<?php

namespace UCore\Db;

use Illuminate\Support\Facades\DB;
use UCore\Helper\Logger;

/**
 * 数据库助手类
 */
class Helper
{

    /**
     * 检查是否已经开启事务
     * @throws \LogicException
     * @return void
     */
    static public function check_tr()
    {
        $level = DB::transactionLevel();
        if($level === 0){
            Logger::error("check_tr - transaction level is 0 没有开启事务");
            // 没有开启事务
            throw new \LogicException("transaction level is 0");
        }
        if($level > 1){
            // 事务嵌套
            Logger::error("check_tr - transaction level >1 事务嵌套 ");
            throw new \LogicException("transaction level > 1");
        }

    }


}