Celery beat with method tasks not working
celery, celerybeat, python
Solution
The problem is that Celerybeat will not instantiate X before calling the method. The task_method filter defaults to calling the unbound method if the method is not bound to an object.
My question is, what are you trying to accomplish here? X has no state, so why not use a module-evel function?
Problem
I'm trying to run celerybeat on a method task, and can't get anything to work out properly. Here's an example setup: ``` from celery.contrib.methods import task_method from celery import Celery, current_app celery=celery('tasks', broker='amqp://guest@localhost//') celery.config_from_object("celeryconfig") class X(object): @celery.task(filter=task_method, name="X.ppp") def ppp(self): print "ppp" ``` and my celeryconfig.py file is ``` from datetime import timedelta CELERYBEAT_SCHEDULE = { 'test' : { 'task' : 'X.ppp', 'schedule' : timedelta(seconds=5) }, } ``` When I run `celery beat`, I'm getting errors like: ``` task X.ppp raised exception, TypeError('ppp() takes exactly 1 argument, (0 given) ``` When I turn the method into a normal function and decorate it with `@celery.task', it does work, so the rest of the setup seems to be working. I see the caveats in the docs about method tasks, but can't really sort out where the problem is. Does anyone know how to resolve this?