skobkin/README.md

Using Symfony Serializer with Symfony\Component\PropertyInfo\Extractor\ReflectionExtractor will cause the type of $url property to be detected incorrectly.

$serializer->deserialize(SomeResponse::class, '{"url": "http://test"}');

We'll get an exception with an error like this:

The type of the "url" attribute for class "SomeResponse" must be one of "bool" ("string" given).

That's because ReflectionExtractor does this:

public function getTypes(string $class, string $property, array $context = []): ?array
{
    if ($fromMutator = $this->extractFromMutator($class, $property)) { // skipped, but will also cause same problem if mutator is present
        return $fromMutator;
    }
    if ($fromAccessor = $this->extractFromAccessor($class, $property)) { // here we go
        return $fromAccessor; // data suggesting 'bool' returned before extracting from constructor
    }
    if (
        ($context['enable_constructor_extraction'] ?? $this->enableConstructorExtraction)
        && $fromConstructor = $this->extractFromConstructor($class, $property)
    ) {
        return $fromConstructor;
    }
    if ($fromPropertyDeclaration = $this->extractFromPropertyDeclaration($class, $property)) {
        return $fromPropertyDeclaration;
    }
    return null;
}

That's a bit unexpected, I guess 🤷

Already reported: symfony/symfony#57719

	<?php

	class SomeResponse
	{
	public function __construct(
	#[SerializedName('url')]
	public readonly ?string $url,
	) {
	}

	public function hasUrl(): bool
	{
	return !empty($this->url);
	}
	}