// NOTE: MySQL does not support transactional DDL (https://dev.mysql.com/doc/internals/en/transactions-notes-on-ddl-and-normal-transaction.html)
// You should use this with a (cool) DBMS such as PostgreSQL.

module.exports = {
    up: (queryInterface, Sequelize) => {
        return queryInterface.sequelize.transaction((t) => {
            return Promise.all([
                queryInterface.addColumn('table_name', 'column_name1', {
                    type: Sequelize.STRING
                }, { transaction: t }),
                queryInterface.addColumn('table_name', 'column_name2', {
                    type: Sequelize.STRING,
                }, { transaction: t })
            ])
        })
    },

    down: (queryInterface, Sequelize) => {
        return queryInterface.sequelize.transaction((t) => {
            return Promise.all([
                queryInterface.removeColumn('table_name', 'column_name1', { transaction: t }),
                queryInterface.removeColumn('table_name', 'column_name2', { transaction: t })
            ])
        })
    }
};