使用 dql 获取未连接的值

Question

如何使用 dql 获取未连接的值？此代码中的问题是我只收到有评论的帖子 ..

public function getAllPostsDQL()
{
    $q = $this->getEntityManager()
        ->createQuery('SELECT p.type,p.date,p.urlImage,p.nom,u.nom as nomU,u.prenom as prenomU ,COUNT(co) as nb,MAX(co.date) as maxDate FROM PidevBundle:Publication p LEFT OUTER JOIN 
           PidevBundle:Commentaire co WITH co.idPublication=p
           JOIN PidevBundle:User u WITH p.idUser=u
           ');

    return $q->getResult();
}

Answer 1

尝试这样的事情：

public function getAllPostsDQL()
{
    $q = $this->getEntityManager()->createQuery(
        'SELECT 
            p.type,
            p.date,
            p.urlImage,
            p.nom,
            u.nom as nomU,
            u.prenom as prenomU,
            COUNT(co.id) as nb,
            MAX(co.date) as maxDate 
        FROM PidevBundle:Publication p 
        LEFT JOIN p.idUser u
        LEFT JOIN PidevBundle:Commentaire co ON co.id = u.id
    ');

    return $q->getResult();
}

Answer 2

试试这个：（对于 Symfony3 语法可能需要更改）

public function getAllPostsDQL()
{
    $qb = $this->createQueryBuilder('publication');
    $qb->select(array('publication.type', 'publication.date', 'publication.urlImage', 
                      'publication.nom', 'u.nom AS nomU', 'u.prenom AS prenomU', 
                      'COUNT(co.id) AS nb', 'MAX(co.date) AS maxDate'))
       ->leftJoin('p.idUser', 'u')
       ->leftJoin('p.idCommentaire', 'co');

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

Answer 3

我终于找到了解决方案，虽然我认为这是一个垃圾代码：/ 谢谢大家。代码：

public function getAllPostsDQL()
{
    $q = $this->getEntityManager()->createQuery(
        'SELECT 
                p.type,
                p.date,
                p.urlImage,
                p.nom,
                u.nom as nomU,
                u.prenom as prenomU,
                (SELECT COUNT(co.id) FROM PidevBundle:Commentaire co WHERE co.idPublication=p) as nb,
                (SELECT MAX(com.date) FROM PidevBundle:Commentaire com WHERE com.idPublication=p) as maxDate
                FROM PidevBundle:Publication p 
                INNER JOIN p.idUser u
                ');
    return $q->getResult();
}

使用 dql 获取未连接的值

Get unjoined values with dql

doctrine

dql

symfony

doctrine-orm

web