php – Laravel查询生成器常规错误2031

以下是使用Laravel查询构建器的查询：

$begin = new DateTime('2016-07-01');
$end = new DateTime('2016-07-31');
$startDate = $begin->format('Y-m-d 00:00:00');
$endDate = $end->format('Y-m-d 23:59:59');
$deposit = $depositModel->select(DB::raw('user_deposit.user_id as user_id,sum(user_deposit.amount) as total_deposit,null as total_withdraw'))
                        ->whereBetween('date_time',[$startDate,$endDate])
                        ->where('user_deposit.status',1)
                        ->groupBy('user_deposit.user_id');
$withdraw = $withdrawModel->select(DB::raw('user_withdraw.user_id as user_id,null as total_deposit,sum(user_withdraw.amount) as total_withdraw'))
                        ->whereBetween('user_withdraw.created_at',$endDate])
                        ->where('user_withdraw.status',1)
                        ->groupBy('user_withdraw.user_id');
$deposit = $deposit->unionAll($withdraw);
$transaction = DB::table(DB::raw("({$deposit->toSql()}) t"))
                  ->select('user_id',DB::raw("sum(total_deposit) as total_deposit_amount,sum(total_withdraw) as total_withdraw_amount"))
                  ->groupBy('user_id')
                  ->get();

我希望得到如下结果：

"transaction": [
            {
                "user_id": 2,"total_deposit_amount": "101.00","total_withdraw_amount": "50.50"
            },{
                "user_id": 5,"total_deposit_amount": null,"total_withdraw_amount": "50.50"
            }
        ]

但后来我不断得到SQLSTATE [HY000]：一般错误：2031.所以我在查询上使用了sql()来获取原始的sql查询并试图在MySQL中运行它并且它产生了如上所述的预期结果.

下面是运行toSql()后的查询

SELECT`user_id`,SUM(total_deposit) AS total_deposit_amount,SUM(total_withdraw) AS total_withdraw_amount 
FROM (( SELECT user_deposit.user_id AS user_id,SUM(user_deposit.amount) AS total_deposit,null AS total_withdraw 
        FROM `user_deposit` 
        WHERE`date_time` BETWEEN '2016-07-01' AND '2016-07-31' 
        AND `user_deposit`.`status` = 1 
        GROUP BY `user_deposit`.`user_id`) 
        UNION ALL (SELECT user_withdraw.user_id AS user_id,null AS total_deposit,SUM(user_withdraw.amount) AS total_withdraw 
                   FROM `user_withdraw` 
                   WHERE `user_withdraw`.`created_at` BETWEEN '2016-07-01' AND '2016-07-31' 
                   AND `user_withdraw`.`status` = 1
                   GROUP BY `user_withdraw`.`user_id`)) t 
        GROUP BY `user_id`

所以问题是,我的查询构建器出了什么问题？为什么原始sql在查询构建器不工作时有效？

谢谢

mergeBindings($sub->getQuery())

我的代码：

$transaction = DB::table(DB::raw("({$deposit->toSql()}) t"))
                  ->mergeBindings($sub->getQuery())  // this is required for selecting from subqueries
                  ->select('user_id',sum(total_withdraw) as total_withdraw_amount"))
                  ->groupBy('user_id')
                  ->get();

（编辑：李大同）

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