PostgreSQL: correctly quote the ' in pk_and_sequence_for. Closes #5462.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4580 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* PostgreSQL: correctly quote the ' in pk_and_sequence_for. #5462 [tietew@tietew.net]
+
 * PostgreSQL: correctly quote microseconds in timestamps. #5641 [rick@rickbradley.com]
 
 * Clearer has_one/belongs_to model names (account has_one :user). #5632 [matt@mattmargolis.net]

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -303,7 +303,7 @@ def pk_and_sequence_for(table)
           # the 8.1+ nextval('foo'::regclass).
           # TODO: assumes sequence is in same schema as table.
           result = query(<<-end_sql, 'PK and custom sequence')[0]
-            SELECT attr.attname, name.nspname, split_part(def.adsrc, '\\\'', 2)
+            SELECT attr.attname, name.nspname, split_part(def.adsrc, '''', 2)
             FROM pg_class       t
             JOIN pg_namespace   name ON (t.relnamespace = name.oid)
             JOIN pg_attribute   attr ON (t.oid = attrelid)