Because :order => 'id DESC' is defined at 'has_many', there is no need to set 'order'. But, MySQL test fails. Sqlite3 and PostgreSQL pass. Is this MySQL bug? git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5091 e93f8b46-1217-0410-a6f0-8f06a7374b81