From 63ca297eae471d6db72d793ff180e668b6117dcc Mon Sep 17 00:00:00 2001
From: geemus <geemus@gmail.com>
Date: Tue, 8 Nov 2011 09:13:53 -0600
Subject: [PATCH] [core] toss out nil-value keys when checking required
 credentials

closes #587
---
 lib/fog/core/service.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/fog/core/service.rb b/lib/fog/core/service.rb
index 876aba6fb..9196de2c1 100644
--- a/lib/fog/core/service.rb
+++ b/lib/fog/core/service.rb
@@ -176,7 +176,13 @@ module Fog
       end
 
       def validate_options(options)
-        missing = requirements - options.keys
+        keys = []
+        for key, value in options
+          unless value.nil?
+            keys << key
+          end
+        end
+        missing = requirements - keys
         unless missing.empty?
           raise ArgumentError, "Missing required arguments: #{missing.join(', ')}"
         end