From f0f6b7fb90b936cb78d786896598486821db6559 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Fri, 10 Sep 2010 16:58:19 -0700
Subject: adding not equal node, column names are expected to be symbols

---
 lib/arel/visitors/to_sql.rb | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'lib/arel/visitors')

diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 8638bf43c3..761f315763 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -159,7 +159,6 @@ module Arel
       def visit_Arel_Nodes_Equality o
         right = o.right
 
-        # FIXME: maybe we should visit NilClass?
         if right.nil?
           "#{visit o.left} IS NULL"
         else
@@ -167,6 +166,16 @@ module Arel
         end
       end
 
+      def visit_Arel_Nodes_NotEqual o
+        right = o.right
+
+        if right.nil?
+          "#{visit o.left} IS NOT NULL"
+        else
+          "#{visit o.left} != #{visit right}"
+        end
+      end
+
       def visit_Arel_Nodes_UnqualifiedColumn o
         "#{quote_column_name o.name}"
       end
-- 
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