#[Rules]

Declares Laravel validation rules for a constructor parameter. Rules are applied by validate() and fromValidated().

Syntax

use StdOut\SimpleDataObjects\Attributes\Rules;

#[Rules(['rule1', 'rule2', ...])]
public readonly string $property,

Example

use Illuminate\Validation\Rules\Password;

class RegisterData extends BaseData
{
    public function __construct(
        #[Rules(['required', 'string', 'max:100'])]
        public readonly string $name,

        #[Rules(['required', 'email:rfc,dns'])]
        public readonly string $email,

        #[Rules(['required', new Password->min(8)->letters()->numbers()])]
        public readonly string $password,

        #[Rules(['nullable', 'date_format:Y-m-d'])]
        public readonly ?string $birthday = null,
    ) {}
}

Validation Methods

Method	Behaviour
fromValidated($data)	Validates then hydrates. Throws ValidationException on failure.
validate($data)	Validates only. Throws ValidationException on failure, returns void.
from($data)	No validation. Use for trusted internal data.

All Rule Types Supported

Any rule type supported by Laravel works:

#[Rules(['required', 'string'])]                        // string rules
#[Rules(['required', Rule::in(['a', 'b'])])]             // Rule objects
#[Rules(['required', fn ($attr, $val, $fail) => ...])]  // closures
#[Rules(['required', new CustomRule])]                   // custom Rule classes

File Cache

String rules are always file-cacheable. Non-string rules (Rule objects, closures) disable the file cache for that class and fall back to in-memory caching.

Nullable Fields

Always include nullable in rules for optional properties to avoid spurious "field is required" errors:

#[Rules(['nullable', 'string', 'max:200'])]
public readonly ?string $notes = null,