Issue with nested data validation

tests/DataTest.php

@@ -68,6 +68,8 @@
 use Spatie\LaravelData\WithData;
 
 use function Spatie\Snapshots\assertMatchesSnapshot;
+use Spatie\LaravelData\Tests\Fakes\DataWithDatetimeImmutable;
+use Spatie\LaravelData\Attributes\Validation\Nullable;
 
 it('can create a resource', function () {
  $data = new SimpleData('Ruben');
@@ -568,6 +570,36 @@ public function __construct(
  ]);
 });
 
+it('can validate nested data collection date from json string', function () {
+
+ $objectWithDataCollection = new class () extends Data {
+ #[DataCollectionOf(DataWithDatetimeImmutable::class), Nullable]
+ public ?DataCollection $collection;
+
+ public bool $boolean;
+ };
+
+ $firstJson = '{"date_to": "2020-05-16", "date_from": "2020-05-17"}';
+ $secondJson = '{"date_to": "2020-05-16", "date_from": "2020-05-15"}';
+
+ expect(DataWithDatetimeImmutable::from(json_decode($firstJson, true)))
+ ->date_to
+ ->toBeInstanceOf(DateTimeImmutable::class)
+ ->toEqual(DateTimeImmutable::createFromFormat('Y-m-d', '2020-05-16'));
+
+ expect(fn() => DataWithDatetimeImmutable::validateAndCreate(json_decode($secondJson, true)))
+ ->toThrow(ValidationException::class);
+
+ $jsonArray = json_decode('{"boolean":true,"collection":[{"date_to":"2020-05-16","date_from":"2020-05-15"},{"date_to":"2020-05-16","date_from":"2020-05-17"}]}', true);
+
+ expect($objectWithDataCollection::validateAndCreate($jsonArray))
+ ->boolean->toBeTrue();
+
+ expect(fn() => $objectWithDataCollection::validateAndCreate($jsonArray))
+ ->toThrow(ValidationException::class);
+
+});
+
 it('can get the data object without transforming', function () {
  $data = new class (
  $dataObject = new SimpleData('Test'),

tests/Fakes/DataWithDatetimeImmutable.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Spatie\LaravelData\Tests\Fakes;
+
+use DateTimeImmutable;
+use Spatie\LaravelData\Attributes\Validation\AfterOrEqual;
+use Spatie\LaravelData\Attributes\Validation\Required;
+use Spatie\LaravelData\Attributes\WithCast;
+use Spatie\LaravelData\Casts\DateTimeInterfaceCast;
+use Spatie\LaravelData\Data;
+
+class DataWithDatetimeImmutable extends Data
+{
+ #[Required, BeforeOrEqual('date_to'), WithCast(DateTimeInterfaceCast::class, format: 'Y-m-d')]
+ public DateTimeImmutable $date_from;
+
+ #[Required, AfterOrEqual('date_from'), WithCast(DateTimeInterfaceCast::class, format: 'Y-m-d')]
+ public DateTimeImmutable $date_to;
+}