From 32c6c7aad44e58a88f9b627a2f38fd398f14426c Mon Sep 17 00:00:00 2001
From: Ryan McKinley <ryan@apache.org>
Date: Mon, 21 Mar 2011 20:23:39 +0000
Subject: [PATCH] SOLR-2423 don't add null copy fields

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1083934 13f79535-47bb-0310-9956-ffa450edef68
---
 solr/src/java/org/apache/solr/update/DocumentBuilder.java | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/solr/src/java/org/apache/solr/update/DocumentBuilder.java b/solr/src/java/org/apache/solr/update/DocumentBuilder.java
index 86108c60d1a..e78e18d3340 100644
--- a/solr/src/java/org/apache/solr/update/DocumentBuilder.java
+++ b/solr/src/java/org/apache/solr/update/DocumentBuilder.java
@@ -18,12 +18,10 @@
 package org.apache.solr.update;
 
 import java.util.ArrayList;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 
 import org.apache.lucene.document.Document;
-import org.apache.lucene.document.Field;
 import org.apache.lucene.document.Fieldable;
 import org.apache.solr.common.SolrDocument;
 import org.apache.solr.common.SolrException;
@@ -286,7 +284,7 @@ public class DocumentBuilder {
             Fieldable [] fields = destinationField.createFields(val, boost);
             if (fields != null) { // null fields are not added
               for (Fieldable f : fields) {
-                out.add(f);
+                if(f != null) out.add(f);
               }
             }
           }