From e3461239adfa972de8f25a2bc6b48b4a8aa62c9c Mon Sep 17 00:00:00 2001
From: Carl Lerche <carllerche@mac.com>
Date: Thu, 11 Mar 2010 16:13:47 -0800
Subject: Start writing integration specs for arel.

---
 lib/arel/algebra/relations/operations/where.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/arel')

diff --git a/lib/arel/algebra/relations/operations/where.rb b/lib/arel/algebra/relations/operations/where.rb
index 608aaeb4b7..2fc51c7f24 100644
--- a/lib/arel/algebra/relations/operations/where.rb
+++ b/lib/arel/algebra/relations/operations/where.rb
@@ -9,6 +9,15 @@ module Arel
       @predicate = predicate.bind(@relation)
     end
 
+    def engine
+      # Temporary check of whether or not the engine supports where.
+      if relation.engine.respond_to?(:supports) && !relation.engine.supports(:where)
+        Memory::Engine.new
+      else
+        relation.engine
+      end
+    end
+
     def wheres
       @wheres ||= (relation.wheres + [predicate]).collect { |p| p.bind(self) }
     end
-- 
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