jason810496 opened a new pull request, #64615:
URL: https://github.com/apache/airflow/pull/64615
* closes: #64613
* related: #64598
## Why
Trigger kwargs stored in the old serialization format (e.g., `{"__type":
"tuple", "__var": [1, 2]}`) fail to deserialize because `_convert` preserves
the short type name
(`"tuple"`) while the serde deserializer only recognizes fully-qualified
names (`"builtins.tuple"`), causing an `ImportError` that cascades into a
`KeyError` on the
`BaseSerialization` fallback path.
## What
- Add `OLD_TYPE_TO_QUALNAME` dict to shared/serialization mapping `tuple` ->
`builtins.tuple`, `set` -> `builtins.set`, `frozenset` -> `builtins.frozenset`,
`timedelta` -> `datetime.timedelta`
- Update `_convert` in `task-sdk/src/airflow/sdk/serde/__init__.py` to
resolve old type names via the mapping before constructing the new-format dict
- Add tests for old-format deserialization of builtin collections (`tuple`,
`set`, `frozenset`), nested old-format tuples inside dicts, and old-format
`timedelta`
##### Was generative AI tooling used to co-author this PR?
- [x] Yes (please specify the tool below)
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