airflow.operators.latest_only

Contains an operator to run downstream tasks only for the latest scheduled DagRun.

Module Contents

Classes

LatestOnlyOperator

Skip tasks that are not running during the most recent schedule interval.
class airflow.operators.latest_only.LatestOnlyOperator(task_id, owner=DEFAULT_OWNER, email=None, email_on_retry=conf.getboolean('email', 'default_email_on_retry', fallback=True), email_on_failure=conf.getboolean('email', 'default_email_on_failure', fallback=True), retries=DEFAULT_RETRIES, retry_delay=DEFAULT_RETRY_DELAY, retry_exponential_backoff=False, max_retry_delay=None, start_date=None, end_date=None, depends_on_past=False, ignore_first_depends_on_past=DEFAULT_IGNORE_FIRST_DEPENDS_ON_PAST, wait_for_past_depends_before_skipping=DEFAULT_WAIT_FOR_PAST_DEPENDS_BEFORE_SKIPPING, wait_for_downstream=False, dag=None, params=None, default_args=None, priority_weight=DEFAULT_PRIORITY_WEIGHT, weight_rule=DEFAULT_WEIGHT_RULE, queue=DEFAULT_QUEUE, pool=None, pool_slots=DEFAULT_POOL_SLOTS, sla=None, execution_timeout=DEFAULT_TASK_EXECUTION_TIMEOUT, on_execute_callback=None, on_failure_callback=None, on_success_callback=None, on_retry_callback=None, on_skipped_callback=None, pre_execute=None, post_execute=None, trigger_rule=DEFAULT_TRIGGER_RULE, resources=None, run_as_user=None, task_concurrency=None, map_index_template=None, max_active_tis_per_dag=None, max_active_tis_per_dagrun=None, executor_config=None, do_xcom_push=True, multiple_outputs=False, inlets=None, outlets=None, task_group=None, doc=None, doc_md=None, doc_json=None, doc_yaml=None, doc_rst=None, task_display_name=None, logger_name=None, allow_nested_operators=True, **kwargs)[source]

Bases: airflow.operators.branch.BaseBranchOperator

Skip tasks that are not running during the most recent schedule interval.

If the task is run outside the latest schedule interval (i.e. external_trigger), all directly downstream tasks will be skipped.

Note that downstream tasks are never skipped if the given DAG_Run is marked as externally triggered.

ui_color = '#e9ffdb'[source]
choose_branch(context)[source]

Abstract method to choose which branch to run.

Subclasses should implement this, running whatever logic is necessary to choose a branch and returning a task_id or list of task_ids.

Parameters

context (airflow.utils.context.Context) – Context dictionary as passed to execute()

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