sidshas03 opened a new pull request, #55746: URL: https://github.com/apache/airflow/pull/55746
### Problem Users can hit confusing failures when a single DAG tag exceeds 100 characters (DB-backed limit). The error surfaced late and wasn’t clearly documented. ### Changes - Add early tag-length validation in DAG creation paths (SDK DAG). - Raise `AirflowException` naming the offending tag and its actual length; preview long tags for readability. - Add a short “Tag limitations” note to the DAG docs (each tag ≤ 100 chars). ### Why safe - Aligns with existing schema (`dag_tag.name VARCHAR(100)`). - No migrations or behavior changes beyond clearer, earlier validation. ### Tests - Tag of exactly 100 chars → allowed. - Tag of 101 chars → raises `AirflowException` (message includes actual length and limit). - Multiple tags with one too long → raises; message identifies the problematic tag via preview. ### Docs - Added a concise “Tag limitations” subsection under core DAG concepts. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@airflow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
