laravel eloquent builder 加入分页

Question

我有这个查询从基于DISTINCT destination_tbls.destination 的两个表中返回数据 像下面这样：

SELECT DISTINCT
   destination_tbls.destination,
   MIN(sms_details.id),
   MIN(sms_details.msg_timestamp) AS TIMESTAMP,
   MIN(destination_tbls.count) 
FROM
   sms_details 
   JOIN
      (
         SELECT
            * 
         FROM
            destination_tbls
      )
      destination_tbls 
      ON destination_tbls.id = sms_details.destination_tbls_id 
GROUP BY
   destination_tbls.destination;

现在如何使用它们的分页， 我尝试了类似的方法，但不起作用：

DB::select('
SELECT DISTINCT destination_tbls.destination,MIN(sms_details.id),MIN(sms_details.msg_timestamp) AS TIMESTAMP,MIN(destination_tbls.count)
FROM sms_details
JOIN(SELECT * FROM destination_tbls) destination_tbls ON destination_tbls.id=sms_details.destination_tbls_id
GROUP BY destination_tbls.destination
')->simplePaginate(100);

任何帮助将不胜感激！

Answer 1

如果你想使用 laravel 的分页，你需要使用查询构建器方法编写查询。

$results = DB::table('sms_details')
    ->select('destination_tbls.destination')
    ->selectRaw('min(sms_details.id)')
    ->selectRaw('min(sms_details.msg_timestamp) as timestamp')
    ->selectRaw('min(destination_tbls.count)')
    ->distinct()
    ->joinSub(
        function ($sub) {
            $sub->from('destination_tbls');
        },
        'destination_tbls',
        function ($join) {
            $join->on('destination_tbls.id', '=', 'sms_details.destination_tbls_id');
        }
    )
    ->groupBy('destination_tbls.destination')
    ->simplePaginate(100);

由于您实际上并没有在子查询连接中做任何事情，因此您可以改为连接表。

$query = DB::table('sms_details')
    ->select('destination_tbls.destination')
    ->selectRaw('min(sms_details.id)')
    ->selectRaw('min(sms_details.msg_timestamp) as timestamp')
    ->selectRaw('min(destination_tbls.count)')
    ->distinct()
    ->join('destination_tbls', 'destination_tbls.id', '=', 'sms_details.destination_tbls_id')
    ->groupBy('destination_tbls.destination')
    ->simplePaginate(100);