From df67453309faea4faa855ddc7a02c4886734965e Mon Sep 17 00:00:00 2001
From: bhushan lodha <bhushanlodha@bhushans-MacBook-Pro-2.local>
Date: Mon, 17 Feb 2014 16:15:39 -0500
Subject: [PATCH] renames the primary key constraint on renaming table

---
 .../connection_adapters/postgresql/schema_statements.rb       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index ae8ede4b42d30..bb0a6ad5ac5bc 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -381,8 +381,10 @@ def rename_table(table_name, new_name)
           if seq == "#{table_name}_#{pk}_seq"
             new_seq = "#{new_name}_#{pk}_seq"
             execute "ALTER TABLE #{quote_table_name(seq)} RENAME TO #{quote_table_name(new_seq)}"
+            execute "ALTER TABLE #{new_name} DROP CONSTRAINT #{table_name}_pkey;"
+            execute "ALTER TABLE #{new_name} ADD PRIMARY KEY (#{pk});"
           end
-
+          
           rename_table_indexes(table_name, new_name)
         end