Doctrine2 QB –如何选择不存在OnetoOne实体的实体

Question

I have two entities:

class User extends BaseEntity {

    /**
     * @ORM\OneToOne(targetEntity="Profile", mappedBy="user", cascade={"persist", "remove"})
     * @var Profile
     */
    protected $profile;
}

class Profile extends BaseEntity {

    /**
     * @ORM\OneToOne(targetEntity="User", inversedBy="profile", cascade={"persist"})
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE")
     * @var User
     */
    protected $user;
}

What I'm trying to do is to SELECT only users who don't have any profile (so there's no profile row with user_id=:user_id in profiles table). However, I have no idea how to make my QueryBuilder.

First, I tried something simple like

//u as user
$query = $this->er->createQueryBuilder('u');
$query
    ->join('u.profile', 'p')
    ->where('u.profile = 1');

But that returns A single-valued association path expression to an inverse side is not supported in DQL queries. Use an explicit join instead. A single-valued association path expression to an inverse side is not supported in DQL queries. Use an explicit join instead. so I suppose there's something wrong with my relationship? I tried to switch join() for leftJoin() but it didn't help either...

So what's up with this error and how to make proper condition with where() to tell Doctrine I want only users where there's no profile?

Answer 1

Here is how I was able to do it. Basically I had Domain & Hosting entities and I wanted to select Domains that had no Hosting attached to them in a one to one relationship.

$er->createQueryBuilder('d')
                    ->leftJoin('d.hosting', 'h')
                    ->where('h.id is NULL');

Credits for this solution goes to this Answer

Hope it works for you since our situations are almost identical.

Answer 2

Just check for null as value of profile

//u as user
$query = $this->er->createQueryBuilder('u');
$query
    ->where('u.profile is NULL');

Answer 3

Try to use repositories, example for UserRepository :

$qb = $this->createQueryBuilder('u');
$e  = $qb->expr();
$qb->leftJoin('u.profile', 'p')
    ->where($e->isNull('p.id'))

Raw query will look like this:

SELECT * FROM users AS u LEFT JOIN u.profile AS p WHERE p.id IS NULL;