学说不存在子查询 [英] doctrine not exists subquery
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问题描述
我在存储库中有以下代码:
I have in a repository this code:
public function getNotAssignedBy($speciality, $diploma)
{
$qb = $this->createQueryBuilder('j')
->select('DISTINCT(j.id) id', 'j.firstName', 'j.lastName', 'j.dateBirth', 'j.sex')
->leftJoin('j.qualifications', 'q')
;
if ($speciality) {
$qb->andWhere('q.speciality = :speciality_id')->setParameter('speciality_id', $speciality);
}
if ($diploma) {
$qb->andWhere('q.diploma = :diploma_id')->setParameter('diploma_id', $diploma);
}
$result = $qb->getQuery()->getResult();
return $result;
}
如何仅获取ID在另一个实体中不存在的行?
How can I get only rows where id not exists in another entity ??
任何帮助。谢谢
推荐答案
您可以通过以下方式实现它:
You can achieve it with something like this:
....
// construct a subselect joined with an entity that have a relation with the first table as example user
$sub = $this->createQueryBuilder();
$sub->select("t");
$sub->from("AnotherEntity","t");
$sub->andWhere('t.user = j.id');
// Your query builder:
$qb->andWhere($qb->expr()->not($qb->expr()->exists($sub->getDQL())));
希望获得帮助
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