气流 - 如何获取当前 dag_run 的开始日期（不是特定任务）？

Question

Tasks 1, 2, 3, 4 in the same dag will insert to a db table. I then want task 7 to update the db table only for rows with timestamp >= the time of the start of the dagrun (not the start time of task 7).

Is there some jinja/kwarg/context macro i can use? I didn't see any example to get dagrun start_date (not exec date).

Answer 1

context变量包含许多包含任务上下文信息的变量，包括dag_run.start_date

context['dag_run'].start_date