abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.'); // 添加商品规格描述字段到orders_invoice_item表 $this->addSql('ALTER TABLE orders_invoice_item ADD COLUMN item_spec_desc TEXT NULL COMMENT "商品规格描述" AFTER spec_info'); } /** * @param Schema $schema */ public function down(Schema $schema): void { // 回滚:删除商品规格描述字段 $this->addSql('ALTER TABLE orders_invoice_item DROP COLUMN item_spec_desc'); } }