diff --git a/extend/base/common/provider/db/QueryBase.php b/extend/base/common/provider/db/QueryBase.php
index 71e9769..9ea591c 100644
--- a/extend/base/common/provider/db/QueryBase.php
+++ b/extend/base/common/provider/db/QueryBase.php
@@ -57,4 +57,13 @@ class QueryBase extends DbQuery
 
         return md5(json_encode($options));
     }
+
+    public function whereIf($where_condition, $field, $op = null, $condition = null)
+    {
+        if ($where_condition) {
+            $this->where($field, $op, $condition);
+        }
+
+        return $this;
+    }
 }