diff --git a/handler/handler.py b/handler/handler.py
index 75a2df6..37c3742 100644
--- a/handler/handler.py
+++ b/handler/handler.py
@@ -37,7 +37,7 @@ class Handler(metaclass=ABCMeta):
         :return:
         """
         where = self.get_where()
-        coll = self.get_coll(appid=self._appid)
+        coll = self.get_coll(appid=self.appid)
         update_data = self._data.get('props', {})
         if update_data:
             update_data.update({