Doctrine DQL连接表

Question

for my API development I use apigility and doctrine. I'm currently programming an endpoint that users can like a post. Every post has an author. I have 2 tables with the following columns and example data inside:

Action

id  post_id   user_id  createdAt
1   10        1        0000-00-00 00:00:00
2   12        2        0000-00-00 00:00:00
3   13        3        0000-00-00 00:00:00

(post_id = foreign key to post table) (user_id = source user which likes a post)

Post

id  user_id   createdAt
10  62        0000-00-00 00:00:00
12  4         0000-00-00 00:00:00
13  4         0000-00-00 00:00:00

(user_id = foreign key to user table)

What I need

I need the total_likes which an author (user_id) has. This can be queried over the Action table by joining the post table. I have already tried to create a DQL query for this:

// Get total likes an autor has received
$queryBuilder->select('count(p)')
    ->from('Db\Entity\Action', 'a')
    ->leftJoin('p.post', 'p')
    ->where('p.user = :user')
    ->setParameter('user', $targetUser);
$totalLikes = $queryBuilder->getQuery()->getSingleScalarResult();

Which this query, I get the wrong number of total_likes:

{
  "total_likes": "2"
}

How do I have to correct this query that I get the correct count of likes of a user? With the example table data, the total_likes of user_id=62 should give me this back:

{
  "total_likes": "1"
}

Answer 1

Try this:

// Get total likes an autor has received
$queryBuilder
    ->select('count(p)')
    ->from('Db\Entity\Action', 'a')
    ->leftJoin(
        'Db\Entity\Post',
        'p',
        \Doctrine\ORM\Query\Expr\Join::WITH,
        'a.post = p.id'
     )
     ->where('p.user = :user')
     ->setParameter('user', $users);

    $totalLikes = $queryBuilder->getQuery()->getSingleScalarResult();
}