text: 'use strict';
  
  module.exports = {
      up: function (queryInterface, Sequelize) {
          /*
           Add altering commands here.
           Return a promise to correctly handle asynchronicity.
  
           Example:
           return queryInterface.createTable('users', { id: Sequelize.INTEGER });
           */
  
          return queryInterface.addIndex("weixin_users", ["unionid"])
  
      },
  
      down: function (queryInterface, Sequelize) {
          /*
           Add reverting commands here.
           Return a promise to correctly handle asynchronicity.
  
           Example:
           return queryInterface.dropTable('users');
           */
          return queryInterface.removeIndex('weixin_users', ["unionid"]);
      }
  };
  