From 112cb940aa17a0979b9f6282c07ace2f6a0896c1 Mon Sep 17 00:00:00 2001
From: Max Holder <mxhold@gmail.com>
Date: Sat, 30 Aug 2014 13:58:18 -0400
Subject: Add SelectManager#distinct_on to set/unset Arel::Nodes::DistinctOn
 quantifier

---
 lib/arel/select_manager.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/arel/select_manager.rb')

diff --git a/lib/arel/select_manager.rb b/lib/arel/select_manager.rb
index 4a652f2c9c..5a05e7e181 100644
--- a/lib/arel/select_manager.rb
+++ b/lib/arel/select_manager.rb
@@ -155,6 +155,15 @@ module Arel
       self
     end
 
+    def distinct_on(value)
+      if value
+        @ctx.set_quantifier = Arel::Nodes::DistinctOn.new(value)
+      else
+        @ctx.set_quantifier = nil
+      end
+      self
+    end
+
     def order *expr
       # FIXME: We SHOULD NOT be converting these to SqlLiteral automatically
       @ast.orders.concat expr.map { |x|
-- 
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