Fix #774

src/Normalizers/Normalized/NormalizedModel.php

@@ -21,7 +21,15 @@ public function getProperty(string $name, DataProperty $dataProperty): mixed
     {
         $propertyName = $this->model::$snakeAttributes ? Str::snake($name) : $name;
 
-        return $this->properties[$propertyName] ?? $this->fetchNewProperty($propertyName, $dataProperty);
+        $value = array_key_exists($propertyName, $this->properties)
+            ? $this->properties[$propertyName]
+            : $this->fetchNewProperty($propertyName, $dataProperty);
+
+        if ($value === null && ! $dataProperty->type->isNullable) {
+            return UnknownProperty::create();
+        }
+
+        return $value;
     }
 
     protected function initialize(Model $model): void

tests/CreationTest.php

@@ -235,6 +235,7 @@
         'boolean' => true,
         'date' => CarbonImmutable::create(2020, 05, 16, 12, 00, 00),
         'nullable_date' => null,
+        'nullable_optional_date' => null,
     ]);
 
     $dataClass = new class () extends Data {
@@ -245,6 +246,10 @@
         public Carbon $date;
 
         public ?Carbon $nullable_date;
+
+        public Optional|Carbon $optional_date;
+
+        public Optional|null|Carbon $nullable_optional_date;
     };
 
     $data = $dataClass::from(DummyModel::findOrFail($model->id));
@@ -253,9 +258,13 @@
         ->string->toEqual('test')
         ->boolean->toBeTrue()
         ->nullable_date->toBeNull()
+        ->optional_date->toBeInstanceOf(Optional::class)
+        ->nullable_optional_date->toBeNull()
         ->and(CarbonImmutable::create(2020, 05, 16, 12, 00, 00)->eq($data->date))->toBeTrue();
 });
 
+
+
 it('can create a data object from a stdClass object', function () {
     $object = (object) [
         'string' => 'test',

tests/Fakes/Models/DummyModel.php

@@ -11,6 +11,8 @@ class DummyModel extends Model
     protected $casts = [
         'date' => 'datetime',
         'nullable_date' => 'datetime',
+        'optional_date' => 'datetime',
+        'nullable_optional_date' => 'datetime',
         'boolean' => 'boolean',
     ];
 
@@ -22,6 +24,8 @@ public static function migrate()
             $blueprint->string('string');
             $blueprint->dateTime('date');
             $blueprint->dateTime('nullable_date')->nullable();
+            $blueprint->dateTime('optional_date')->nullable();
+            $blueprint->dateTime('nullable_optional_date')->nullable();
             $blueprint->boolean('boolean');
 
             $blueprint->timestamps();