From bdabedfe7055ee17e053b4eccc03855a439807cc Mon Sep 17 00:00:00 2001
From: Daz Oakley <do2@sanger.ac.uk>
Date: Wed, 16 Feb 2011 11:48:05 +0000
Subject: [PATCH] Minor bugfix - you can't .downcase a true/false value...

---
 lib/biomart/dataset.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/biomart/dataset.rb b/lib/biomart/dataset.rb
index 2d3593f..175fc01 100644
--- a/lib/biomart/dataset.rb
+++ b/lib/biomart/dataset.rb
@@ -251,9 +251,10 @@ def dataset_xml( xml, dataset, args )
               raise Biomart::ArgumentError, "The filter '#{name}' does not exist" if dataset.filters[name].nil?
               
               if dataset.filters[name].type == 'boolean'
-                if [true,'included','only'].include?(value.downcase)
+                value = value.downcase if value.is_a? String
+                if [true,'included','only'].include?(value)
                   xml.Filter( :name => name, :excluded => '0' )
-                elsif [false,'excluded'].include?(value.downcase)
+                elsif [false,'excluded'].include?(value)
                   xml.Filter( :name => name, :excluded => '1' )
                 else
                   raise Biomart::ArgumentError, "The boolean filter '#{name}' can only accept 'true/included/only' or 'false/excluded' arguments."