From e773ca99f27a8051828ef29e170478ba8dc7e491 Mon Sep 17 00:00:00 2001
From: Hyonjee Joo <hjoo@users.noreply.github.com>
Date: Sat, 31 Jan 2015 18:13:39 -0800
Subject: changed deleted_tables list to set

---
 activerecord/lib/active_record/fixtures.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/activerecord/lib/active_record/fixtures.rb b/activerecord/lib/active_record/fixtures.rb
index fc7b2ec850..57db2faaff 100644
--- a/activerecord/lib/active_record/fixtures.rb
+++ b/activerecord/lib/active_record/fixtures.rb
@@ -1,6 +1,7 @@
 require 'erb'
 require 'yaml'
 require 'zlib'
+require 'set'
 require 'active_support/dependencies'
 require 'active_support/core_ext/digest/uuid'
 require 'active_record/fixture_set/file'
@@ -521,7 +522,7 @@ module ActiveRecord
           update_all_loaded_fixtures fixtures_map
 
           connection.transaction(:requires_new => true) do
-            deleted_tables = []
+            deleted_tables = Set.new 
             fixture_sets.each do |fs|
               conn = fs.model_class.respond_to?(:connection) ? fs.model_class.connection : connection
               table_rows = fs.table_rows
-- 
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