public function upgrade($old_version) { switch ($old_version) { case '1.0': $q = new w2p_Database_Query(); $q->addTable('resources'); $q->addField('resource_key', 'varchar(64) not null default ""'); $q->exec(); if (db_error()) { return false; } // FALLTHROUGH // FALLTHROUGH case '1.0.1': break; } return true; }