刚添加的一条注释的数组，但它不会保存在数据库中。 很可能是我没有将更新的文件正确保存到数据库中

这是我对你的评论

const Comment = require('../models/comment');
const Post = require('../models/post');

module.exports.create = function(req, res){
    Post.findById(req.body.postId, (err, post) => {
        //if the post is found
        if(post){
            Comment.create({
                content: req.body.comment,
                user: req.user._id,
                post: req.body.postId
            },
            (err, currcomment) => {
                if(err)
                    console.log(err);
                post.comment.push(currcomment);
                post.markModified('comment');
                post.save(function(err, doc) {
                    if (err) return console.error(err);
                    console.log("Document inserted succussfully!");
                  });
                    console.log(post);
                return res.redirect('/')
            }
            );
        }
        else{
            return res.redirect('/')
        }

    })
};

这是我的评论模式

const mongoose = require('mongoose');


const commentSchema = new mongoose.Schema(
    {
        content: {
            type: String,
            required: true
        },
        //comment belongs to a user
        user: {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'User'
        },
        post: {
            type: mongoose.Schema.Types.ObjectId,
            ref: 'Post'
        }
    },

    {timestamps: true}
);

const Comment = mongoose.model('Comment', commentSchema);

module.exports = Comment;
    

post.save（）发出此警告/错误

 Error: Post validation failed: comment: Cast to [undefined] failed for value "[{"_id":"5fc0dfec4c87ad723b06d6eb","content":"sadfasdf","user":"5fba3cbd01b2310b7aba868b","post":"5fc0de91fc0ca96fd0b331df","createdAt":"2020-11-27T11:15:56.991Z","updatedAt":"2020-11-27T11:15:56.991Z","__v":0}]" at path "comment"
    at ValidationError.inspect (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/error/validation.js:47:26)
    at formatValue (internal/util/inspect.js:491:31)
    at inspect (internal/util/inspect.js:189:10)
    at Object.formatWithOptions (util.js:84:12)
    at Console.(anonymous function) (console.js:196:15)
    at Console.warn (console.js:213:31)
    at /home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/controllers/comment_controller.js:19:45
    at /home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/model.js:4846:16
    at /home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/helpers/promiseOrCallback.js:16:11
    at /home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/model.js:4869:21
    at $__save.error (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/model.js:500:16)
    at /home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:246:48
    at next (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:167:27)
    at next (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:169:9)
    at Kareem.execPost (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:217:3)
    at _handleWrapError (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:245:21)
  errors:
   { comment:
      { ValidatorError: Cast to [undefined] failed for value "[{"_id":"5fc0dfec4c87ad723b06d6eb","content":"sadfasdf","user":"5fba3cbd01b2310b7aba868b","post":"5fc0de91fc0ca96fd0b331df","createdAt":"2020-11-27T11:15:56.991Z","updatedAt":"2020-11-27T11:15:56.991Z","__v":0}]" at path "comment"
          at _init (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/document.js:691:37)
          at init (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/document.js:657:5)
          at model.Document.$__init (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/document.js:586:3)
          at model.syncWrapper [as $__init] (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/kareem/index.js:234:23)
          at model.Document.init (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/document.js:545:8)
          at completeOne (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/query.js:2844:12)
          at model.Query.Query._completeOne (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/query.js:2073:7)
          at Immediate.Query.base.findOne.call (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mongoose/lib/query.js:2117:10)
          at Immediate.<anonymous> (/home/yuganksingh/me/Learn Full stack WEb-Dev/CODING NINJAS/Backend/instaKiloGram/node_modules/mquery/lib/utils.js:116:16)
          at runCallback (timers.js:705:18)
          at tryOnImmediate (timers.js:676:5)
          at processImmediate (timers.js:658:5)
        properties: [Object],
        kind: 'cast',
        path: 'comment',
        value:
         '[{"_id":"5fc0dfec4c87ad723b06d6eb","content":"sadfasdf","user":"5fba3cbd01b2310b7aba868b","post":"5fc0de91fc0ca96fd0b331df","createdAt":"2020-11-27T11:15:56.991Z","updatedAt":"2020-11-27T11:15:56.991Z","__v":0}]',
        reason: [CastError] } },
  _message: 'Post validation failed' }

错误：后期验证失败：注释：对值“[{”\u id:“5fc0dfec4c87ad723b06d6eb”，“内容”：“sadfasdf”，“用户”：“5FBA3CBD0B2310B7ABA868B”，“Post:“5fc0de91fc0ca96fd0b331df”，“createdAt:“2020-11-27T11:15:56.991Z”，“更新日期”：“2020-11-27T11:15:56.991Z”，“注释”路径处的“\u v:”0}”
在ValidationError.inspect（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakigg/node_modules/mongoose/lib/error/validation.js:47:26）
at formatValue（internal/util/inspect.js:491:31）
检查时（内部/util/inspect.js:189:10）
位于Object.formatWithOptions（util.js:84:12）
控制台上。（匿名函数）（Console.js:196:15）
在Console.warn（Console.js:213:31）
在/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakiggle/controllers/comment\u-controller.js:19:45
在/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node_-modules/mongoose/lib/model.js:4846:16
在/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/mongoose/lib/helpers/promiseOrCallback.js:16:11
在/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node_-modules/mongoose/lib/model.js:4869:21
在$\u save.error（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node\u modules/mongoose/lib/model.js:500:16）
在/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/kareem/index.js:246:48
下一步（/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node_-modules/kareem/index.js:167:27）
下一步（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/kareem/index.js:169:9）
在Kareem.execPost（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakigg/node_modules/Kareem/index.js:217:3）
at_handleWrapError（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/kareem/index.js:245:21）
错误：
{评论：
{ValidatorError:对值“[{”\u id:“5fc0dfec4c87ad723b06d6eb”，“内容”：“sadfasdf”，“用户”：“5FBA3CBD0B2310B7ABA868B”，“post:“5fc0de91fc0ca96fd0b331df”，“创建数据”：“2020-11-27T11:15:56.991Z”，“更新数据”：“2020-11-27T11:15:56.991Z”，“注释”路径处的“\u v:“0}]”
在_init（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakigg/node_modules/mongoose/lib/document.js:691:37）
在init（/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node_-modules/mongoose/lib/document.js:657:5）
在model.Document.$\u init（/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node\u-modules/mongoose/lib/Document.js:586:3）
在model.syncWrapper[as$\uu init]（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node\u modules/kareem/index.js:234:23）
在model.Document.init（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/mongoose/lib/Document.js:545:8）
在completeOne（/home/yuganksingh/me/Learn-Full-stack-WEb-Dev/CODING-NINJAS/Backend/instakikg/node_-modules/mongoose/lib/query.js:2844:12）
在model.Query.Query._completeOne（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/mongoose/lib/Query.js:2073:7）
在Immediate.Query.base.findOne.call（/home/yuganksingh/me/Learn Full stack WEb Dev/CODING NINJAS/Backend/instakikg/node_modules/mongoose/lib/Query.js:2117:10）
立即。
我希望您使用的是mongoose版本5.10.16，请将其更改为5.10.15。
检查此GitHub问题线程。
5.10.16已完全损坏。
我希望您使用的是mongoose版本5.10.16，请将其更改为5.10.15。
检查此GitHub问题线程。
5.10.16完全损坏。
我检查了package.json的“mongoose”：“^5.10.15”，请不要使用任何波浪号（~）和插入符号（^），只需执行package.json中的“mongoose”：“5.10.15”。同样的问题没有发生变化我检查了package.json的“mongoose”：“^5.10.15”，请不要使用任何波浪号（~）和插入符号（^），只需执行“mongoose”：“5.10.15”在package.json.json中，同样的问题没有发生变化