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[英]Create a group by query with inner join using Doctrine Query Builder
[英]Doctrine query builder inner join with subselect
我在SQL中的此查询运行正常:
SELECT tl.*
FROM table1 tl
INNER JOIN table2 tl2
ON tl.id = tl2.other_id
INNER JOIN
(
SELECT other_id, MAX(date) maxDATE
FROM table2
GROUP BY other_id
)
tlv2 ON tl2.other_id = tlv2.other_id AND
tl2.date = tlv2.maxDATE WHERE tl.access=0
ORDER BY tlv2.maxDATE DESC
现在的问题是,我似乎无法弄清楚如何将其转换为Doctrine查询builer。
我有这个:
$subquery = $this->getEntityManager()->getRepository(Table2::class)
->createQueryBuilder('tl2')
->select(array('other_id','MAX(date) maxDate'))
->groupBy('other_id')
->getDQL();
$qb = $this->createQueryBuilder('tl');
$qb->select('tl')
->innerJoin(Table2::class,'tl2','WITH','tl.id = tl2.other_id')
->innerJoin("(".$subquery.")",'tlv2','WITH','tl2.date = tlv2.maxDATE')
->where('tl.access = 0')
->orderBy('tlv2.maxDATE','DESC');
但这给了我错误:
Subquery is not supported here
在我放置$subquery
变量的行上。
我似乎无法弄清楚我在做什么错。 我究竟做错了什么?
如此处所述,如果您使用的是ORM,则映射将失败,您只能在没有水合的情况下运行它,以防万一,您仅在使用DBAL时, 它将按预期工作
如果您要使用本机查询解决方案并且仍然需要映射结果,则可以将\\Doctrine\\ORM\\EntityManager::createNativeQuery
与\\Doctrine\\ORM\\Query\\ResultSetMapping
$sql = <<<SQL
SELECT tl.*
FROM table1 tl
INNER JOIN table2 tl2
ON tl.id = tl2.other_id
INNER JOIN
(
SELECT other_id, MAX(date) maxDATE
FROM table2
GROUP BY other_id
)
tlv2 ON tl2.other_id = tlv2.other_id AND
tl2.date = tlv2.maxDATE WHERE tl.access=0
ORDER BY tlv2.maxDATE DESC
SQL;
$rsm = new Query\ResultSetMapping();
$rsm->addEntityResult(Entity::class, 'e');
$rsm->addFieldResult('e','id', 'id');
$rsm->addFieldResult('e','date', 'createAt');
$result = $this->entityManager->createNativeQuery($sql, $rsm)->getResult();
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