add some permession

app/Nova/Resources/System/Roles/Permission.php

@@ -32,6 +32,13 @@ class Permission extends Resource
         'id', 'name',
     ];
 
+    /**
+     * Indicates if the resource should be displayed in the sidebar.
+     *
+     * @var bool
+     */
+    public static $displayInNavigation = false;
+
     /**
      * Get the fields displayed by the resource.
      */

app/Nova/Resources/System/Roles/Role.php

@@ -48,6 +48,19 @@ class Role extends Resource
         return __('Role');
     }
 
+    /**
+     * Build an "index" query for the given resource.
+     *
+     * @param  \Illuminate\Database\Eloquent\Builder  $query
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public static function indexQuery(NovaRequest $request, $query)
+    {
+        $query->where('name', '!=', 'king');
+
+        return $query;
+    }
+
     /**
      * Get the fields displayed by the resource.
      */