[Bug] TriggerDagRunLink is broken in AF3

[kandharvishnu]

Apache Airflow version

3.0.3

If "Other Airflow 2 version" selected, which one?

No response

What happened?

In Airflow3, this issue occurs in Astronomer deployment, but not in localhost.

The TriggerDagRunOperator is triggering task as expected. But the TriggerDagRunLink generated is broken.

This is because the last part of Base URL(d4e9jgmf) is missed when processed by urljoin

When I try to open it, the link is broken. The link is missing the full Base URL. It should be

https://1234.astronomer.run/d4e9jgmf/dags/example_astronauts/runs/manual__2025-08-07T06:22:12.080186+00:00

What you think should happen instead?

Instead, the link should open the downstream task correctly.

How to reproduce

• Use TriggerDagRunOperator to trigger a DagRun
• Then goto the details page and click the Triggered DAG button.

- The link generated is a broken one

Operating System

Debian

Versions of Apache Airflow Providers

No response

Deployment

Astronomer

Deployment details

No response

Anything else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct