From 7de03ec765e3160f5331fc17c8d7d332fa679d62 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Wed, 11 Aug 2010 15:31:44 -0700
Subject: [PATCH] subtracting blank strings is slightly faster than blank?

---
 activerecord/lib/active_record/relation/query_methods.rb | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 0ea662f310..cd6c6f8d1f 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -135,9 +135,7 @@ def build_arel
 
       arel = build_joins(arel, @joins_values) unless @joins_values.empty?
 
-      @where_values.uniq.each do |where|
-        next if where.blank?
-
+      (@where_values - ['']).uniq.each do |where|
         case where
         when Arel::SqlLiteral
           arel = arel.where(where)
-- 
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