thinkphp中事务操作的实例详解

 事务指的是访问并可能更新数据库中各种数据项的一个程序执行单元。文本主要给大家介绍的就是thinkPHP中事务操作的相关内容，感兴趣的朋友可以参考参考。
 
       1.说明
 
Db::startTrans();
try{
  操作；
  对象->save();
  Db::commit();
}
catch (Exception $ex) {
  Db::rollback();
  throw $ex;
}
 
       2.案例
 
private function createOrderByTrans($snap)
{
    Db::startTrans();
    try {
      $orderNo = $this->makeOrderNo();
      $order = new OrderModel();
      $order->user_id = $this->uid;
      $order->order_no = $orderNo;
      $order->total_price = $snap['orderPrice'];
      $order->total_count = $snap['totalCount'];
      $order->snap_img = $snap['snapImg'];
      $order->snap_name = $snap['snapName'];
      $order->snap_address = $snap['snapAddress'];
      $order->snap_items = json_encode($snap['pStatus']);
      $order->save();
      $orderID = $order->id;
      $create_time = $order->create_time;
      foreach ($this->oProducts as &$p) {
        $p['order_id'] = $orderID;
      }
      $orderProduct = new OrderProduct();
      $orderProduct->saveAll($this->oProducts);
      Db::commit();
      return [
        'order_no' => $orderNo,
        'order_id' => $orderID,
        'create_time' => $create_time
      ];
    } catch (Exception $ex) {
      Db::rollback();
      throw $ex;
    }
}
 
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