qimall/addons/Printer/console/migrations/M231226060556AlterQimallAddonsPrinter.php

<?php

namespace addons\Printer\console\migrations;

use yii\db\Migration;

/**
 * Class M231226060556AlterQimallAddonsPrinter
 */
class M231226060556AlterQimallAddonsPrinter extends Migration
{
    /**
     * {@inheritdoc}
     */
    public function safeUp()
    {
        $sql="ALTER TABLE qimall_addons_printer add print_width varchar(255) not null default '58mm' comment '打印宽度' ";
        $this->execute($sql);
    }

    /**
     * {@inheritdoc}
     */
    public function safeDown()
    {
        echo "M231226060556AlterQimallAddonsPrinter cannot be reverted.\n";

        return false;
    }

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

    }

    public function down()
    {
        echo "M231226060556AlterQimallAddonsPrinter cannot be reverted.\n";

        return false;
    }
    */
}