update

@@ -86,10 +86,10 @@ class RankDataController extends BaseController
             foreach ($item['position'] as $date => $position){
             foreach ($item['position'] as $date => $position){
                 $item[$date] = $position;
                 $item[$date] = $position;
             }
             }
-            if(isset($item['img_position'])){
+            if(!empty($item['img_position'])){
                 $img_position = true;
                 $img_position = true;
             }
             }
-            if(isset($item['video_position'])){
+            if(!empty($item['video_position'])){
                 $video_position = true;
                 $video_position = true;
             }
             }
         }
         }