猫鼬中的保存功能不起作用
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【中文标题】猫鼬中的保存功能不起作用【英文标题】：The save function in mongoose not working 【发布时间】：2021-03-10 08:34:47 【问题描述】：我有一个架构，当我尝试更新数据库中的数组时，文件没有得到更新，并且数组始终为空。 当我在更新后打印帖子时，它会打印带有我刚刚添加的一条评论的数组，但它没有保存在数据库中。 很可能我没有将更新的文件正确保存到数据库中
这是我的comment_controller
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 cmets 架构
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() 给出了这个警告/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'
完整的代码在这里 https://github.com/YugankSingh/instaKiloGram
【问题讨论】：
【参考方案1】：希望你使用的是 mongoose 5.10.16 版本，请改成 5.10.15。 检查这个 GitHub 问题线程 https://github.com/Automattic/mongoose/issues/9585#issue-751097126。 5.10.16 彻底坏掉了。
【讨论】：
我检查了 package.json 它的 "mongoose": "^5.10.15", 请不要使用任何波浪号（~）和插入符号（^），只需在 package.json 中执行 "mongoose": "5.10.15" 即可。 出现同样的问题没有变化以上是关于猫鼬中的保存功能不起作用的主要内容，如果未能解决你的问题，请参考以下文章