diff --git a/app/ModelFilters/CropFilter.php b/app/ModelFilters/CropFilter.php
index 1e52d15..cc5da8d 100644
--- a/app/ModelFilters/CropFilter.php
+++ b/app/ModelFilters/CropFilter.php
@@ -11,6 +11,10 @@ class CropFilter extends ModelFilter
         return $this->where('category_id', $categoryId);
     }
 
+    public function parentId($parentId){
+        return $this->where('parent_id', $parentId);
+    }
+
     public function type($type)
     {
         $q = $this;