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While working on: #59711, realised that serde doesn't support serialisation and deserialisation of uuid objects, which initially was done by BaseSerialialisation.

BaseSerialization just did a stringify on uuid / objects it didnt know about: https://github.com/astronomer/airflow/blob/main/airflow-core/src/airflow/serialization/serialized_objects.py#L685-L689

This would lead to loss of type on deserialization / round trip would be affected.

PyDev console: using IPython 9.8.0
Python 3.13.3 (main, Apr  8 2025, 13:54:08) [Clang 17.0.0 (clang-1700.0.13.3)] on darwin
import uuid
u = uuid.uuid4()
from airflow.serialization.serialized_objects import BaseSerialization
BaseSerialization.serialize(u)
Out[9]: '901190bc-6633-4b2b-aa0d-dab01e40415a'
BaseSerialization.deserialize(BaseSerialization.serialize(u))
Out[10]: '901190bc-6633-4b2b-aa0d-dab01e40415a'
BaseSerialization.deserialize(BaseSerialization.serialize(u)) == u
Out[11]: False

I decided to write a serde serializer for this which would do it better. We stringify, yes, but we maintain the type info and deserialize better now.

u = uuid.uuid4()
from airflow.sdk.serde import serialize, deserialize
serialize(u)
Out[5]: 
{'__classname__': 'uuid.UUID',
 '__version__': 1,
 '__data__': '901190bc-6633-4b2b-aa0d-dab01e40415a'}
deserialize(serialize(u))
Out[6]: UUID('901190bc-6633-4b2b-aa0d-dab01e40415a')
u
Out[7]: UUID('901190bc-6633-4b2b-aa0d-dab01e40415a')

^ Add meaningful description above
Read the Pull Request Guidelines for more information.
In case of fundamental code changes, an Airflow Improvement Proposal (AIP) is needed.
In case of a new dependency, check compliance with the ASF 3rd Party License Policy.
In case of backwards incompatible changes please leave a note in a newsfragment file, named {pr_number}.significant.rst or {issue_number}.significant.rst, in airflow-core/newsfragments.

@amoghrajesh amoghrajesh merged commit ee5e21b into apache:main Dec 24, 2025
99 checks passed
@amoghrajesh amoghrajesh deleted the uuid-serializer branch December 24, 2025 14:24
Subham-KRLX pushed a commit to Subham-KRLX/airflow that referenced this pull request Jan 2, 2026
stegololz pushed a commit to stegololz/airflow that referenced this pull request Jan 9, 2026
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2 participants