text: 
  
  module.exports = {
      up: (queryInterface, Sequelize) => queryInterface.addColumn(
          'posts', // name of Source model
          'servicesId', // name of the key we're adding
          {
              type: Sequelize.INTEGER,
              references: {
                  model: 'services', // name of Target model
                  key: 'id', // key in Target model that we're referencing
              },
              onUpdate: 'CASCADE',
              onDelete: 'SET NULL',
          },
      ),
  
      down: (queryInterface, Sequelize) => queryInterface.removeColumn(
          'posts', // name of Source model
          'servicesId', // key we want to remove
      ),
  };
  