From 5005bbe62b955c1665dc09485edd46d0b8497185 Mon Sep 17 00:00:00 2001
From: Thomas <thomas.rabaix@soleoweb.com>
Date: Mon, 2 Apr 2012 14:55:35 +0300
Subject: [PATCH] In some weird situation the SimpleXmlIterator used to iterate
 on the ``$xmlRoot->field`` property just get resetted. This solution avoid
 this situation. This problem occurs when Symfony2 warms up cache with
 autogenerate proxy to ``true``

---
 lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index 70a530046..3b2e54ac4 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -166,6 +166,9 @@ class XmlDriver extends AbstractFileDriver
             $metadata->table['options'] = $this->_parseOptions($xmlRoot->options->children());
         }
 
+        // The mapping assignement is done in 2 times as a bug might occurs on some php/xml lib versions
+        // The internal SimpleXmlIterator get resetted, to this generate a duplicate field exception
+        $mappings = array();
         // Evaluate <field ...> mappings
         if (isset($xmlRoot->field)) {
             foreach ($xmlRoot->field as $fieldMapping) {
@@ -213,10 +216,14 @@ class XmlDriver extends AbstractFileDriver
                     $mapping['options'] = $this->_parseOptions($fieldMapping->options->children());
                 }
 
-                $metadata->mapField($mapping);
+                $mappings[] = $mapping;
             }
         }
 
+        foreach ($mappings as $mapping) {
+             $metadata->mapField($mapping);
+        }
+        
         // Evaluate <id ...> mappings
         $associationIds = array();
         foreach ($xmlRoot->id as $idElement) {