diff --git a/app/common/Implement/Repository/Mapper.php b/app/common/Implement/Repository/Mapper.php
index 0a15a6e..a8dc82b 100644
--- a/app/common/Implement/Repository/Mapper.php
+++ b/app/common/Implement/Repository/Mapper.php
@@ -1,6 +1,7 @@
 <?php
 namespace Incoviba\Common\Implement\Repository;
 
+use Error;
 use Closure;
 use Incoviba\Common\Define;
 
@@ -46,7 +47,11 @@ class Mapper implements Define\Repository\Mapper
     }
     public function hasDefault(): bool
     {
-        return isset($this->default);
+        try {
+            return isset($this->default) or $this->default === null;
+        } catch (Error) {
+            return false;
+        }
     }
 
     public function parse(Define\Model &$model, string $column, ?array $data): bool