diff --git a/application/admin/controller/general/Attachment.php b/application/admin/controller/general/Attachment.php
index 2963a099..3b749b5b 100644
--- a/application/admin/controller/general/Attachment.php
+++ b/application/admin/controller/general/Attachment.php
@@ -42,7 +42,7 @@ class Attachment extends Backend
             $filter = $this->request->request('filter');
             $filterArr = (array)json_decode($filter, true);
             if (isset($filterArr['category']) && $filterArr['category'] == 'unclassed') {
-                $filterArr['category'] = '';
+                $filterArr['category'] = ',unclassed';
                 $this->request->get(['filter' => json_encode(array_diff_key($filterArr, ['category' => '']))]);
             }
             if (isset($filterArr['mimetype']) && preg_match("/[]\,|\*]/", $filterArr['mimetype'])) {
@@ -153,6 +153,7 @@ class Attachment extends Backend
         if ($category && !isset($categoryList[$category])) {
             $this->error(__('Category not found'));
         }
+        $category = $category == 'unclassed' ? '' : $category;
         \app\common\model\Attachment::where('id', 'in', $ids)->update(['category' => $category]);
         $this->success();
     }
diff --git a/application/common/model/Attachment.php b/application/common/model/Attachment.php
index c4540bc0..4c047819 100644
--- a/application/common/model/Attachment.php
+++ b/application/common/model/Attachment.php
@@ -19,6 +19,21 @@ class Attachment extends Model
         'thumb_style'
     ];
 
+    protected static function init()
+    {
+        // 如果已经上传该资源，则不再记录
+        self::beforeInsert(function ($model) {
+            if (self::where('url', '=', $model['url'])->where('storage', $model['storage'])->find()) {
+                return false;
+            }
+        });
+        self::beforeWrite(function ($row) {
+            if (isset($row['category']) && $row['category'] == 'unclassed') {
+                $row['category'] = '';
+            }
+        });
+    }
+
     public function setUploadtimeAttr($value)
     {
         return is_numeric($value) ? $value : strtotime($value);
@@ -69,21 +84,11 @@ class Attachment extends Model
      */
     public static function getCategoryList()
     {
-        $data = config('site.attachmentcategory')??[];
+        $data = config('site.attachmentcategory') ?? [];
         foreach ($data as $index => &$datum) {
             $datum = __($datum);
         }
         $data['unclassed'] = __('Unclassed');
         return $data;
     }
-
-    protected static function init()
-    {
-        // 如果已经上传该资源，则不再记录
-        self::beforeInsert(function ($model) {
-            if (self::where('url', '=', $model['url'])->where('storage', $model['storage'])->find()) {
-                return false;
-            }
-        });
-    }
 }
diff --git a/public/assets/js/backend/general/attachment.js b/public/assets/js/backend/general/attachment.js
index 70e87eaa..7e296ed8 100644
--- a/public/assets/js/backend/general/attachment.js
+++ b/public/assets/js/backend/general/attachment.js
@@ -24,7 +24,7 @@ define(['jquery', 'bootstrap', 'backend', 'form', 'table'], function ($, undefin
                     [
                         {field: 'state', checkbox: true},
                         {field: 'id', title: __('Id')},
-                        {field: 'category', title: __('Category'), formatter: Table.api.formatter.label, searchList: Config.categoryList},
+                        {field: 'category', title: __('Category'), operate: 'in', formatter: Table.api.formatter.label, searchList: Config.categoryList},
                         {field: 'admin_id', title: __('Admin_id'), visible: false, addClass: "selectpage", extend: "data-source='auth/admin/index' data-field='nickname'"},
                         {field: 'user_id', title: __('User_id'), visible: false, addClass: "selectpage", extend: "data-source='user/user/index' data-field='nickname'"},
                         {field: 'preview', title: __('Preview'), formatter: Controller.api.formatter.thumb, operate: false},
@@ -147,7 +147,7 @@ define(['jquery', 'bootstrap', 'backend', 'form', 'table'], function ($, undefin
                     [
                         {field: 'state', checkbox: multiple, visible: multiple, operate: false},
                         {field: 'id', title: __('Id')},
-                        {field: 'category', title: __('Category'), formatter: Table.api.formatter.label, searchList: Config.categoryList},
+                        {field: 'category', title: __('Category'), operate: 'in', formatter: Table.api.formatter.label, searchList: Config.categoryList},
                         {field: 'admin_id', title: __('Admin_id'), formatter: Table.api.formatter.search, visible: false},
                         {field: 'user_id', title: __('User_id'), formatter: Table.api.formatter.search, visible: false},
                         {field: 'url', title: __('Preview'), formatter: Controller.api.formatter.thumb, operate: false},