条形码生成优化

@@ -336,10 +336,9 @@ class Study extends Backend
             }
             $result = $this->model->allowField(true)->save($params);
             $id  = $this->model->id;
-            $unique = time();
             $sno = $this->model->sno;
             $barpath = Resource::StudyBar($sno);
-            $this->model->save(['barcode'=>$barpath,'unique'=>$unique],['id'=>$id]);
+            $this->model->save(['barcode'=>$barpath,'unique'=>$sno],['id'=>$id]);
             Db::commit();
         } catch (ValidateException|PDOException|Exception $e) {
             Db::rollback();