From 3a36df69b7b8913d333b508da0a6b6cdb68bc6f5 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Thu, 9 Sep 2010 09:27:29 -0700
Subject: Table#join will noop when nil is passed

---
 lib/arel/table.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib/arel')

diff --git a/lib/arel/table.rb b/lib/arel/table.rb
index ac832ed2b3..58e0c46959 100644
--- a/lib/arel/table.rb
+++ b/lib/arel/table.rb
@@ -35,6 +35,8 @@ module Arel
     end
 
     def join relation, klass = Nodes::InnerJoin
+      return tm unless relation
+
       sm = SelectManager.new(@engine)
       case relation
       when String, Nodes::SqlLiteral
-- 
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