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From GitBox <...@apache.org>
Subject [GitHub] seelmann closed pull request #3540: [AIRFLOW-2639] Dagrun of subdags is set to RUNNING immediately
Date Mon, 17 Sep 2018 19:25:25 GMT
seelmann closed pull request #3540: [AIRFLOW-2639] Dagrun of subdags is set to RUNNING immediately
URL: https://github.com/apache/incubator-airflow/pull/3540
 
 
   

This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:

As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):

diff --git a/airflow/api/common/experimental/trigger_dag.py b/airflow/api/common/experimental/trigger_dag.py
index 86be6aa544..256a642ec6 100644
--- a/airflow/api/common/experimental/trigger_dag.py
+++ b/airflow/api/common/experimental/trigger_dag.py
@@ -61,22 +61,14 @@ def _trigger_dag(
     if conf:
         run_conf = json.loads(conf)
 
-    triggers = list()
-    dags_to_trigger = list()
-    dags_to_trigger.append(dag)
-    while dags_to_trigger:
-        dag = dags_to_trigger.pop()
-        trigger = dag.create_dagrun(
-            run_id=run_id,
-            execution_date=execution_date,
-            state=State.RUNNING,
-            conf=run_conf,
-            external_trigger=True,
-        )
-        triggers.append(trigger)
-        if dag.subdags:
-            dags_to_trigger.extend(dag.subdags)
-    return triggers
+    trigger = dag.create_dagrun(
+        run_id=run_id,
+        execution_date=execution_date,
+        state=State.RUNNING,
+        conf=run_conf,
+        external_trigger=True,
+    )
+    return trigger
 
 
 def trigger_dag(
@@ -88,7 +80,7 @@ def trigger_dag(
 ):
     dagbag = DagBag()
     dag_run = DagRun()
-    triggers = _trigger_dag(
+    trigger = _trigger_dag(
         dag_id=dag_id,
         dag_run=dag_run,
         dag_bag=dagbag,
@@ -98,4 +90,4 @@ def trigger_dag(
         replace_microseconds=replace_microseconds,
     )
 
-    return triggers[0] if triggers else None
+    return trigger
diff --git a/airflow/operators/subdag_operator.py b/airflow/operators/subdag_operator.py
index 052095e2a6..0bffc961a8 100644
--- a/airflow/operators/subdag_operator.py
+++ b/airflow/operators/subdag_operator.py
@@ -98,6 +98,7 @@ def __init__(
 
     def execute(self, context):
         ed = context['execution_date']
+        conf = context['dag_run'].conf
         self.subdag.run(
             start_date=ed, end_date=ed, donot_pickle=True,
-            executor=self.executor)
+            executor=self.executor, conf=conf)
diff --git a/tests/api/common/experimental/trigger_dag_tests.py b/tests/api/common/experimental/trigger_dag_tests.py
index d6354840e2..0517599e4c 100644
--- a/tests/api/common/experimental/trigger_dag_tests.py
+++ b/tests/api/common/experimental/trigger_dag_tests.py
@@ -77,7 +77,7 @@ def test_trigger_dag_include_subdags(self, dag_bag_mock, dag_run_mock, dag_mock)
         dag2.subdags = []
         dag_mock.subdags = [dag1, dag2]
 
-        triggers = _trigger_dag(
+        trigger = _trigger_dag(
             dag_id,
             dag_bag_mock,
             dag_run_mock,
@@ -86,7 +86,7 @@ def test_trigger_dag_include_subdags(self, dag_bag_mock, dag_run_mock, dag_mock)
             execution_date=None,
             replace_microseconds=True)
 
-        self.assertEqual(3, len(triggers))
+        self.assertTrue(trigger)
 
 
 if __name__ == '__main__':
diff --git a/tests/operators/subdag_operator.py b/tests/operators/subdag_operator.py
index af47c5cfd5..8436588053 100644
--- a/tests/operators/subdag_operator.py
+++ b/tests/operators/subdag_operator.py
@@ -19,12 +19,12 @@
 
 import unittest
 
-from mock import Mock
+from mock import Mock, MagicMock
 
 import airflow
 from airflow.exceptions import AirflowException
 from airflow.executors.sequential_executor import SequentialExecutor
-from airflow.models import DAG, DagBag
+from airflow.models import DAG, DagBag, DagRun
 from airflow.operators.dummy_operator import DummyOperator
 from airflow.operators.subdag_operator import SubDagOperator
 from airflow.utils.timezone import datetime
@@ -150,3 +150,25 @@ def test_subdag_executor(self):
         subdag_good = DAG('parent.test', default_args=default_args)
         subdag = SubDagOperator(task_id='test', dag=dag, subdag=subdag_good)
         self.assertEqual(type(subdag.executor), SequentialExecutor)
+
+    def test_forwards_dag_run_conf(self):
+        """
+        Tests that the parent's dag run conf is forwarded to the subdag
+        """
+        dag = DAG('parent', default_args=default_args)
+        subdag = DAG('parent.test', default_args=default_args)
+        subdag.run = MagicMock()
+
+        subdag_op = SubDagOperator(task_id='test', dag=dag, subdag=subdag)
+        ed = DEFAULT_DATE
+        dr = DagRun()
+        dr.conf = {'a': 'foo', 'b': 1, 'c': True, 'd': [1, 2, 3]}
+        context = dict(
+            execution_date=ed,
+            dag_run=dr
+        )
+        subdag_op.execute(context)
+
+        # expect sudgag.run was called with the parent's conf
+        subdag.run.assert_called_once_with(start_date=ed, end_date=ed, donot_pickle=True,
+                                           executor=subdag_op.executor, conf=dr.conf)


 

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