Doctrine2 本机查询多对多

Question

我已阅读有关本机 sql 查询的 Doctrine2 文档。它不讨论由多对多关系连接的实体。我不知道如何处理，任何想法或例子。

Answer 1

你只需要手动将连接表添加到sql中即可。扩展 Doctrine 手册第 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();

此示例假设您的联接表的键包含字段“地址”和“用户”。