Filter on collection - symfony

Question

Is there way to filter collection, e.g.
class Company{
/**
* #ORM\OneToMany(targetEntity="App\Entity\User", mappedBy="company", cascade={"persist","remove"})
*/
public $users;
}
on way to check that company have users. But i need to filter on company side, so send request /api/companies?somefilter.
So point is there way to check is collection empty?

Answer 1

You can add a boolean column in companies where you set to true when create a user relation.
So you can add a BooleanFilter to you company entity for check companies which have users.
/**
* #ApiResource
* #ApiFilter(BooleanFilter::class, properties={"hasUsers"})
*/
Or you can create a CustomFilter where you input true o false and get companies with users throught queryBuilder
https://api-platform.com/docs/core/filters/#creating-custom-doctrine-orm-filters
<?php
// api/src/Filter/RegexpFilter.php
namespace App\Filter;
use ApiPlatform\Core\Bridge\Doctrine\Orm\Filter\AbstractContextAwareFilter;
use ApiPlatform\Core\Bridge\Doctrine\Orm\Util\QueryNameGeneratorInterface;
use Doctrine\ORM\QueryBuilder;
final class RegexpFilter extends AbstractContextAwareFilter
{
protected function filterProperty(string $property, $value, QueryBuilder $queryBuilder, QueryNameGeneratorInterface $queryNameGenerator, string $resourceClass, string $operationName = null)
{
// otherwise filter is applied to order and page as well
if (
!$this->isPropertyEnabled($property, $resourceClass) ||
!$this->isPropertyMapped($property, $resourceClass)
) {
return;
}
$parameterName = $queryNameGenerator->generateParameterName($property);
// Generate a unique parameter name to avoid collisions with other filters
$queryBuilder
->andWhere(sprintf('REGEXP(o.%s, :%s) = 1', $property, $parameterName))
->setParameter($parameterName, $value);
}
// This function is only used to hook in documentation generators (supported by Swagger and Hydra)
public function getDescription(string $resourceClass): array
{
if (!$this->properties) {
return [];
}
$description = [];
foreach ($this->properties as $property => $strategy) {
$description["regexp_$property"] = [
'property' => $property,
'type' => 'string',
'required' => false,
'swagger' => [
'description' => 'Filter using a regex. This will appear in the Swagger documentation!',
'name' => 'Custom name to use in the Swagger documentation',
'type' => 'Will appear below the name in the Swagger documentation',
],
];
}
return $description;
}
}