Prasanth345 opened a new pull request, #55194:
URL: https://github.com/apache/airflow/pull/55194
### What this PR does
Fixes an issue where operator extra links defined dynamically inside
`__init__` were not available in the `/links` API or the UI, because
they weren’t included in the serialized DAG.
This change makes the API fall back to runtime XCom entries
(`_link_*` keys) whenever links are missing or `None` in the task
definition.
### Why this change is needed
Before:
- Operators that defined `self.operator_extra_links = (...)` in
`__init__` did not display links in the Task Instance details page
or API.
- Dynamically-mapped tasks were particularly affected, as they never
serialized these links.
After:
- Links defined in `__init__` are correctly retrieved from XCom and
displayed in both the API and the UI.
- Works for both single tasks and dynamically-mapped tasks.
### Tests added
- `test_should_fallback_to_xcom_for_init_defined_links`
- `test_should_fallback_to_xcom_for_init_defined_links_mapped`
These confirm that runtime XCom links are returned correctly for both
single and mapped operators.
### Related issue
Closes https://github.com/apache/airflow/issues/54778
### Below find the screenshots
<img width="1777" height="539" alt="Screenshot from 2025-09-03 02-49-40"
src="https://github.com/user-attachments/assets/f858cf2e-d921-4c5f-8ae4-85ef78d93fe7";
/>
<img width="1777" height="539" alt="Screenshot from 2025-09-03 02-49-50"
src="https://github.com/user-attachments/assets/8f85b3e5-1c72-4b89-ba7e-72fdeddac89c";
/>
<img width="1777" height="539" alt="Screenshot from 2025-09-03 02-50-07"
src="https://github.com/user-attachments/assets/dc5866f9-93ff-497d-8c9b-e6a0e9ec13f9";
/>
<img width="1777" height="539" alt="Screenshot from 2025-09-03 02-50-18"
src="https://github.com/user-attachments/assets/104da985-ba8e-4e28-a9fa-27bd78ea960b";
/>
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