Symfony query ids from ManyToMany relation table for every entity item - php

Question

I have two entities Article and Tag with a Many to Many relation. For a bulk edit I query some attributes from every Articles. In that query I also want to query all assigned Tag-IDs from every Article.
I read something about the function GROUP_CONCAT() but Doctrine doesn't support that function yet.
My Doctrine statement is currently like that:
$this->getEntityManager()->createQuery('SELECT e.articleId, e.articleTitle, t.tagId FROM App\Entity\Article e LEFT JOIN e.tags t');
It would be best to fetch those assigned Tag-IDs as an array.

Answer 1

So I extended Doctrine with GROUP_CONCAT function from github.com/beberlei/DoctrineExtensions and use following code to get all IDs as an array:
$query = $this->getEntityManager()->createQuery('SELECT e.articleId, e.articleTitle, GROUP_CONCAT(t.tagId) AS tagIds FROM App\Entity\Article e LEFT JOIN e.tags t GROUP BY e.articleId');
$articleArray = $query->execute();
for ($i = 0; $i < count($articleArray); $i++) {
if (strpos($articleArray[$i]['tagIds'], ',')) {
$arr = array_map('intval', explode(',', $articleArray[$i]['tagIds']));
$articleArray[$i]['tagIds'] = ($arr) ? $arr : [];
}
elseif (!is_null($articleArray[$i]['tagIds'])) $articleArray[$i]['tagIds'] = [(int) $articleArray[$i]['tagIds']];
else continue;
}