From bcf73b8c482ef07dc6f037dd4acc41ebc2e36bec Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Wed, 11 Aug 2010 15:02:19 -0700
Subject: use empty? over all?

---
 lib/arel/algebra/relations/relation.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/arel/algebra/relations/relation.rb b/lib/arel/algebra/relations/relation.rb
index 9807cfb984..765d6fe930 100644
--- a/lib/arel/algebra/relations/relation.rb
+++ b/lib/arel/algebra/relations/relation.rb
@@ -118,7 +118,7 @@ module Arel
     end
 
     %w{
-        having group order project
+        having group order
     }.each do |op|
       class_eval <<-OPERATION, __FILE__, __LINE__
           def #{op}(*args)
@@ -127,6 +127,10 @@ module Arel
       OPERATION
     end
 
+    def project *args
+      args.empty? ? self : Project.new(self, args)
+    end
+
     def where clause = nil
       clause ? Where.new(self, Array(clause)) : self
     end
-- 
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