<?php

use yii\db\Schema;
use yii\db\Migration;

class  extends Migration
{
    public function safeUp()
    {
        $tableOptions = '';
$connection=Yii::$app->db;
$transaction=$connection->beginTransaction();
try{
$transaction->commit();
} catch (Exception $e) {
echo 'Catch Exception '.$e->getMessage().' and rollBack this';
    $transaction->rollBack();
}
    }

    public function safeDown()
    {
$connection=Yii::$app->db;
$transaction=$connection->beginTransaction();
try{
$transaction->commit();
} catch (Exception $e) {
echo 'Catch Exception '.$e->getMessage().' and rollBack this';
$transaction->rollBack();
}
    }
}