const Sequelize = require('sequelize'); const Model = Sequelize.Model; module.exports = (sequelize) => { class Phone extends Model { static associate(db) { Phone.belongsTo(db.Person, {onDelete: 'cascade'}); }; } Phone.init({ number: Sequelize.STRING, type: Sequelize.ENUM('home', 'work') }, {sequelize, modelName: 'Phone'}); return Phone };