From db18f565e1e4e41522e04c31a7d60ff2f8ff52bd Mon Sep 17 00:00:00 2001
From: An Tao <antao2002@gmail.com>
Date: Sun, 22 Sep 2019 21:16:53 +0800
Subject: [PATCH] Fix bug when using 'is null' substatement in ORM (#250)

---
 orm_lib/inc/drogon/orm/Criteria.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/orm_lib/inc/drogon/orm/Criteria.h b/orm_lib/inc/drogon/orm/Criteria.h
index 8cd0774d..ad185f5f 100644
--- a/orm_lib/inc/drogon/orm/Criteria.h
+++ b/orm_lib/inc/drogon/orm/Criteria.h
@@ -153,6 +153,15 @@ class Criteria
                 break;
         }
     }
+    Criteria(const std::string &colName, CompareOperator &opera)
+        : Criteria(colName, (const CompareOperator &)opera)
+    {
+    }
+    Criteria(const std::string &colName, CompareOperator &&opera)
+        : Criteria(colName, (const CompareOperator &)opera)
+    {
+    }
+
     Criteria()
     {
     }