How to update the mapping information of an entity - php

Question

I would like to change the default mapping of the Product entity from the Sylius ProductBundle. So I created a listener to the ClassMetadata Event:
<?php
namespace App\Symfony\EventListener\Sylius;
use Sylius\Component\Product\Model\Product;
use Doctrine\Common\EventSubscriber;
use Doctrine\Common\Persistence\Mapping\ClassMetadata;
use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
/**
* Remove the reference of a Variant from its parent (Product) without delete it
*/
class ProductLoadMetadataSubscriber implements EventSubscriber
{
/**
* #return array
*/
public function getSubscribedEvents()
{
return array(
'loadClassMetadata',
);
}
/**
* #param LoadClassMetadataEventArgs $eventArgs
*/
public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
{
/** #var ClassMetadata $metadata */
$metadata = $eventArgs->getClassMetadata();
if (Product::class !== $metadata->name) {
return;
}
// Property "variants" in "Sylius\Component\Product\Model\Product" was already declared, but it must be declared only once
$metadata->mapOneToMany([
'fieldName' => 'variants',
'targetEntity' => 'Sylius\Component\Product\Model\VariantInterface',
'mappedBy' => 'object',
'orphanRemoval' => false
]);
//$variantsMapping = $metadata->getAssociationMapping('variants');
//$variantsMapping['orphanRemoval'] = false;
}
}
My goal is to set the orphanRemoval option value to false for the variants field.
But I didn't find a method or something else to update the ClassMetadataInfo instance.
At the moment I have this error:
Property "variants" in "Sylius\Component\Product\Model\Product" was
already declared, but it must be declared only once
It's logical because the variants field already exists.
EDIT:
I tried another thing but without success:
unset($metadata->associationMappings['variants']['orphanRemoval']);
// setAssociationOverride doesn't handle 'orphanRemoval' but it calls internally _validateAndCompleteOneToManyMapping
// which set orphanRemoval to false by default
$metadata->setAssociationOverride('variants', []);

Answer 1

To set orphanRemoval, you can try the following snippet:
if (SomeClass::class === $metadata->getName()) {
if (isset($metadata->associationMappings['itemShippingTrackings'])) {
$metadata->associationMappings['itemShippingTrackings']['orphanRemoval'] = false;
}
}