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May 6, 2025
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Doc: Add REST API v2 (api/v2) entry in Release Notes #50264

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13 changes: 13 additions & 0 deletions RELEASE_NOTES.rst
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Expand Up @@ -555,6 +555,19 @@ The Airflow CLI has been split into two distinct interfaces:

This change improves security and modularity for deployments that use Airflow in a distributed or API-first context.

REST API v2 replaces v1
"""""""""""""""""""""""

The legacy REST API v1, previously built with Connexion and Marshmallow, has been replaced by a modern FastAPI-based REST API v2.

This new implementation improves performance, aligns more closely with web standards, and provides a consistent developer experience across the API and UI.

Key changes include stricter validation (422 errors instead of 400), the removal of the ``execution_date`` parameter in favor of ``logical_date``, and more consistent query parameter handling.

The v2 API is now the stable, fully supported interface for programmatic access to Airflow, and also powers the new UI - achieving full feature parity between the UI and API.

For details, see the :doc:`Airflow REST API v2 </stable-rest-api-ref>` documentation.

REST API: DAG Trigger Behavior Updated
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1 change: 1 addition & 0 deletions airflow-core/docs/installation/upgrading_to_airflow3.rst
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Expand Up @@ -143,6 +143,7 @@ These include:
- **CeleryKubernetesExecutor and LocalKubernetesExecutor**: Replaced by `Multiple Executor Configuration <https://airflow.apache.org/docs/apache-airflow/stable/core-concepts/executor/index.html#using-multiple-executors-concurrently>`_
- **SLAs**: Deprecated and removed; Will be replaced by forthcoming `Deadline Alerts <https://cwiki.apache.org/confluence/x/tglIEw>`_.
- **Subdir**: Used as an argument on many CLI commands, ``--subdir`` or ``-S`` has been superseded by :doc:`DAG bundles </administration-and-deployment/dag-bundles>`.
- **REST API** (``/api/v1``) replaced: Use the modern FastAPI-based stable ``/api/v2`` instead; see :doc:`Airflow API v2 </stable-rest-api-ref>` for details.
- **Some Airflow context variables**: The following keys are no longer available in a :ref:`task instance's context <templates:variables>`. If not replaced, will cause dag errors:
- ``tomorrow_ds``
- ``tomorrow_ds_nodash``
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1 change: 1 addition & 0 deletions docs/spelling_wordlist.txt
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Expand Up @@ -655,6 +655,7 @@ falsy
faq
Fargate
fargate
FastAPI
fastapi
fbee
fc
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4 changes: 2 additions & 2 deletions reproducible_build.yaml
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@@ -1,2 +1,2 @@
release-notes-hash: 4a33893e65bbabc29d00816684bb9b78
source-date-epoch: 1746029438
release-notes-hash: 1b9fae6db6fdad0ea37c6473561bca29
source-date-epoch: 1746549398