Django with celery can't get result from backend

Question

My django project is cloned from Celery repo: https://github.com/celery/celery/tree/3.1/examples/django . In settings after const BROKER_URL I added

CELERY_RESULT_BACKEND = 'amqp://'

I'm trying task called 'add' from the project. Inside worker terminal result is ok but can't get it back. I call command something like this:

from demoapp.tasks import add
add.delay(2,2)
add.AsyncResult(a.task_id).get()

But don't know why I get error:

<ipython-input-3-5f18de09f6a1> in <module>()
----> 1 add.AsyncResult(a.task_id).get()

/home/t/py/django/celeryexample/venv/lib/python2.7/site-packages/celery/result.pyc in get(self, timeout, propagate, interval, no_ack, follow_parents, EXCEPTION_STATES, PROPAGATE_STATES)
    167             interval=interval,
    168             on_interval=on_interval,
--> 169             no_ack=no_ack,
    170         )
    171         if meta:

/home/t/py/django/celeryexample/venv/lib/python2.7/site-packages/celery/backends/base.pyc in _is_disabled(self, *args, **kwargs)
    595     def _is_disabled(self, *args, **kwargs):
    596         raise NotImplementedError(
--> 597             'No result backend configured.  '
    598             'Please see the documentation for more information.')
    599     wait_for = get_status = get_result = get_traceback = _is_disabled

NotImplementedError: No result backend configured.  Please see the documentation for more information

tstr · Accepted Answer · 2015-03-17 08:44:34Z

2

I ran task from ipython instead manage.py shell so that's the issue

answered Mar 17, 2015 at 8:44

tstr

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1 Comment

Vineeth Sai Over a year ago

Damn, I thought it works from a normal shell and was struggling to fix a non-existing problem.

Roshan Bagdiya · Accepted Answer · 2018-05-05 05:31:39Z

1

pip install 'django_celery_results'

add django_celery_results in INSTALLED_APPS in settings.py(it will create one table to store result)

Set celery result as below in settings.py of your procject

CELERY_RESULT_BACKEND = 'django-db'

python manage.py makemigrations
python manage.py migrate

restart worker ..Done

answered May 5, 2018 at 5:31

Roshan Bagdiya

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Saikiran Yerram · Accepted Answer · 2015-03-14 19:40:34Z

0

You're getting this error because you're setting the backend to use a AMPQ compatible backing storage, which you don't have. Usual AMPQ storage is RabbitMQ but there are others like ActiveMQ, Apollo etc.

I recommend not to use AMPQ for persistence, unless you have a dedicated server.

You can instead use a database or redis for storing the results. For testing purposes you can use SQLite,

CELERY_RESULT_BACKEND = 'db+sqlite:///results.db'

From celery docs

answered Mar 14, 2015 at 19:40

Saikiran Yerram

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1 Comment

tstr Over a year ago

i have AMPQ server, but when I changed to sqllite config I have the same error

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