From da776f964ce4cd601d301a77d0c9cbfdd1eba686 Mon Sep 17 00:00:00 2001
From: Sergey Ivashchenko <serg.ivashchenko@gmail.com>
Date: Thu, 25 Feb 2016 13:27:15 +0000
Subject: [PATCH] Fixed exporting grid collection with id starting from zero

 - Fixed Ui Export Search Result Iterator for zero keys
---
 app/code/Magento/Ui/Model/Export/SearchResultIterator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/code/Magento/Ui/Model/Export/SearchResultIterator.php b/app/code/Magento/Ui/Model/Export/SearchResultIterator.php
index aa584c3f7e7e3..b0ce047ef46bc 100644
--- a/app/code/Magento/Ui/Model/Export/SearchResultIterator.php
+++ b/app/code/Magento/Ui/Model/Export/SearchResultIterator.php
@@ -58,6 +58,6 @@ public function rewind()
      */
     public function valid()
     {
-        return (bool)$this->key();
+        return !is_null($this->key());
     }
 }