find elements by set

backend/app/Element/ElementRepository.php

@@ -2,6 +2,8 @@
 
 namespace App\Element;
 
+use App\Set\Set as DomainSet;
+
 interface ElementRepository
 {
     public function create(CreateElementDto $dto): Element;
@@ -11,5 +13,5 @@ interface ElementRepository
     /**
      * @return Element[]
      */
-    public function findBySetId(int $id): array;
+    public function findBySet(DomainSet $set): array;
 }

backend/app/Element/EloquentElementRepository.php

@@ -2,6 +2,7 @@
 
 namespace App\Element;
 
+use App\Set\Set as DomainSet;
 use App\Set\SetRepository;
 use DomainException;
 
@@ -35,9 +36,11 @@ class EloquentElementRepository implements ElementRepository
     /**
      * @return Element[]
      */
-    public function findBySetId(int $id): array
+    public function findBySet(DomainSet $set): array
     {
-        $models = ElementModel::where('set_id', $id)->orderBy('id')->get();
+        $models = ElementModel::where('set_id', $set->getId())
+            ->orderBy('id')
+            ->get();
         $elements = [];
         foreach ($models as $model) {
             $elements[] = $this->toDomain($model);

backend/app/Element/UseCases/CreateElement/CreateElement.php

@@ -6,6 +6,7 @@ use App\Element\CreateElementDto;
 use App\Element\Element;
 use App\Element\ElementRepository;
 use App\Exceptions\BadRequestException;
+use App\Set\Set as DomainSet;
 use App\Set\SetRepository;
 use DomainException;
 
@@ -37,7 +38,7 @@ class CreateElement
         }
 
         if ($request->parentElementId === null) {
-            $this->validateNoRootElementExists($request->setId);
+            $this->validateNoRootElementExists($set);
 
             return $this->elementRepo->create(new CreateElementDto(
                 set: $set,
@@ -70,9 +71,9 @@ class CreateElement
     /**
      * @throws DomainException
      */
-    private function validateNoRootElementExists(int $setId): void
+    private function validateNoRootElementExists(DomainSet $set): void
     {
-        $elements = $this->elementRepo->findBySetId($setId);
+        $elements = $this->elementRepo->findBySet($set);
         foreach ($elements as $element) {
             if ($element->getParentElement() === null) {
                 throw new DomainException(