使用 Doctrine 2 querybuilder 在 where 中执行子查询

Question

我正在尝试（但没有成功）在 Doctrine2 查询生成器中翻译这个 SQL 查询。我应该如何使用 Querybuilder 将子选择包含在 Where 中？

SQL 我正在尝试使用 querybuilder 实现的查询：

SELECT * FROM `message` A 
WHERE A.id =
(SELECT B.id FROM `message` B 
WHERE (A.user_id = B.user_id AND A.receiver_id = B.receiver_id) OR (A.user_id = B.receiver_id AND A.receiver_id = B.user_id)
ORDER BY creationdate DESC 
LIMIT 1)

到目前为止，我在消息存储库中尝试过类似的方法，但我想我离实现它的好方法还很远：

public function getConversations()
    {
      $qb = $this
        ->createQueryBuilder('A')
        ->Where('A.id IN 
            (SELECT B.id FROM Message B 
            WHERE (A.user_id = B.user_id AND A.receiver_id = B.receiver_id) OR (A.user_id = B.receiver_id AND A.receiver_id = B.user_id)
            ORDER BY creationdate DESC
            LIMIT 1')
      ;

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

此触发错误信息：

Error: Class 'Message' is not defined.

Answer 1

对于感兴趣的人，我终于找到了解决方案。我是这样查询的（如果有人有其他解决方案我很感兴趣）：

public function getConversations()
{
    $rawSql = "SELECT * FROM `message` A 
                WHERE A.id =
                (SELECT B.id FROM `message` B 
                WHERE (A.user_id = B.user_id AND A.receiver_id = B.receiver_id) OR (A.user_id = B.receiver_id AND A.receiver_id = B.user_id)
                ORDER BY creationdate DESC 
                LIMIT 1)
                ";

    $stmt = $this->getEntityManager()->getConnection()->prepare($rawSql);
    $stmt->execute([]);

    return $stmt->fetchAll();
}

使用 Doctrine 2 querybuilder 在 where 中执行子查询

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