Symfony retrieve Unique values from EAV model - symfony

Question

I'm trying to make product filters but I can't generate a correct query
А quick look at the base
db visually
here are my entities:
AttributeType:
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=100, nullable=true)
*/
private $name;
/**
* #ORM\OneToMany(targetEntity=AttributeValue::class, mappedBy="attributeType")
*/
private $attributeValue;
public function __construct()
{
$this->attributeValue = new ArrayCollection();
}
AttributeValue:
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity=Product::class, inversedBy="attributeValues")
*/
private $product;
/**
* #ORM\Column(type="string", length=100)
*/
private $value;
/**
* #ORM\ManyToOne(targetEntity=AttributeType::class, inversedBy="attributeValue")
*/
private $attributeType;
For example AttributeType(Color) has AttributeValue(Red, Blue, Green) & i retrieve hundred of red, blue, green AttributeValue for a single Color option
that query returns options with all value(not unique):
return $this->createQueryBuilder('at')
->innerJoin('at.attributeValue', 'attribute_value')
->addSelect('attribute_value')
->getQuery()
->getResult();
I tried to modify the request like this:
return $this->createQueryBuilder('at')
->innerJoin('at.attributeValue', 'attribute_value')
->addSelect('attribute_value.value')->distinct()
->getQuery()
->getResult();
(there were other attempts, but they were all not even close)
How do I get unique values for each option?
I will be grateful for any help
And thx for your time.

Answer 1

I get unique values for each option
public function findOptionsWithUniqueValue()
{
$result = $this->getEntityManager()->createQueryBuilder()
->addSelect('attribute_type.name, attribute_value.value')
->distinct()
->from(AttributeType::class,'attribute_type')
->from(AttributeValue::class, 'attribute_value')
->andWhere('attribute_type.id = attribute_value.attributeType')
->getQuery()
->getResult()
;
$out = [];
while( $a = array_shift($result)) {
$out[$a['name']][] = $a['value'];
}
return $out;
}