Form with variable number of criterias on Symfony4 / Doctrine2 - php

Question

Let's take https://symfony.com/doc/current/forms.html#building-the-form example form but only for Search in tasks list instead of save.
Goal is to allow searches on task, dueDate or both criterias (in my real case, I have 9 criterias)
Here are src/Repository/ResultRepository.php :
class ResultRepository extends ServiceEntityRepository
{
public function __construct(RegistryInterface $registry)
{
parent::__construct($registry, Result::class);
}
public function findMultiKeys($task, $dueDate): array
{
$qb = $this->createQueryBuilder('d')
->andWhere('d.task = :task')
->setParameter('task', $task)
->andWhere('d.dueDate = :dueDate')
->setParameter('dueDate', $dueDate)
->getQuery();
return $qb->execute();
}
}
It require both criterias to return result(s)!

Answer 1

I ran a lot of searches and find:
How do I use a complex criteria inside a doctrine 2 entity's
repository?
Symfony2/Doctrine QueryBuilder using
andwhere()
Doctrine2 doc - setParameters method
So I code a $where_string variable to construct my variable where.
and a $parameters to construct my variable parameters array, and my findMultiKeys becomes:
public function findMultiKeys($get_form): array
{
$where_string = '';
$parameters = [];
$task = $get_form->getTask();
if ($task !== null) {
$where_string .= "d.task = :task";
$parameters += array('task' => $task);
}
$dueDate = $get_form->getDueDate();
if ($dueDate !== null) {
if ($where_string !== '')
$where_string .= " AND ";
$where_string .= "d.dueDate = :dueDate";
$parameters += array('dueDate' => $dueDate);
}
$qb = $this->createQueryBuilder('d')
->where($where_string)
->setParameters($parameters)
->getQuery();
return $qb->execute();
}
It works, perhaps not the best way?
In my searches, I found, of course, to use ElasticSearch, perhaps to much to my simple need, or I found PetkoparaMultiSearchBundle
Bests solutions welcomes

Answer 2

I have a proposition :-)
You can build an task4Seach entity with your 9 criteria (without
persistance)
create a form type with this "data_class"
use it to get your datas in your repository
$qb = $this->createQueryBuilder('d');
...
if ($task4Seach ->getDueDate()) {
$qb->andWhere($qb->expr()->eq('d.dueDate', ':dueDate'));
$qb->setParameter('dueDate', $task4Seach->getDueDate());
}