JAVASCRIPT

add column sequelize

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

  },

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

sequelize add column existing model

sequelize migration:create --name Users

sequelize add column existing model

Add altering commands here.
Return a promise to correctly handle asynchronicity.

Example:
return queryInterface.createTable('users', { id: Sequelize.INTEGER });