Doctrine: Automatic ResultMapping of Native Query? - doctrine-orm

Question

After some research, I made this UNION query work in my Repository class:
class PostRepository extends ServiceEntityRepository {
// ...
public function getLatestPostsOfUser ($limit = 10) : ?array {
$sql = <<<SQL
SELECT p.id, p.title, p.content, p.images, p.parent_id, p.parent_type, p.created, p.last_modified FROM cms_posts p
LEFT JOIN cms_user_follow ON (p.parent_type = cms_user_follow.followed_entity_type AND p.parent_id = cms_user_follow.followed_entity_id)
WHERE cms_user_follow.user_id = {$this->currentUser->getId()}
UNION
SELECT p.id, p.title, p.content, p.images, p.parent_id, p.parent_type, p.created, p.last_modified FROM cms_posts p
LEFT JOIN project_memberships ON (p.parent_type = 'Project' AND p.parent_id = project_memberships.project_id)
WHERE project_memberships.user_id = {$this->currentUser->getId()} and project_memberships.status = 1
ORDER BY created DESC
LIMIT $limit
SQL;
$res = [];
try {
$rsm = (new ResultSetMapping())
->addEntityResult(Post::class, 'p')
->addFieldResult('p', 'id', 'id')
->addFieldResult('p', 'title', 'title')
->addFieldResult('p', 'content', 'content')
->addFieldResult('p', 'images', 'images')
->addFieldResult('p', 'parent_id', 'parentId')
->addFieldResult('p', 'parent_type', 'parentType')
->addFieldResult('p', 'created', 'created')
->addFieldResult('p', 'last_modified', 'lastModified')
;
$res = $this->getEntityManager()->createNativeQuery($sql, $rsm)->getArrayResult();
} catch (DBALException $e) {
}
return $res;
}
}
It involves an awefull lot of manual field mapping, so I was wondering wheather there is an automatic solution to this?
Many thx!

Answer 1

It looks like Doctrine can do something like this under the hood and also apply the mappings automatically:
$qb = $this->em->createQueryBuilder();
$where = $qb->expr()->andX(
$qb->expr()->eq('f.followedEntityId', ':parentId'),
$qb->expr()->eq('f.followedEntityType', ':parentType'),
$qb->expr()->eq('f.following', 1),
$qb->expr()->eq('u.allowEmailNotifications', 1),
$qb->expr()->eq('u.enabled', 1),
);
$qb->select('f', 'u')
->from(UserFollow::class, 'f')
->leftJoin(
User::class,
'u',
Join::WITH,
'f.userId = u.id'
)
->where($where)
->setParameters([
'parentId' => $post->getParentId(),
'parentType' => $post->getParentType()
])
;
$usersAndFollowings = $qb->getQuery()->getResult();
$usersAndFollowings is then a flat array with both entities alternating: [UserFollow, User, UserFollow, User, ...]
You'll probably want to process it afterwards, so that connected UserFollow and User entities are together in a sub array.