[GitHub] [airflow] uranusjr commented on a diff in pull request #23510: Fix permission issue for dag that has dot in name

[GitBox]

uranusjr commented on code in PR #23510:
URL: https://github.com/apache/airflow/pull/23510#discussion_r884199036


##########
airflow/security/permissions.py:
##########
@@ -66,14 +66,16 @@
 DAG_ACTIONS = {ACTION_CAN_READ, ACTION_CAN_EDIT, ACTION_CAN_DELETE}
 
 
-def resource_name_for_dag(dag_id):
+def resource_name_for_dag(dag_id, is_subdag=False):
     """Returns the resource name for a DAG id."""
     if dag_id == RESOURCE_DAG:
         return dag_id
 
     if dag_id.startswith(RESOURCE_DAG_PREFIX):
         return dag_id
 
-    # To account for SubDags
-    root_dag_id = dag_id.split(".")[0]
-    return f"{RESOURCE_DAG_PREFIX}{root_dag_id}"
+    if is_subdag:
+        # To account for SubDags
+        root_dag_id = dag_id.split(".", 1)[0]

Review Comment:
   `parent_dag` is more expensive since it needs to load the entire DagModel 
object. Since this permission check is called a lot, I would prefer the check 
to be as light as possible. It would be better to use `root_dag_id` instead 
(which `parent_dag` is based on anyway!)



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