diff --git a/server/plugin/saiadmin/basic/think/BaseModel.php b/server/plugin/saiadmin/basic/think/BaseModel.php
index 4b46dfc..3f8bb4d 100644
--- a/server/plugin/saiadmin/basic/think/BaseModel.php
+++ b/server/plugin/saiadmin/basic/think/BaseModel.php
@@ -128,7 +128,7 @@ class BaseModel extends Model implements ModelInterface
      */
     public static function onBeforeWrite($model): void
     {
-        if ($model->isUpdate()) {
+        if ($model->isExists()) {
             $updateTime = $model->updateTime ?? 'update_time';
             if ($updateTime) {
                 $model->set($updateTime, date('Y-m-d H:i:s'));