potiuk opened a new pull request, #74829:
URL: https://github.com/apache/airflow/pull/74829
`GET .../xcomEntries/{key}?deserialize=true` renders stored values with
`stringify()`, but fell back to `XComModel.deserialize_value()` for any
`airflow.*` class. That fallback runs full serde in the API server just to
turn
the result back into a string for the response. The API server only needs the
readable form, so it does not have to rebuild the objects at all. This
follows
the "full serde shouldn't run on the API server" direction from the review
of #73625, and matches the scheduler-side change in #72718.
`stringify()` now renders `airflow.*` classes from their serialized fields,
without importing them. For attrs/dataclass types like `Asset` and
`AssetAlias`, the output is the same `repr`-style text as before, e.g.
`AssetAlias(name='x', group='asset')`. Nested non-Airflow classes keep the
existing `module.Class@version=N(...)` form. Because nothing raises
`StringifyNotSupportedError` any more, the fallback is removed from the XCom
endpoint and the `XComOperatorLink` extra-link lookup.
Response shapes and the OpenAPI schema are unchanged. `deserialize=false` and
`stringify=true` behave as before. The Execution API write path is untouched.
Tests:
- `uv run pytest` for the XCom route tests (90 passed), `test_stringify.py`
(53 passed), `test_operatorlink.py` (2 passed), `test_extra_links.py`
(28 passed) and `utils/test_json.py` (11 passed)
- The new route, stringify and operator-link tests fail without the change
- `prek run --files` on the changed files: all hooks pass except
`Generate the FastAPI API spec`, which needs the Breeze CI image. The
change
does not touch any route signature or datamodel.
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---
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* For fundamental code changes, an Airflow Improvement Proposal
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You can add this file in a follow-up commit after the PR is created so you
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