Special '*' serialization group

[SergeyCherenkov]

Description

The SymfonySerializer has a special group * that allows you to serialize all fields.

symfony/symfony#33540
symfony/symfony#32622
symfony/symfony@de58759

The SerializerPropertyMetadataFactory treats it as a regular group.

namespace ApiPlatform\Metadata\Property\Factory;

final class SerializerPropertyMetadataFactory implements PropertyMetadataFactoryInterface
{
    // ...
    private function transformReadWrite(ApiProperty $propertyMetadata, string $resourceClass, string $propertyName, ?array $normalizationGroups = null, ?array $denormalizationGroups = null): ApiProperty
    {
        $serializerAttributeMetadata = $this->getSerializerAttributeMetadata($resourceClass, $propertyName);
        $groups = $serializerAttributeMetadata ? $serializerAttributeMetadata->getGroups() : [];
        $ignored = $serializerAttributeMetadata && $serializerAttributeMetadata->isIgnored();

        if (false !== $propertyMetadata->isReadable()) {
            $propertyMetadata = $propertyMetadata->withReadable(!$ignored && (null === $normalizationGroups || array_intersect($normalizationGroups, $groups)));
        }

        if (false !== $propertyMetadata->isWritable()) {
            $propertyMetadata = $propertyMetadata->withWritable(!$ignored && (null === $denormalizationGroups || array_intersect($denormalizationGroups, $groups)));
        }

        return $propertyMetadata;
    }
    // ...
}

Wouldn't it be correct to add handling for this group in API Platform?

[SergeyCherenkov]

I propose the following solution (I think it's also applicable for denormalization).

namespace ApiPlatform\Metadata\Property\Factory;

final class SerializerPropertyMetadataFactory implements PropertyMetadataFactoryInterface
{
    // ...
    private function transformReadWrite(ApiProperty $propertyMetadata, string $resourceClass, string $propertyName, ?array $normalizationGroups = null, ?array $denormalizationGroups = null): ApiProperty
    {
        $serializerAttributeMetadata = $this->getSerializerAttributeMetadata($resourceClass, $propertyName);
        $groups = $serializerAttributeMetadata ? $serializerAttributeMetadata->getGroups() : [];
        $groups = array_merge($groups, ['*']); // new line

        $ignored = $serializerAttributeMetadata && $serializerAttributeMetadata->isIgnored();

        if (false !== $propertyMetadata->isReadable()) {
            $propertyMetadata = $propertyMetadata->withReadable(!$ignored && (null === $normalizationGroups || array_intersect($normalizationGroups, $groups)));
        }

        if (false !== $propertyMetadata->isWritable()) {
            $propertyMetadata = $propertyMetadata->withWritable(!$ignored && (null === $denormalizationGroups || array_intersect($denormalizationGroups, $groups)));
        }

        return $propertyMetadata;
    }
    // ...
}

If this is a correct solution, I can create a PR.

[soyuka]

Shouldn't the * group be opt-in? What behavior should change in our code? I guess that this makes properties readable/writable if they've a group? poke @dunglas