UserModel.js

import mongoose from 'mongoose';

const { ObjectId } = mongoose.Schema.Types;

const Schema = new mongoose.Schema(
  {
    name: {
      type: String,
      trim: true,
      index: true,
    },
    email: {
      type: String,
      index: true,
      lowercase: true,
      trim: true,
    },
    manager: {
      type: ObjectId,
      ref: 'User',
      description: 'Manager of this user',
      required: false,
      index: true,
    }
  },
  {
    timestamps: {
      createdAt: 'createdAt',
      updatedAt: 'updatedAt',
    },
    collection: 'User',
  },
);

const UserModel = mongoose.model('User', Schema);

export default UserModel;