qimall/addons/Certificate/console/migrations/M240708095911CertificateTableAddMemberLevelColumn.php

<?php

namespace addons\Certificate\console\migrations;

use yii\db\Migration;

/**
 * Class M240708095911CertificateTableAddMemberLevelColumn
 */
class M240708095911CertificateTableAddMemberLevelColumn extends Migration
{
    /**
     * {@inheritdoc}
     */
    public function safeUp()
    {
        $sql = <<<SQL
ALTER TABLE `qimall_addons_certificate` 
ADD COLUMN `member_level` varchar(255) NOT NULL DEFAULT '' COMMENT '允许保存及查看此证书的用户等级';
SQL;
        $this->execute($sql);
    }

    /**
     * {@inheritdoc}
     */
    public function safeDown()
    {
        return false;
    }

    /*
    // Use up()/down() to run migration code without a transaction.
    public function up()
    {

    }

    public function down()
    {
        echo "M240708095911CertificateTableAddMemberLevelColumn cannot be reverted.\n";

        return false;
    }
    */
}