AutoMapper fails to map a nested array to a specified model type

[alexk136]

When trying to use AutoMapper to map a nested array structure to a nested model type in Symfony, an error occurs due to the configuration in Symfony\Component\PropertyInfo\Type, which sets the collection attribute to true for nested arrays. As a result, AutoMapper interprets the endpoints property as an array rather than an object of type TestSubTarget, causing a TypeError.

Here’s a simplified version of the mapping logic to reproduce the issue:

class ClassContainer
{
    public ?array $endpoints = null;
}

class TestSubTarget
{
    public function __construct(
        private ?string $endpoint = null,
        private ?array $params = null,
    ) {}
}

class TestTarget
{
    public function __construct(
        private ?TestSubTarget $endpoints = null,
    ) {}
}

Steps to reproduce:

   $classContainer = new ClassContainer();
   $classContainer->endpoints = [
       'endpoint' => 'https://example.com',
       'params' => ['param1', 'param2'],
   ];
   
   $autoMapper->map($classContainer, TestTarget::class);

This triggers the error:

TypeError: TestTarget::__construct(): Argument #1 ($endpoints) must be of type ?TestSubTarget, array given.

It would be great to have an option to override the collection type or manually specify the target type for nested arrays in AutoMapper.

Automapper version: 9.1.2