ptb-be/model/backup.model.js

const mongoose = require('mongoose')
const { Schema, Types } = mongoose
const dokumen = require('./dokumen.model')

module.exports = mongoose.model(
    'Backup',
    new Schema({
        dokumen: [{ type: Types.ObjectId, ref: dokumen }]
    }, {
        timestamps: true,
    }),
    'backup'
)