node.js - 如何在模型中删除程序时自动删除与特定程序相关的所有评论

Question

我正在开发一个具有 aprogram model和 的应用program程序comments作为参考。我现在正在努力的是如何在删除时自动删除与comments特定相关的所有内容。我希望在 中完成此操作，因为我正在使用. 删除将从页面中进行。programprogrammodelAdminBroAdminAdmin

我尝试做这样的事情，但它不工作

这是我的Program model。

const mongoose = require("mongoose");
const programImageBasePath = "uploads/programImages";
const path = require("path");
require("dotenv").config();
const Schema = mongoose.Schema;
const ObjectId = Schema.ObjectId;

const programSchema = new mongoose.Schema({
  programtype: {
     type: String,
     required: true,
  },
     title: {
     type: String,
     required: true,
  },
     description: {
       type: String,
       required: true,
  },
  createdAt: {
     type: Date,
     required: true,
     default: Date.now,
  },
  programImage: {
     type: String,
     require: true,
  },

  programcomments: [{ type: Schema.Types.ObjectId, ref: "Programcomment" }],
});

programSchema.pre("remove", function (next) {
  Programcomment.remove({ programcomments: this._id }).exec();
  next();
});

programSchema.pre("deleteOne", function (next) {
  const programId = this.getQuery()["_id"];
   mongoose
     .model("Programcomment")
     .deleteMany({ program: programId }, function (err, result) {
        if (err) {
            console.log(`[error] ${err}`);
            next(err);
        } else {
            console.log("success");
            next();
        }
    });
 });

 module.exports = mongoose.model("Program", programSchema);
 module.exports.programImageBasePath = programImageBasePath;

标签： node.jsmongodbexpress