Is it possible to wait until celery group done?

manpreet Best Answer 2 years ago

I am trying to do group tasks and wait until all the group subtasks finished then run the last task. But when I call task it calls group and last tasks but the last task finished before group finish. Is it possible to wait until all the tasks inside group finish?

@shared_task(name="print")
def print_order():
    print("PRINT #1")
    mylist = [(1, 2), (4, 6), (1, 4)]
    group([(add.s(*i) | order_id_print.s()) for i in mylist]).delay()


@shared_task(name="print.add")
def add(x,y):
    print("ADD #2")
    chain(add_task1.s(x, y, 'task id') | add_task2.si(x, y, "task_id")).delay()
    return x+y

@shared_task(name="add_task_1")
def add_task1(order_id, ftype, task_id):
    print("ADD task #2-1")
    print("add tasks task1 order_id {} {} {}".format(order_id, ftype, task_id))

@shared_task(name="add_task_2")
def add_task2(order_id, ftype, task_id):
    print("ADD task #2-2")
    print("add tasks task2 order_id {} {} {}".format(order_id, ftype, task_id))


@shared_task(name="print.order_id_print")
def order_id_print(id):
    print("ORDER #3")
    print("order id is {}".format(id))