From 7b8944cb7662509d7ba6869ff571518ac7f848ea Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Wed, 8 Sep 2010 14:36:10 -0700
Subject: adding a sum node

---
 lib/arel/attributes/attribute.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/arel/attributes')

diff --git a/lib/arel/attributes/attribute.rb b/lib/arel/attributes/attribute.rb
index 464d78188a..af9bbdd478 100644
--- a/lib/arel/attributes/attribute.rb
+++ b/lib/arel/attributes/attribute.rb
@@ -12,6 +12,10 @@ module Arel
       def count distinct = false
         Nodes::Count.new [self], distinct
       end
+
+      def sum
+        Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
+      end
     end
 
     class String  < Attribute; end
-- 
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