RSpec does not work

[aamine]

Current implementation does not work with RSpec, because of fixture cleaning issue.
database_cleaner does not work, too.
Avoiding SAVEPOINT may resolve this problem.

[aamine]

Error message from ActiveRecord:

     ActiveRecord::StatementInvalid:
       PG::Error: ERROR:  SQL command "SAVEPOINT active_record_1" not supported.
       : SAVEPOINT active_record_1

It seems that ActiveRecord utilize nested save points, we cannot avoid SAVEPOINT...
database_cleaner (with truncation scheme) is the last resort.