= 2）'; UPDATE qimall_addons_double_copy_user SET upgrade_boss_at = upgrade_level_at WHERE level >= 2; 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 "M250509070016AlterDoubleCopyUserTable cannot be reverted.\n"; return false; } */ }