laravel 模型查询按照whereIn排序的示例

实例如下所示：

$ids = [5,7,3,1,2];$data = Content::whereIn('id',$ids)    ->select('id')    ->get();//查询结果是想按照wherein的顺序排序//正确写法$data = Content::whereIn('id',$ids)    ->select('id')//   ->orderBy(DB::raw('FIND_IN_SET(id, "' . implode(",", $ids) . '"' . ")"))//   ->orderBy(DB::raw("FIND_IN_SET(id, '" . implode(',', $ids) . "'" . ')'))//   ->orderByRaw("FIND_IN_SET(id, '" . implode(',', $ids) . "'" . ')')    ->orderBy(DB::raw('FIND_IN_SET(id, "' . implode(",", $ids) . '"' . ")"))    ->get();

中午没睡觉一直调试，心塞...

错误写法

//错误写法$data = Content::whereIn('id',$ids)    ->select('id')    ->orderByRaw("FIND_IN_SET('id', "' . implode(",", $ids) . '"' . ")")    ->get();//该写法查询顺序是按照id大小正序排序

原因解析

//正确写法的sql语句为select `id` from `contents`order by FIND_IN_SET(id, "5,6,7,4,2,1") asc//错误写法的sql语句为select `id` from `contents`order by 'FIND_IN_SET(id, "5,6,7,4,2,1")' asc//或者select `id` from `contents`order by `FIND_IN_SET(id, "5,6,7,4,2,1")` asc //FIND_IN_SET()方法外面不要添加任何符号