Doctrine2本機查詢ManyToMany

Question

我已經閱讀了有關本地SQL查詢的Doctrine2文檔。 它沒有談論通過ManyToMany關系加入的實體。 任何想法或示例，我都沒有弄清楚如何處理。

Answer 1

您只需要手動將聯接表添加到sql中即可。 擴展《教義》手冊第14章中的示例：

$rsm = new ResultSetMapping;
$rsm->addEntityResult('User', 'u');
$rsm->addFieldResult('u', 'id', 'id');
$rsm->addFieldResult('u', 'name', 'name');
$rsm->addJoinedEntityResult('Address' , 'a', 'u', 'address');
$rsm->addFieldResult('a', 'address_id', 'id');
$rsm->addFieldResult('a', 'street', 'street');
$rsm->addFieldResult('a', 'city', 'city');

$sql = 'SELECT u.id, u.name, a.id AS address_id, a.street, a.city FROM users u ' .
       'INNER JOIN address__user j ON u.id = j.user '.
       'INNER JOIN address a ON a.id = j.address '.
       'WHERE u.name = ?';
$query = $this->_em->createNativeQuery($sql, $rsm);
$query->setParameter(1, 'romanb');

$users = $query->getResult();

本示例假定您的聯接表的鍵具有字段地址和用戶。