FrankYang0529 opened a new pull request, #74321: URL: https://github.com/apache/airflow/pull/74321
Implement [Go SDK: Add dag.Switch with Case](https://github.com/orgs/apache/projects/499/views/7?pane=issue&itemId=248987183). - `dag.Switch(fn, opts...)` and `TaskGroupRef.Switch` add a task that runs the decider function `fn`, and return an `*airflow.SwitchRef`. `fn` returns `(*airflow.TaskRef, error)`. - `SwitchRef.Case(task)` names a task that the decider can choose and records the edge from the decider to that task. `Case` returns the switch, so one statement can name every case: `dag.Switch(pickPath).Case(long).Case(short)`. - When the decider returns a case, the decider task pushes the task_id of that case as its own `return_value` XCom. The decider task then writes the task_ids of the other cases to the `skipmixin_key` XCom and skips those cases. - When the decider returns a `*airflow.TaskRef` that is not a case, the decider task fails and pushes no XCom. <!-- SPDX-License-Identifier: Apache-2.0 https://www.apache.org/licenses/LICENSE-2.0 --> <!-- Thank you for contributing! Please provide above a brief description of the changes made in this pull request. Write a good git commit message following this guide: https://chris.beams.io/posts/git-commit/ Please make sure that your code changes are covered with tests. And in case of new features or big changes remember to adjust the documentation. For user-facing UI changes, please attach before/after screenshots (or a short screen recording) so reviewers can assess the visual impact. Feel free to ping (in general) for the review if you do not see reaction for a few days (72 Hours is the minimum reaction time you can expect from volunteers) - we sometimes miss notifications. In case of an existing issue, reference it using one of the following: * closes: #ISSUE * related: #ISSUE --> --- ##### Was generative AI tooling used to co-author this PR? <!-- If generative AI tooling has been used in the process of authoring this PR, please change below checkbox to `[X]` followed by the name of the tool, uncomment the "Generated-by". --> - [X] Yes - Claude Code <!-- Generated-by: [Tool Name] following [the guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions) --> --- * Read the **[Pull Request Guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#pull-request-guidelines)** for more information. Note: commit author/co-author name and email in commits become permanently public when merged. * For fundamental code changes, an Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals)) is needed. * When adding dependency, check compliance with the [ASF 3rd Party License Policy](https://www.apache.org/legal/resolved.html#category-x). * For significant user-facing changes create newsfragment: `{pr_number}.significant.rst`, in [airflow-core/newsfragments](https://github.com/apache/airflow/tree/main/airflow-core/newsfragments). You can add this file in a follow-up commit after the PR is created so you know the PR number. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
