I am trying to setup this basic example from the following doc:
But so far I keep getting the below error:
AttributeError: 'Flask' object has no attribute 'user_options'
I am using celery 3.1.15.
from celery import Celery
def make_celery(app):
celery = Celery(app.import_name, broker=app.config['CELERY_BROKER_URL'])
celery.conf.update(app.config)
TaskBase = celery.Task
class ContextTask(TaskBase):
abstract = True
def __call__(self, *args, **kwargs):
with app.app_context():
return TaskBase.__call__(self, *args, **kwargs)
celery.Task = ContextTask
return celery
Example:
from flask import Flask
app = Flask(__name__)
app.config.update(
CELERY_BROKER_URL='redis://localhost:6379',
CELERY_RESULT_BACKEND='redis://localhost:6379'
)
celery = make_celery(app)
@celery.task()
def add_together(a, b):
return a + b
Traceback error:
Traceback (most recent call last):
File "/usr/local/bin/celery", line 11, in <module>
sys.exit(main())
File "/usr/local/lib/python2.7/dist-packages/celery/__main__.py", line 30, in main
main()
File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 81, in main
cmd.execute_from_commandline(argv)
File "/usr/local/lib/python2.7/dist-packages/celery/bin/celery.py", line 769, in execute_from_commandline
super(CeleryCommand, self).execute_from_commandline(argv)))
File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 305, in execute_from_commandline
argv = self.setup_app_from_commandline(argv)
File "/usr/local/lib/python2.7/dist-packages/celery/bin/base.py", line 473, in setup_app_from_commandline
user_preload = tuple(self.app.user_options['preload'] or ())
AttributeError: 'Flask' object has no attribute 'user_options'
The Flask Celery Based Background Tasks page (http://flask.pocoo.org/docs/patterns/celery/) suggests this to start celery:
celery -A your_application worker
The your_application string has to point to your application’s package or module that creates the celery object.
Assuming the code resides in application.py, explicitly pointing to the celery object (not just the module name) avoided the error:
celery -A application.celery worker