Argonaut DTO Package for Laravel

The Argonaut DTO for Laravel is a lightweight Data Transfer Object (DTO) package that supports nested casting, recursive serialization, and validation out of the box. Ideal for service layers, APIs, and architecture workflows:

class UserDTO extends ArgonautDTO
{
    public string $username;
    public string $email;

    protected array $casts = [
        'username' => 'string',
        'email' => 'string',
    ];

    public function rules(): array
    {
        return [
            'username' => ['required', 'string'],
            'email' => ['required', 'email'],
        ];
    }
}

Using the package's assember classes, you can map raw inputs like objects or arrays into DTOs:

class UserDTOAssembler extends ArgonautAssembler
{
    public static function toUserDTO(object $input): UserDTO
    {
        return new UserDTO([
            'username' => $input->display_name,
            'email' => $input->email,
        ]);
    }
}

// Using the assembler
$user = UserDTOAssembler::assemble([
    'display_name' => 'jdoe',
    'email' => 'jdoe@example.com',
], UserDTO::class);

// Using the `fromArray method:
$user = UserDTOAssembler::fromArray($userData, UserDTO::class);

Once you've assembled the DTO, you can validate the object:

$user->validate(); // Throws ValidationException
$user->validate(throw: false); // Returns array of errors
$user->isValid(); // true/false

#Main Features

• Deep nested transformation and casting
• Type-safe data conversion
• Validation using Laravel’s validator
• Casts transform values into other DTOs, Collections, dates, arrays, etc.
• Explicit attribute prioritization
• Clean serialization (toArray, toJson)
• Consistent data shape enforcement across boundaries

You can learn more about this package, get full installation instructions, and view the source code on GitHub.