diff --git a/Kwf/Rest/Controller/Model.php b/Kwf/Rest/Controller/Model.php
index <HASH>..<HASH> 100644
--- a/Kwf/Rest/Controller/Model.php
+++ b/Kwf/Rest/Controller/Model.php
@@ -87,6 +87,8 @@ class Kwf_Rest_Controller_Model extends Kwf_Rest_Controller
 
     protected function _applySelectQuery($select, $query)
     {
+        $query = trim($query);
+        if (!$query) return;
         $ors = array();
         if (!$this->_queryColumns) {
             throw new Kwf_Exception("_queryColumns are required");
skip query select if query is empty