主义为什么这个查询返回0行？

$q = Doctrine_Query::create()
    ->select(\'id\')
    ->from(\'Comment\')
    ->where(\"active=\'?\' AND object_id=\'?\' AND group_name = \'?\'\"
            , array(1, 1, \'unit\'));

SELECT c.id AS c__id, c.group_name AS c__group_name, c.name AS c__name,
       c.email AS c__email
  FROM comment c
 WHERE (c.active = \'?\' AND c.object_id = \'?\' AND c.group_name = \'?\')

bindings: 1, 1, unit

id user_id object_id group_name name  active
1   0      1         unit       test  1

phpmyadmin

SELECT * FROM comment WHERE active=1 AND object_id=1 AND group_name=\'unit\'

where(\"active=? AND object_id=? AND group_name = ?\"

named parameters

where(\"active= :ative AND object_id= :object_id AND group_name = :group_name\"
      , array(\':ative\'=>1, \':objet_id\'=>1, \'group_name\'=>\'unit\')\"