Added Ulid validation rule.

docs/advanced-usage/validation-attributes.md

@@ -888,6 +888,15 @@ public string $closure;
 public string $closure; 
 ```
 
+### Ulid
+
+[Docs](https://laravel.com/docs/9.x/validation#rule-ulid)
+
+```php
+#[Ulid]
+public string $closure; 
+```
+
 ### Uuid
 
 [Docs](https://laravel.com/docs/9.x/validation#rule-uuid)

src/Attributes/Validation/Ulid.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Spatie\LaravelData\Attributes\Validation;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_PROPERTY)]
+class Ulid extends StringValidationAttribute
+{
+    public static function keyword(): string
+    {
+        return 'ulid';
+    }
+
+    public function parameters(): array
+    {
+        return [];
+    }
+}

src/Support/Validation/ValidationRuleFactory.php

@@ -80,6 +80,7 @@
 use Spatie\LaravelData\Attributes\Validation\Timezone;
 use Spatie\LaravelData\Attributes\Validation\Unique;
 use Spatie\LaravelData\Attributes\Validation\Url;
+use Spatie\LaravelData\Attributes\Validation\Ulid;
 use Spatie\LaravelData\Attributes\Validation\Uuid;
 use Spatie\LaravelData\Exceptions\CouldNotCreateValidationRule;
 
@@ -178,6 +179,7 @@ protected function mapping(): array
             Timezone::keyword() => Timezone::class,
             Unique::keyword() => Unique::class,
             Url::keyword() => Url::class,
+            Ulid::keyword() => Ulid::class,
             Uuid::keyword() => Uuid::class,
         ];
     }

tests/Datasets/Attributes/RulesDataset.php

@@ -83,6 +83,7 @@
 use Spatie\LaravelData\Attributes\Validation\Timezone;
 use Spatie\LaravelData\Attributes\Validation\Unique;
 use Spatie\LaravelData\Attributes\Validation\Url;
+use Spatie\LaravelData\Attributes\Validation\Ulid;
 use Spatie\LaravelData\Attributes\Validation\Uuid;
 use Spatie\LaravelData\Exceptions\CannotBuildValidationRule;
 use Spatie\LaravelData\Support\Validation\ValidationRule;
@@ -362,6 +363,11 @@ function fixature(
         expected: 'url',
     );
 
+    yield fixature(
+        attribute: new Ulid(),
+        expected: 'ulid',
+    );
+
     yield fixature(
         attribute: new Uuid(),
         expected: 'uuid',