From 6d6ed5532416aa75889cd34a669696ba640abeb5 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Tue, 3 Aug 2010 17:57:36 -0700
Subject: avoid passing AR::Base objects to Arel when we can

---
 activerecord/lib/active_record/relation/finder_methods.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'activerecord/lib/active_record')

diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index a192e044ea..bad9af250d 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -169,6 +169,8 @@ module ActiveRecord
     #   Person.exists?(['name LIKE ?', "%#{query}%"])
     #   Person.exists?
     def exists?(id = nil)
+      id = id.id if ActiveRecord::Base === id
+
       case id
       when Array, Hash
         where(id).exists?
-- 
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