diff --git a/app/Models/Document.php b/app/Models/Document.php
index 742e5b0..1ed1d2e 100644
--- a/app/Models/Document.php
+++ b/app/Models/Document.php
@@ -15,4 +15,10 @@ class Document extends Model
         'name',
         'parent_id',
     ];
+
+    public function childs() {
+
+        return $this->hasMany('App\Category','parent_id','id') ;
+
+    }
 }