Doctrine 2: QueryBuilder Join with subquery

Question

我需要将本机查询转换为学说查询。

本机查询

select u.*, v.browser_id
from users u
left join visits v
    on u.id = v.user_id
    and v.id = (
        select max(id) from visits v2
        where v2.user_id = u.id
    )

你可以在这里看到，我需要 select 使用最新浏览器访问的用户

所以要将此查询转换为 DQL，我明白我需要做这样的事情

        $queryBuilder->leftJoin('u.visits', 'lastVis', Join::WITH,
            // ????
        );

但我不知道具体是什么。也许有人会很快解决这个问题？

Answer 1

谢谢，看来我找到了解决办法:)

        $subQuery = $this->entityManager->createQueryBuilder()
            ->select('MAX(vis2.id)')
            ->from(Visit::class, 'vis2')
            ->where('vis2.user = u.id');

        $this->entityManager->createQueryBuilder()
            ->select('u')
            ->from(User::class, 'u')
            ->leftJoin(
                'u.visits', 'vis',
                Join::WITH, sprintf('vis.id = (%s)', $subQuery->getDQL()),
            );

Doctrine 2: QueryBuilder Join with subquery

Doctrine 2: QueryBuilder Join with subquery

php

mysql

sql

doctrine

doctrine-orm