From 703326cdc2e6ad426c09cfbf7983f893552ac845 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Sat, 14 Aug 2010 19:14:49 -0700
Subject: [PATCH] defaulting values to a list

---
 lib/arel/nodes/update_statement.rb | 2 +-
 lib/arel/visitors/to_sql.rb        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/arel/nodes/update_statement.rb b/lib/arel/nodes/update_statement.rb
index 3df54bb3a9..9f069cddb3 100644
--- a/lib/arel/nodes/update_statement.rb
+++ b/lib/arel/nodes/update_statement.rb
@@ -6,7 +6,7 @@ module Arel
       def initialize
         @relation = nil
         @wheres   = []
-        @values   = nil
+        @values   = []
       end
     end
   end
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 9a9dd20d52..4c2a6a10e4 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -17,7 +17,7 @@ module Arel
           "UPDATE #{visit o.relation}",
           ("SET #{o.values.map { |column,value|
               "#{quote_column_name(column.name)} = #{quote visit value}"
-            }.join ', '}" if o.values),
+            }.join ', '}" unless o.values.empty?),
           ("WHERE #{o.wheres.map { |x| visit x }.join ' AND '}" unless o.wheres.empty?)
         ].compact.join ' '
       end