how to define model in sequelize code example

Example: modele sequelize

module.exports = function (sequelize, DataTypes) { return sequelize.define('Locale', { id: { type: DataTypes.INTEGER, autoIncrement: true, primaryKey: true }, locale: { type: DataTypes.STRING, allowNull: false, unique: true, validate: { len: 2 } }, visible: { type: DataTypes.BOOLEAN, defaultValue: 1 } }) }