接口优化

@@ -156,7 +156,7 @@ class Bind extends Api
         if (empty($unique) && empty($items_id)) {
             $this->error('参数错误', ['status' => 2]);
         }
-        $study = db('study')->where('unique', $unique)->field('id,grade,name,sno,team_id,earn_score')->find();
+        $study = db('study')->where('unique', $unique)->field('id,grade_id,name,sno,team_id,earn_score')->find();
         $item = db('item')->where('id', $items_id)->field('score,title,campus_id')->find();
         $team = \db('team')->where('id', $study['team_id'])->field('title,score')->find();
         $sum1 = $team['score'] + $item['score'];    //合计战队总分