set userrealtion & organization to list of their childs - BaseVewSet

apps/authentication/services/service.py

@@ -1,4 +1,5 @@
 import typing
+
 from apps.authentication.models import Organization
 
 
@@ -15,3 +16,15 @@ def get_users_of_organization(org: Organization) -> typing.Any:
     } for rel in user_relations]
 
     return users_list
+
+
+def get_all_org_child(org: Organization = None) -> typing.Any:
+    """
+    get all child of an organization
+    """
+    descendants = []
+    children = org.parents.all()
+    for child in children:
+        descendants.append(child)
+        descendants.extend(get_all_org_child(child))
+    return descendants