From 60887b8a42d022cfa217aee856bf7ff617d40925 Mon Sep 17 00:00:00 2001
From: Jeremy Goecks <jeremy.goecks@emory.edu>
Date: Wed, 22 Aug 2012 14:42:05 -0400
Subject: [PATCH] Add data placeholders so that BED files without all optional
 fields can be dynamically filtered.

---
 lib/galaxy/visualization/tracks/data_providers.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/galaxy/visualization/tracks/data_providers.py b/lib/galaxy/visualization/tracks/data_providers.py
index 64363b4dac6..a170758cad5 100644
--- a/lib/galaxy/visualization/tracks/data_providers.py
+++ b/lib/galaxy/visualization/tracks/data_providers.py
@@ -484,6 +484,11 @@ class BedDataProvider( TracksDataProvider ):
 
             # Score (filter data)    
             if length >= 5 and filter_cols and filter_cols[0] == "Score":
+                # If dataset doesn't have name/strand/thick start/thick end/blocks, 
+                # add placeholders. There should be 8 entries if all attributes 
+                # are present.
+                payload.extend( [ None for i in range( 8 - len( payload ) ) ] )
+
                 try:
                     payload.append( float( feature[4] ) )
                 except: