FrankYang0529 opened a new pull request, #74075: URL: https://github.com/apache/airflow/pull/74075
Implement [Go SDK: Add dag.If with Then and Else](https://github.com/orgs/apache/projects/499/views/7?pane=issue&itemId=248987170). - `dag.If(fn, opts...)` returns an `*airflow.IfRef` and adds a task that runs the condition function `fn`. `fn` returns `(bool, error)`. It follows the same rules as a function passed to `dag.Task`. `IfRef.Then` and `IfRef.Else` take the `*airflow.TaskRef` of the task to run on each side. - When `fn` returns `true`, the condition task skips the task from `Else`. When `fn` returns `false`, the condition task skips the task from `Then`. When `fn` returns an error, the condition task fails. - The condition task writes the skipped task_ids to the `skipmixin_key` XCom before it sends `SkipDownstreamTasks`. `NotPreviouslySkippedDep` reads that XCom when someone clears a skipped task. When `fn` returns `true` and there is no task from `Else`, the condition task writes `{"skipped": []}`. <!-- 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]
