Question 121858 in Redis Question posted in
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Celery unable to use redis

Trying to start Celery first time but issues error as below,
i have installed redis and its starting fine , but still somehow django seems to have issues with it ,

File "<frozen importlib._bootstrap_external>", line 848, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/atif/Documents/celery_test/celery-env/lib/python3.8/site-packages/kombu/transport/redis.py", line 263, in <module>
    class PrefixedStrictRedis(GlobalKeyPrefixMixin, redis.Redis):
AttributeError: 'NoneType' object has no attribute 'Redis'

Celery.py

from django.conf import settings
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'celery_test.settings')



    app = Celery('celery_test',)
    
    app.config_from_object('django.conf:settings')
    
    # Load task modules from all registered Django apps.
    app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
    
    
    @app.task(bind=True)
    def debug_task(self):
        print(f'Request: {self.request!r}')

Settings

#celery stuff ---------------
BROKER_URL = 'redis://localhost:6379'
CELERY_RESULT_BACKEND = 'redis://localhost:6379'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_TASK_SERIALIZER = 'json'
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TIMEZONE = 'Asia/Kolkata'

celery_module/tasks.py

from celery import Celery

app = Celery('tasks',)

@app.task
def add(x, y):
    return x + y
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2

Answers


  1. 0

    Try to install Redis as in your virtual environment as well:

    pip install Redis
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  2. 0

    Install redis globally with

    pip install redis

    OR (if you use pipenv)

    The error in my case occurs as the redis package in the environment is not used when running

    python -m celery -A *django_app* worker

    If you use pipenv to manage you python environment you could run the command above as:

    pipenv run python -m celery -A *django_app* worker
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