extends schema in mongoose and nodejs

Question

i have some field and it reapet in all of my models.

i create a BaseSchema in in other file from my models:

const mongoose = require("mongoose");
const Schema = mongoose.Schema;
var util = require('util');

function BaseSchema() {
    Schema.apply(this, arguments);

  this.add({
    owner: { type:String },
    updateDate: { type: String },
    updateBy: { type: String },
    deleteDate: { type: String },
    deleteby: { type: String },
    createDate: { type: String },
    createBy: { type: String },
  });
}

util.inherits(BaseSchema, Schema);

and i use this BaseSchema in RoleSchema :

const mongoose = require("mongoose");
const schema = mongoose.Schema;
const BaseSchema = require("./baseEntity");

const RoleSchema = new BaseSchema.add({
  name: { type: String, require: true },
  description: { type: String },
  scurityStamp: { type: String, require: true },
});

RoleSchema.pre('save',()=>{
    scurityStamp='kianoush'
})
mongoose.model('Roles',RoleSchema);

but when i run the project it show me this error:

 const RoleSchema = new BaseSchema.add({
                   ^

TypeError: BaseSchema.add is not a constructor
    at Object.<anonymous> (F:\Projects\Nodejs\SalesSignal\src\entity\role.js:5:20)

whats the prboem? how can i solve this problem???

Answer 1

I think this can be simplified as you're basically trying to extend your BaseSchema :

import { model, Schema } from 'mongoose';

const BaseSchema = new Schema({
    owner: { type:String },
    updateDate: { type: String },
    updateBy: { type: String },
    deleteDate: { type: String },
    deleteby: { type: String },
    createDate: { type: String },
    createBy: { type: String },
});

const RoleSchema = new Schema({
  ...BaseSchema.obj,
  name: { type: String, required: true },
  description: { type: String },
  scurityStamp: { type: String, required: true },
});

// test
const RoleModel = mongoose.model('roles', RoleSchema);
const role = new RoleModel({ name: 'test', scurityStamp: 'test', owner: 'someOwner', createDate: new Date() });
await role.save();