请考虑以下3种模式和层次结构：一个项目有多个阶段，一个阶段有多个事件。 为了将新的阶段推入项目，我这样做：

Project.findOneAndUpdate(
      { slug: projectSlug },{ $push: { stages: myNewStage } },).then((post) => res.status(201).json({
      message: 'stage created successfully',data: post,})).catch((error) => {
      return res.status(500).json({
        code: 'SERVER_ERROR',description: 'something went wrong,Please try again',});
    });

但是，如何将新事件推入舞台？据我所知，子文档不具有与文档相同的属性（例如find，findAndUpdate）。

我的实际模式：

项目计划

const mongoose = require('mongoose');
const Stage = require('./Stages').model('Stages').schema;

const projectSchema = new mongoose.Schema({
  name: {
    type: String,required: true,},description: {
    type: String,slug: {
    type: String,trim: true,lowercase: true,unique: true,clientSlug: {
    type: String,stages: [Stage],startDate: {
    type: Date,endDate: {
    type: Date,required: false,{
    timestamps: true,});

module.exports = mongoose.model('Projects',projectSchema);

阶段模式

const mongoose = require('mongoose');
const Event = require('./Events').model('Events').schema;

const stageSchema = new mongoose.Schema({
  name: {
    type: String,projectSlug: {
    type: String,events: [Event],});

module.exports = mongoose.model('Stages',stageSchema);

活动计划

const mongoose = require('mongoose');
const Comment = require('./Comments').model('Comments').schema;

const eventSchema = new mongoose.Schema({
  _id: {
    type: String,userEmail: {
    type: String,text: {
    type: String,imgUrl: {
    type: String,documentUrl: {
    type: String,stageSlug: {
    type: String,comments: [Comment],});

module.exports = mongoose.model('Events',eventSchema);