优化CURD代码生成关联

app/admin/controller/crud/Crud.php

@@ -581,6 +581,13 @@ class Crud extends Backend
 
     private function parseModelMethods($field, &$modelData): void
     {
+        // MySQL bigint/int 时间戳字段：显式声明为 integer，避免 ThinkORM 自动时间戳写入 'now' 字符串
+        if (in_array($field['name'] ?? '', ['create_time', 'update_time', 'createtime', 'updatetime'], true)
+            && in_array($field['type'] ?? '', ['int', 'bigint'], true)
+        ) {
+            $modelData['fieldType'][$field['name']] = 'integer';
+        }
+
         if (($field['designType'] ?? '') == 'array') {
             $modelData['fieldType'][$field['name']] = 'json';
         } elseif (!in_array($field['name'], ['create_time', 'update_time', 'updatetime', 'createtime'])