josh-fell opened a new pull request #16875:
URL: https://github.com/apache/airflow/pull/16875
Related to #10285
- Updated example DAG files such that `xcom_pull()` calls use an operator's
`.output` property as well access of `TaskInstance` objects from context to use
`get_current_context()` function
- Added comments to which task dependencies, if any, are handled and/or
created via `XComArgs` for transparency
- Removed or refactored the `default_args` pattern where necessary as
requested by @ashb (i.e. removed a separated `default_args` declaration for
deference for declaration as part of the `DAG` object)
- Other miscellaneous updates based on `.output` refactoring
>**Note:** There are several instances where the `xcom_pull()` call was not
updated. These instances involve accessing a specific value within the `XCom`
or calling user-defined macros with an `XCom` value. Reference #16618 for an
open issue to enhance the `XComArg` functionality to provide similar behavior
as the classic `xcom_pull()` method.
> **Note:** Not all DAGs were tested functionally (i.e. with hard
integrations to source systems and executed), however each DAG was tested to
compile and generate a DAG graph as expected locally.
An detailed summary of all changes made as part of this PR can be found
below:
| DAG File | Converted `xcom_pull()`? | Other Updates? | Comments |
| ---------| ------------------------ | -------------- | -------- |
|
airflow/providers/google/cloud/example_dags/example_automl_nl_text_classification.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_nl_text_extraction.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_nl_text_sentiment.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_automl_tables.py | Yes
** | Yes | ** Current `XComArg` object does not support accessing specific
values of an iterable `XCom` value elegantly. Did not update the following
occurrences: <br/>`"{{
extract_object_id(task_instance.xcom_pull('list_tables_spec_task')[0])
}}"`<br/>`'{{ task_instance.xcom_pull("create_dataset_task")["name"]
}}'`</br>`"{{
get_target_column_spec(task_instance.xcom_pull('list_columns_spec_task'),
target) }}"`<br/><br/>All other `xcom_pull()` calls have been updated.
<br/><br/> Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_automl_translation.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_video_intelligence_classification.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_video_intelligence_tracking.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_vision_classification.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_automl_vision_object_detection.py
| Yes | Yes | Removed explicit task dependencies that are created via
`XComArgs`. |
|
airflow/providers/google/cloud/example_dags/example_azure_fileshare_to_gcs.py |
No | Yes | Refactored `default_args` pattern. |
| airflow/providers/google/cloud/example_dags/example_bigquery_dts.py | Yes
| Yes | Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_bigquery_operations.py
| No | No | Current `XComArg` object does not support accessing specific values
of an iterable `XCom` value elegantly. Did not update any occurrences in this
DAG. |
| airflow/providers/google/cloud/example_dags/example_bigquery_queries.py |
Yes | Yes | Added globals assignment so both example DAGs are exposed rather
than only the last one in the loop. |
| airflow/providers/google/cloud/example_dags/example_cloud_build.py | No |
No | Current `XComArg` object does not support accessing specific values of an
iterable `XCom` value elegantly. Did not update any occurrences in this DAG. |
| airflow/providers/google/cloud/example_dags/example_cloud_memorystore.py |
Yes ** | No | ** Current `XComArg` object does not support accessing specific
values of an iterable `XCom` value elegantly. Did not update this occurrence:
<br/>`"user-{{
task_instance.xcom_pull('get-instance')['persistence_iam_identity']"`
<br/><br/>All other `xcom_pull()` calls have been updated. |
| airflow/providers/google/cloud/example_dags/example_datacatalog.py | Yes
** | Yes | ** Current `XComArg` object does not support accessing specific
values of an iterable `XCom` value elegantly. Did not update this occurrence:
</br>`"echo \"{{ task_instance.xcom_pull('lookup_entry')['display_name'] }}\""`
<br/><br/>All other `xcom_pull()` calls have been updated. |
| airflow/providers/google/cloud/example_dags/example_cloud_sql.py | Yes |
Yes | Removed explicit task dependencies that are created via `XComArgs`.
</br></br>Removed duplicate/redundant task. |
|
airflow/providers/google/cloud/example_dags/example_cloud_storage_transfer_service_aws.py
| No | Yes | Current `XComArg` object does not support accessing specific
values of an iterable `XCom` value elegantly. Did not update any occurrences in
this DAG. </br></br>Removed unused `default_args` variable. |
|
airflow/providers/google/cloud/example_dags/example_cloud_storage_transfer_service_gcp.py
| No | No | Current `XComArg` object does not support accessing specific
values of an iterable `XCom` value elegantly. Did not update any occurrences in
this DAG. |
|
airflow/providers/google/cloud/example_dags/example_cloud_storage_transfer_service_gcp.py
| Yes ** | Yes | ** Current `XComArg` object does not support accessing
specific values of an iterable `XCom` value elegantly. Did not update this
occurrence: <br/>`"echo \"{{
task_instance.xcom_pull('lookup_entry')['display_name'] }}\""` </br></br>All
other `xcom_pull()` calls have been updated. |
| airflow/providers/google/cloud/example_dags/example_dataflow.py| No | No |
Current `XComArg` object does not support accessing specific values of an
iterable `XCom` value elegantly. Did not update any occurrences in this DAG. |
| airflow/providers/google/cloud/example_dags/example_dataproc.py | Yes |
Yes | Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_datastore.py | Yes **
| Yes | ** Current `XComArg` object does not support accessing specific values
of an iterable `XCom` value elegantly. Did not update these occurrences: </br>`
"{{task_instance.xcom_pull('export_task')['response']['outputUrl'].split('/')[2]
}}"` </br>`"{{
'/'.join(task_instance.xcom_pull('export_task')['response']['outputUrl'].split('/')[3:])
}}"` </br></br>All other `xcom_pull()` calls have been updated.
</br></br>Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_functions.py | No |
Yes | Added `default_args` to DAG as there was logic to populate the dict but
not being applied. |
| airflow/providers/google/cloud/example_dags/example_dlp.py | No | No |
Current `XComArg` object does not support accessing specific values of an
iterable `XCom` value elegantly. Did not update any occurrences in this DAG. |
| airflow/providers/google/cloud/example_dags/example_gcs.py | Yes | No ||
| airflow/providers/google/cloud/example_dags/example_kubernetes_engine.py |
No | No | Current `XComArg` object does not support accessing specific values
of an iterable `XCom` value elegantly. Did not update any occurrences in this
DAG. |
| airflow/providers/google/cloud/example_dags/example_mlengine.py | Yes |
Yes | Removed unneeded `default_args` pattern. |
| airflow/providers/google/cloud/example_dags/example_natural_language.py |
Yes | No ||
| airflow/providers/google/cloud/example_dags/example_pubsub.py | Yes ** |
Yes | ** Current `XComArg` object does not support accessing specific values of
an iterable `XCom` value elegantly. Did not update the following occurrence:
<br/>`"""{% for m in task_instance.xcom_pull('pull_messages') %} echo "AckID:
{{ m.get('ackId') }}, Base64-Encoded: {{ m.get('message') }}" {% endfor
%}"""`<br/><br/>All other `xcom_pull()` calls have been updated. <br/><br/>
Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_stackdriver.py | No |
No | Current `XComArg` object does not support accessing specific values of an
iterable `XCom` value elegantly. Did not update any occurrences in this DAG. |
| airflow/providers/google/cloud/example_dags/example_tasks.py | Yes | No ||
| airflow/providers/google/cloud/example_dags/example_translate.py | No | No
| Current `XComArg` object does not support accessing specific values of an
iterable `XCom` value elegantly. Did not update any occurrences in this DAG. |
| airflow/providers/google/cloud/example_dags/example_video_intelligence.py
| No | No | Current `XComArg` object does not support accessing specific values
of an iterable `XCom` value elegantly. Did not update any occurrences in this
DAG. |
| airflow/providers/google/cloud/example_dags/example_vision.py | Yes ** |
Yes | ** Current `XComArg` object does not support accessing specific values of
an iterable `XCom` value elegantly. Did not update the following occurrences:
<br/>`"echo {{
task_instance.xcom_pull('annotate_image')['logoAnnotations'][0]['description']
}}"` </br>`"echo {{
task_instance.xcom_pull('detect_text')['textAnnotations'][0] }}"` </br>`"echo
{{ task_instance.xcom_pull('document_detect_text')['textAnnotations'][0] }}"`
</br>`"echo {{ task_instance.xcom_pull('detect_labels')['labelAnnotations'][0]
}}"`<br/><br/>All other `xcom_pull()` calls have been updated. <br/><br/>
Removed explicit task dependencies that are created via `XComArgs`. |
| airflow/providers/google/cloud/example_dags/example_workflows.py | Yes |
Yes | Removed explicit task dependencies that are created via `XComArgs`. |
---
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