Yii migrations dropTable and FK -

i have migration:

function up:

$this->createtable(             'vacancy_moderate',             array(                 'id' => 'int(10) unsigned not null auto_increment',                 'period_days' => 'tinyint(4) not null',                 'title' => 'varchar(255) not null default \'\'',                 'price'=> 'int(11) default null',                 'requirements'=> 'text not null',                 'conditions'=> 'text',                 'contact_details'=> 'text not null',                 'country_id'=> 'int(10) unsigned not null',                 'city_id'=> 'int(10) unsigned default null',                 'user_id'=> 'int(10) unsigned default null',                 'club_id'=> 'int(10) default null',                 'primary key (`id`)',                 'key `city_id` (`city_id`)',                 'key `user_id` (`user_id`)',                 'key `country_id` (`country_id`)',                 'key `club_id` (`club_id`)',                 'constraint `vacancy_moderate_ibfk_1` foreign key (`city_id`) references `city` (`id`) on update cascade',                 'constraint `vacancy_moderate_ibfk_2` foreign key (`user_id`) references `user` (`id`) on delete set null on update cascade',                 'constraint `vacancy_moderate_ibfk_3` foreign key (`country_id`) references `country` (`id`) on update cascade',                 'constraint `vacancy_moderate_ibfk_4` foreign key (`club_id`) references `clubs` (`id`) on update cascade'             ),             'engine=innodb default charset=utf8'         ); 

function down:

$this->droptable('vacancy_moderate'); 

question: should drop foreign keys manually or dropped within droptable?

they'll drop table, going away. :-)