airflow/models/taskinstance.py
def are_dependents_done(self, session=None):
        """
        Checks whether the dependents of this task instance have all succeeded.
        This is meant to be used by wait_for_downstream.

        This is useful when you do not want to start processing the next
        schedule of a task until the dependents are done. For instance,
        if the task DROPs and recreates a table.
        """
        task = self.task

        if not task.downstream_task_ids:
            return True

        ti = session.query(func.count(TaskInstance.task_id)).filter(
            TaskInstance.dag_id == self.dag_id,
            TaskInstance.task_id.in_(task.downstream_task_ids),
            TaskInstance.execution_date == self.execution_date,
            TaskInstance.state == State.SUCCESS,
        )
        count = ti[0][0]
        return count == len(task.downstream_task_ids)
def are_dependents_done(self, session=None):
        task = self.task

        if not task.downstream_task_ids:
            return True

        ti = session.query(func.count(TaskInstance.task_id)).filter(
            TaskInstance.dag_id == self.dag_id,
            TaskInstance.task_id.in_(task.downstream_task_ids),
            TaskInstance.execution_date == self.execution_date,
            TaskInstance.state == State.SUCCESS,
        )
        count = ti[0][0]
        return count == len(task.downstream_task_ids)
def are_dependents_done ( self , session = None ) : task = self . task if not task . downstream_task_ids : return True ti = session . query ( func . count ( TaskInstance . task_id ) ) . filter ( TaskInstance . dag_id == self . dag_id , TaskInstance . task_id . in_ ( task . downstream_task_ids ) , TaskInstance . execution_date == self . execution_date , TaskInstance . state == State . SUCCESS , ) count = ti [ 0 ] [ 0 ] return count == len ( task . downstream_task_ids )
Checks whether the dependents of this task instance have all succeeded.
        This is meant to be used by wait_for_downstream.

        This is useful when you do not want to start processing the next
        schedule of a task until the dependents are done. For instance,
        if the task DROPs and recreates a table.
Checks whether the dependents of this task instance have all succeeded . This is meant to be used by wait_for_downstream .