fix withRelationsCount and withRelationsExistence on get

Author: Marius

src/Http/Controllers/ResourceControllerTrait.php

@@ -104,17 +104,19 @@ public function get(string $identifier, Request $request): JsonResponse
                 $this->getFilteredRelations((array)$request->get('withRelations'))
             );
             $result = $baseModel->toArray();
-            $countRelations = $this->getFilteredRelations((array)$request->get('withRelationsCount'));
+            $countRelations = $this->getFilteredRelations((array)$request->get('withRelationsCount'), $baseModel);
 
             foreach ($countRelations as $relationName) {
-                $result[$relationName . ListFilterBuilder::COUNT_ALIAS_POSTFIX] ??=
+                $result[$relationName . '_count'] ??=
                     $baseModel->{$relationName}()->count();
             }
 
-            foreach ($this->getFilteredRelations((array)$request->get('withRelationsExistence')) as $relationName) {
+            foreach (
+                $this->getFilteredRelations((array)$request->get('withRelationsExistence'), $baseModel) as $relationName
+            ) {
                 $result[$relationName . '_exist'] ??= \in_array($relationName, $countRelations, true) &&
-                    \is_int($result[$relationName . ListFilterBuilder::COUNT_ALIAS_POSTFIX] ?? null) ?
-                    $result[$relationName . ListFilterBuilder::COUNT_ALIAS_POSTFIX] > 0 :
+                    \is_int($result[$relationName . '_count'] ?? null) ?
+                    $result[$relationName . '_count'] > 0 :
                     $baseModel->{$relationName}()->exists();
             }