AttributeError: module 'module' has no attribute 'celery'

Question

I want to use celery in my Django app for a task that should run in the background. I've followed these tutorials Asynchronous Tasks With Django and Celery and First steps with Django Using Celery with Django

my project structure:

project
├──project
|  ├── settings
|     ├──__init__.py   (empty)
|     ├──base.py
|     ├──development.py
|     └──production.py
|  ├──__init__.py
|  └──celery.py
├──app_number_1
|  └──tasks.py

project/project/init.py :

from __future__ import absolute_import, unicode_literals

# 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

__all__ = ['celery_app']

project/project/celery.py :

from __future__ import absolute_import, unicode_literals
import os
from celery import Celery

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings.production')

app = Celery('project')
app.config_from_object('django.conf:settings', namespace='CELERY')
app.autodiscover_tasks()

project/project/settings/production.py :

INSTALLED_APPS = [
    'background_task',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.gis',
]
.
.
.
CELERY_BROKER_URL = 'mongodb://mongo:27017'
CELERY_RESULT_BACKEND = 'mongodb://mongo:27017'
CELERY_ACCEPT_CONTENT = ['application/json']
CELERY_RESULT_SERIALIZER = 'json'
CELERY_TASK_SERIALIZER = 'json'

docker-compose.yml:

version: '3'

services:
  web:
    env_file:
      - env_vars.env
    build: .
    restart: always
    command:
      - /code/runserver.sh
    ports:
      - "80:8000"
    depends_on:
      - db
      - mongo

  db:
    ...

  mongo:
    image: mongo:latest
    restart: always

runserver.sh:

#!/bin/bash
sleep 1
python3 /code/project/manage.py migrate --settings=project.settings.production
python3 /code/project/manage.py runserver 0.0.0.0:8000 --settings=project.settings.production & celery -A project worker -Q celery

after docker-compose up --build I get the following error:

web_1    | Running migrations:
web_1    |   No migrations to apply.
mongo_1  | 2019-08-28T10:24:26.478+0000 I  NETWORK  [conn2] end connection 172.18.0.4:42252 (1 connection now open)
mongo_1  | 2019-08-28T10:24:26.479+0000 I  NETWORK  [conn1] end connection 172.18.0.4:42250 (0 connections now open)
web_1    | Error: 
web_1    | Unable to load celery application.
web_1    | Module 'project' has no attribute 'celery'

any hint will be great!

thanks

Answer 1

The celery module isn't contained in the first project folder.

You can either move it there or make project into a package by adding an __init__ module and setting the app instance module in the celery command to be:

celery -A project.project worker -Q celery