From 32fbb70f100d0d6f9800020ef519a09a0852ae47 Mon Sep 17 00:00:00 2001
From: Ernie Miller <ernie@metautonomo.us>
Date: Thu, 25 Mar 2010 20:18:36 -0400
Subject: Add grouped predicates (_any/_all) and refactored predication method
 definitions

---
 lib/arel/engines/sql/predicates.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'lib/arel/engines/sql')

diff --git a/lib/arel/engines/sql/predicates.rb b/lib/arel/engines/sql/predicates.rb
index e9a068fb13..53bac7a2ca 100644
--- a/lib/arel/engines/sql/predicates.rb
+++ b/lib/arel/engines/sql/predicates.rb
@@ -19,6 +19,24 @@ module Arel
     class And < CompoundPredicate
       def predicate_sql; "AND" end
     end
+    
+    class GroupedPredicate < Grouped
+      def to_sql(formatter = nil)
+        "(" + 
+          operands2.inject([]) { |predicates, operand|
+            predicates << operator.new(operand1, operand).to_sql
+          }.join(" #{predicate_sql} ") +
+        ")"
+      end
+    end
+    
+    class Any < GroupedPredicate
+      def predicate_sql; "OR" end
+    end
+    
+    class All < GroupedPredicate
+      def predicate_sql; "AND" end
+    end
 
     class Equality < Binary
       def predicate_sql
-- 
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