qimall/console/migrations/M231116112354AlterQimallPosterCode.php

<?php

namespace app\migrations;

use yii\db\Migration;

/**
 * Class M231116112354AlterQimallPosterCode
 */
class M231116112354AlterQimallPosterCode extends Migration
{
    /**
     * {@inheritdoc}
     */
    public function safeUp()
    {
        $sql = "ALTER TABLE `qimall_poster_code` MODIFY COLUMN `content` text CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '二维码参数';";
        $this->execute($sql);
    }

    /**
     * {@inheritdoc}
     */
    public function safeDown()
    {
        echo "M231116112354AlterQimallPosterCode cannot be reverted.\n";

        return false;
    }

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

    }

    public function down()
    {
        echo "M231116112354AlterQimallPosterCode cannot be reverted.\n";

        return false;
    }
    */
}