import { Schema, model, Document } from 'mongoose'; const NotificationSchema = new Schema({ createTime: { type: Date, default: Date.now }, user: { type: Schema.Types.ObjectId, ref: 'User', }, token: { type: String, unique: true, }, }); export interface NotificationDocument extends Document { user: any; token: string; } const Notification = model( 'Notification', NotificationSchema, ); export default Notification;