Fix: Register participant with no nami member

app/Form/Fields/NamiField.php

@@ -7,6 +7,7 @@ use App\Form\Models\Participant;
 use App\Member\Member;
 use Faker\Generator;
 use Generator as LazyGenerator;
+use Illuminate\Validation\Factory;
 
 class NamiField extends Field
 {
@@ -39,7 +40,7 @@ class NamiField extends Field
      */
     public function getRegistrationRules(Form $form): array
     {
-        $rules = [];
+        $rules = [$this->key => 'present|array'];
 
         $c = collect($form->getFields())
             ->filter(fn ($field) => $field['for_members'] === true)
@@ -67,6 +68,10 @@ class NamiField extends Field
         $rules = [];
         $inputMembers = request($this->key);
 
+        if (!is_array($inputMembers)) {
+            return [];
+        }
+
         $c = collect($form->getFields())
             ->filter(fn ($field) => $field['type'] !== class_basename(static::class))
             ->filter(fn ($field) => $field['for_members'] === true)

tests/Feature/Form/FormRegisterActionTest.php

@@ -400,6 +400,31 @@ class FormRegisterActionTest extends FormTestCase
         $this->assertEquals('', $form->participants->get(1)->data['other']);
     }
 
+    public function testNamiFieldCanBeEmptyArray(): void
+    {
+        $this->login()->loginNami();
+        $form = Form::factory()
+            ->sections([FormtemplateSectionRequest::new()->fields([
+                $this->namiField('members'),
+            ])])
+            ->create();
+
+        $this->register($form, ['members' => []])->assertOk();
+        $this->assertDatabaseCount('participants', 1);
+    }
+
+    public function testNamiFieldMustBeArray(): void
+    {
+        $this->login()->loginNami();
+        $form = Form::factory()
+            ->sections([FormtemplateSectionRequest::new()->fields([
+                $this->namiField('members'),
+            ])])
+            ->create();
+
+        $this->register($form, ['members' => null])->assertJsonValidationErrors(['members']);
+    }
+
     /**
      * @param array<string, mixed> $attributes
      */