CODE EXAMPLE FOR JAVASCRIPT

add column sequelize

module.exports = {
  up: (queryInterface, Sequelize) => {
    return queryInterface.addColumn(
      'Todo',
      'completed',
      Sequelize.BOOLEAN
    );

  },

  down: (queryInterface, Sequelize) => {
    return queryInterface.removeColumn(
      'Todo',
      'completed'
    );
  }
}