Python Celery - How to call celery tasks inside other task
12,233
Solution 1
This should work:
celery.current_app.send_task('mymodel.tasks.mytask', args=[arg1, arg2, arg3])
Solution 2
You are right, because each task in you for
loop will be overwrite task
variable.
You can try celery.group
like
from celery import group
and
@shared_task
def shipment_server(data,notification_type):
notification_obj = Notification.objects.get(name = notification_type)
server_list = ServerNotificationMapping.objects.filter(notification_name=notification_obj)
tasks = [post_notification.s(data, server.server_id.url) for server in server_list]
results = group(tasks)()
print results.get() # results.status() what ever you want
Solution 3
you can call task from a task using delay function
from app.tasks import celery_add_task
celery_add_task.apply_async(args=[task_name])
... it will work
Comments
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PythonEnthusiast almost 2 years
I'm calling a task within a tasks in Django-Celery
Here are my tasks.
@shared_task def post_notification(data,url): url = "http://posttestserver.com/data/?dir=praful" # when in production, remove this line. headers = {'content-type': 'application/json'} requests.post(url, data=json.dumps(data), headers=headers) @shared_task def shipment_server(data,notification_type): notification_obj = Notification.objects.get(name = notification_type) server_list = ServerNotificationMapping.objects.filter(notification_name=notification_obj) for server in server_list: task = post_notification.delay(data,server.server_id.url) print task.status # it prints 'Nonetype' has no attribute id
How can I call a task within a task? I read somewhere it can be done using
group
, but I'm not able to form the correct syntax. How do I do it?I tried this
for server in server_list: task = group(post_notification.s(data, server.server_id.url))().get() print task.status
Throws a warning saying
TxIsolationWarning: Polling results w│ ith transaction isolation level repeatable-read within the same transacti│ on may give outdated results. Be sure to commit the transaction for each │ poll iteration. │ 'Polling results with transaction isolation level '
Dont know what it is!!!
How do I solve my problem?