node.js - 如何引用与 mongoose 中的类型相同的架构

Question

这个问题已经有答案了:

Recursive elements in Schema : Mongoose modelling (1 个回答)

已关闭 3 年前。

我有一个评论列表对象，用于存储评论，无论谁回复该评论，它都会存储在子级中

{
    "_id": "5dbc479babc1c22683b73cf3",
    "comment": "wow .. this is awsome",
    "children": [
      {
        "_id": "5dbc481ec3bb512780ebda22",
        "comment": "second child",
        "children": [
          {
            "_id": "5dbc481ec3bb512780ebda22",
            "comment": "hi darling",
            "children": [],
            "user": {
              "_id": "5dbb81c8c597533bf4c38e75",
              "username": "arunkavale",
              "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/johnsmithagency/128.jpg"
            },
            "updatedDate": "2019-11-01T14:58:38.188Z",
            "createdDate": "2019-11-01T14:58:38.188Z"
          }
        ],
        "user": {
          "_id": "5dbb81c8c597533bf4c38e75",
          "username": "arunkavale",
          "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/johnsmithagency/128.jpg"
        },
        "updatedDate": "2019-11-01T14:58:38.188Z",
        "createdDate": "2019-11-01T14:58:38.188Z"
      },
      {
        "_id": "5dbc481ec3bb512780ebda22",
        "comment": "yep",
        "children": [],
        "user": {
          "_id": "5dbb81c8c597533bf4c38e75",
          "username": "arunkavale",
          "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/johnsmithagency/128.jpg"
        },
        "updatedDate": "2019-11-01T14:58:38.188Z",
        "createdDate": "2019-11-01T14:58:38.188Z"
      }
    ],
    "user": {
      "_id": "5dbb9683b44bfa2a3dce55bd",
      "username": "mayank",
      "avatar": "https://s3.amazonaws.com/uifaces/faces/twitter/alxndrustinov/128.jpg"
    },
    "createdDate": "2019-11-01T14:56:27.580Z",
    "updatedDate": "2019-11-01T14:58:38.188Z",
    "__v": 0
  }

这是我设计的架构

var mongoose = require('mongoose');


let UserSchema = new mongoose.Schema({
    username:{
        type:String
    },
    avatar:{
        type:String
    }
 });


 var ChildrenSchema = new mongoose.Schema({
    "comment":{
        type:String
    },
    parentId:{
        type: mongoose.Schema.Types.ObjectId,
    },
    children:{
        type:[ChildrenSchema]
    },
    user:{
        type:UserSchema
    }
 },{timestamps: { createdAt: 'createdDate', updatedAt: 'updatedDate' }});






let CommentSchema = new mongoose.Schema({
    user:{
        type:UserSchema,
    },
   "comment":{
       type:String
   },
   children:{
       type:[ChildrenSchema]
   }
},{timestamps: { createdAt: 'createdDate', updatedAt: 'updatedDate' }});


var Comment = mongoose.model('Comment', CommentSchema);
module.exports = {Comment};

在这里，我试图为 children 提供相同的ChildrenSchema类型，但它不起作用，它抛出 { CastError: Cast to嵌入失败的值“{ comment:\'hi darling\',\n kids: [],\n 用户:\n { _id:\'5dbb81c8c597533bf4c38e75\',\n 用户名:\'arunkavale\',\n 头像:\n\' https://s3.amazonaws.com/uifaces/faces/twitter/johnsmithagency/128.jpg\' } }"位于路径“children 错误..我不知道如何做到这一点。请帮助我

Answer 1

修改子文档数组的定义方式如下并尝试

   children:[ChildrenSchema]