pateash commented on code in PR #24902:
URL: https://github.com/apache/airflow/pull/24902#discussion_r923436136
##########
airflow/sensors/external_task.py:
##########
@@ -143,18 +151,25 @@ def __init__(
if external_task_id is not None:
external_task_ids = [external_task_id]
- if external_task_ids:
+ if external_task_group_id and external_task_ids:
Review Comment:
this is to check if both values are set or not, we can't use
**exactly_one**, as if we do something like below,
```
if not exactly_one(external_task_group_id, *external_task_ids):
raise ValueError(
"Values for `external_task_group_id` and `external_task_id`
or `external_task_ids` "
"can't be set at the same time"
)
```
It will always fail whenever we have provides multiple values as
**external_task_ids** is a list.
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