urfatBro/app/geo/city/db/Migrate.php

<?php

use Schema\Wrapper as Wrapper;
use App\Core\Sanity\MigratorController as Migrator;

function geo_city_upgrade($pluginversion) {
    if ($pluginversion < "0.0.1") {
        $table = Wrapper::get_table("geo_cities");        
        $table->addColumn("state_id",    "integer", Array("null" => false));
        $table->addColumn("country_id",  "integer", Array("null" => false));
        $table->addColumn("code",        "integer", Array("null" => true));
        $table->addColumn("name",        "string",  Array("null" => false));
        $table->addColumn("description", "text",    Array("null" => true));
        $table->addTimestamps();
        $table->addSoftDelete();        
        $table->addForeignKey('state_id',   Wrapper::get_table('geo_states'));
        $table->addForeignKey('country_id', Wrapper::get_table('geo_countries'));
        $table->create();

        Wrapper::exec(file_get_contents(__DIR__.'/001_seed_rs_cities.sql') );
        
        Migrator::getInstance()->update_plugin_version("geo_city", "1.0.0");
        return;
    }

    //if ($pluginversion < "0.0.2") {
        //$table = Wrapper::get_table("geo_city");
        //Migrator::getInstance()->update_plugin_version("geo_city", "1.0.1");
        //return;
    //}
}

function geo_city_rollback($pluginversion) {
    if($pluginversion > "0.0.1"){
        $table = Wrapper::get_table("geo_cities");
        $table->drop();
        return;
    }
}