Question

我想在Doctrine 2中创建这个语句：

SELECT Id, ParentId , LastName
  FROM Customer
 WHERE ParentId IN 
       (SELECT Id 
          FROM Customer
          WHERE ParentId IN $id)
       )

这是我的代码：

    public function findByCustomer($id) : array
    {
    $qb = $this->_em->createQueryBuilder();
    $qb1 = $this->_em->createQueryBuilder();

    $qb->select('Customer.Id , Customer.ParentId ,  Customer.LastName ');
    $qb->from('..\City\Model\Entities\Customer', 'Customer');       
    $qb->add('where', $qb->expr()->in('Customer.ParentId',

            $qb1->select('Customer.Id');
            $qb1->from('..\City\Model\Entities\Customer', 'Customer');      
            $qb1->add('where', $qb->expr()->in('Customer.ParentId', $id)
            $qb1 = $qb1->getQuery();
            return $qb1->getResult();               

        )
    );
    $qb = $qb->getQuery();
    return $qb->getResult();
}

但它根本不起作用。有什么建议吗？

Answer 1

您可以通过querybuilder这样查看子查询：

$subQuery = $this->_em->createQueryBuilder();
$subQuery->select('c1.Id');
$subQuery->from('..\City\Model\Entities\Customer', 'c1');      
$subQuery->add('where', $qb->expr()->in('c1.ParentId', $id)


$qb = $this->_em->createQueryBuilder();

$qb->select('Customer.Id , Customer.ParentId ,  Customer.LastName ');
$qb->from('..\City\Model\Entities\Customer', 'Customer');       

$qb->andWhere($qb->expr()->in('Customer.ParentId',  $subQuery->getDQL()) );


$query = $qb->getQuery();
return $query->getResult();

希望这个帮助

Answer 2

我有更好的方式来执行此查询，我希望这会对您有所帮助。您可以在doctrine2中使用直接sql语句，如下所示

$sql = "SELECT Id, ParentId , LastName
  FROM Customer
 WHERE ParentId IN 
       (SELECT Id 
          FROM Customer
          WHERE ParentId IN $id)
       )";
 $data = $this->doctrine->sql_conn->fetchAll($sql , array());

我总是使用这个在doctrine2中编写复杂的sql语句。我希望这会对你有所帮助

嵌套在Doctrine2中的位置

2 个答案: