Jack Evans Jack Evans - 4 months ago 64
Python Question

Django Celery Received unregistered task of type 'appname.tasks.add'

Following the documentation and the Demo Djagno project here https://github.com/celery/celery/tree/3.1/examples/django

Project Structure

piesup2
|
\piesup2
| |__init__.py
| |celery.py
| |settings.py
| |urls.py
\reports
|tasks.py
|models.py
|etc....


My Code

piesup2/celery.py


from __future__ import absolute_import

import os

from celery import Celery

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'piesup2.settings')

from django.conf import settings # noqa

app = Celery('piesup2')

# Using a string here means the worker will not have to
# pickle the object when using Windows.
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)


@app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))


piesup2/__init__.py


from __future__ import absolute_import

# This will make sure the app is always imported when
# Django starts so that shared_task will use this app.
from .celery import app as celery_app # noqa


piesup2/reports/tasks.py


from __future__ import absolute_import

from celery import shared_task


@shared_task
def add(x, y):
return x + y


After Starting Celery from the command line with:

celery -A piesup2 worker -l info


When I attempt to run a task from within my models.py file like this:

def do_stuff(self):
from reports.tasks import add
number = add.delay(2, 2)
print(number)


I get the following error:


[2016-08-05 16:50:31,625: ERROR/MainProcess] Received unregistered
task of type 'reports.tasks.add'. The message has been ignored and
discarded.

Did you remember to import the module containing this task? Or maybe
you are using relative imports? Please see http://docs.celeryq.org/en/latest/userguide/tasks.html#task-names for
more information.

The full contents of the message body was: {'callbacks': None,
'retries': 0, 'chord': None, 'errbacks': None, 'task':
'reports.tasks.add', 'args': [2, 2], 'timelimit': [None, None],
'kwargs': {}, 'id': 'b12eb387-cf8c-483d-b53e-f9ce0ad6b421', 'taskset':
None, 'eta': None, 'expires': None, 'utc': True} (258b) Traceback
(most recent call last): File
"/home/jwe/piesup2/venv/lib/python3.4/site-packages/celery/worker/consumer.py",
line 456, in on_task_received
strategies[name](message, body, KeyError: 'reports.tasks.add'

Answer

In your django settings you need to add each module that has a celery task to CELERY_IMPORTS

CELERY_IMPORTS = ) 'reports.tasks', 'some_app.some_module', )