diff --git a/application/api/controller/Production.php b/application/api/controller/Production.php
index 9e22a22..20ca2bf 100644
--- a/application/api/controller/Production.php
+++ b/application/api/controller/Production.php
@@ -1176,7 +1176,8 @@ class Production extends Base
             $list[] = $data['article_id'];
             sort($list);
         }
-        $this->production_article_obj->where("p_article_id",$data['p_article_id'])->update(['related'=>json_encode(self::repalecArray($list))]);
+        $l = self::repalecArray($list);
+        $this->production_article_obj->where("p_article_id",$data['p_article_id'])->update(['related'=>count($l)>0?json_encode($l):'']);
         return jsonSuccess($list);
     }
 
@@ -1263,7 +1264,8 @@ class Production extends Base
         if($key!==false){
             unset($list[$key]);
         }
-        $this->production_article_obj->where("p_article_id",$data['p_article_id'])->update(['topics'=>json_encode(self::repalecArray($list))]);
+        $l = self::repalecArray($list);
+        $this->production_article_obj->where("p_article_id",$data['p_article_id'])->update(['topics'=>count($l)>0?json_encode($l):'']);
         return jsonSuccess(['list'=>$list]);
     }