用户报考考试筛选

@@ -49,7 +49,7 @@ class ThirdStudy extends Backend
             {
                 return $this->selectpage();
             }
-            list($where, $sort, $order, $offset, $limit) = $this->buildparams();
+            list($where, $sort, $order, $offset, $limit) = $this->buildparams(['id','user.username','study.examname']);
             $total = $this->model
                     ->with(['user','study'])
                     ->where($where)