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

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