我无法加入Yajara数据表laravel中的两个表

Question

我需要在父母数据表中列出学生姓名

• 这样的错误显示

DataTables警告：表id = parents-table-Ajax错误。有关此错误的更多信息，请参见http://datatables.net/tn/7

1。这是我父母的数据表查询部分

public function query(StudentParents $model)
    {
        $data = DB::table('studentparents')
        ->leftJoin('students', 'StudentParents.student_id', '=', 'students.id')
        ->select('studentparents.*','students.firstname as student_firstname','students.lastname as student_lastname')
        ->get();
        //echo ($data);
        return $data;
       // return $model->newQuery();
    }

2.controller

public function index(StudentParentsDataTable $dataTable)
    {

        return $dataTable->render('master/parents/parentsview');
    }