Symfony 在原则中的WHERE子句中添加外键

我拥有具有以下字段的实体：

Andrei\StatisticsBundle\Entity\Visit:
    type: entity
    table: visits
    id:
        id:
            type: integer
            generator: { strategy: AUTO }
    fields:
        counter:
            type: integer
        createdAt:
            type: datetime
            column: created_at
    manyToOne:
        visitor:
            targetEntity: Andrei\StatisticsBundle\Entity\Visitor
            inversedBy: visits
            joinColumn:
                name: visitor_id
                referencedColumnName: id
        website:
            targetEntity: Andrei\StatisticsBundle\Entity\Website
            inversedBy: visits
            joinColumn:
                name: website_id
                referencedColumnName: id
        country:
            targetEntity: Andrei\StatisticsBundle\Entity\Country
            inversedBy: visits
            joinColumn:
                name: country_id
                referencedColumnName: id

我想执行一个简单的选择条件，为website_id数据库列添加一个where，如bellow，但它不起作用。我相信网站id现在被视为访问权限的字段，它是网站对象的一个属性，但我不知道如何进行这些类型的查询：

$em = $this->getDoctrine()->getManager();

$repository = $em->getRepository('AndreiStatisticsBundle:Visit');

$qb = $repository->createQueryBuilder('v')
    ->select('SUM(v.counter) AS views, v.createdAt AS day')
    ->where('v.website.id = :website_id')
    ->setParameter('website_id', 3)
    ->groupBy('v.createdAt');

$visits = $qb->getQuery()->getScalarResult();

---

您必须使用getReference获取website类的对象，而无需添加查询，然后将其作为参数链接

$em = $this->getDoctrine()->getManager();

$website    = $em->getReference('AndreiStatisticsBundle:Website', 3);

$repository = $em->getRepository('AndreiStatisticsBundle:Visit');

$qb = $repository->createQueryBuilder('v')
    ->select('SUM(v.counter) AS views, v.createdAt AS day')
    ->where('v.website = :website')
    ->setParameter('website', $website)
    ->groupBy('v.createdAt');

$visits = $qb->getQuery()->getScalarResult();

使用leftJoin的innerJoin

$em = $this->getDoctrine()->getManager();

$repository = $em->getRepository('AndreiStatisticsBundle:Visit');

$qb = $repository->createQueryBuilder('v')
    ->select('SUM(v.counter) AS views, v.createdAt AS day')
    ->innerJoin('v.website', 'w')
    ->where('w.id = :website_id')
    ->setParameter('website_id', 3)
    ->groupBy('v.createdAt');

$visits = $qb->getQuery()->getScalarResult();