Django: conflicting models in (third-party) application - django

Question

I integrated a third party app into my Django project, and only when I import it will I get this error message.
RuntimeError: Conflicting 'task' models in application 'django_q': <class 'django_q.models.Task'> and <class 'models.Task'>.
I'm puzzled because my app runs well withouth it so I wonder how it could be an error on my side. I'm only using the app in its most simple use case. My general question is then: how can I investigate ?
So the app is django-q, a task queue (github). I installed it and called it in its most simple usage, following the good documentation.
CACHE = {
'default': {
'BACKEND': 'django.core.cache.backends.db.DatabaseCache',
'LOCATION': 'cache_table',
}
}
Q_CLUSTER = {
'name': 'DjangORM_queue',
'workers': 4,
'timeout': 3600,
'retry': 4000,
# 'queue_limit': 50,
# 'bulk': 10,
'orm': 'default'
}
api.py:
# api.py
# not putting all imports or __init__.py
def myhook(task):
print task.result
import ipdb; ipdb.set_trace()
def mymethod(request, pk, **kwargs):
from django_q.tasks import async, result
async('models.MyModel.method', pk, hook='myhook', sync=True)
Now manage.py runserver is ok, until I call my api and it reaches tasks.async. Full stacktrace:
Traceback (most recent call last):
File "/home/[...]/django/core/handlers/base.py", line 132, in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/.../my-project/searchapp/models/api.py", line 965, in mymethod
tasks.async('models.MyModel.mymethod', pk, hook='myhook', sync=True)
File "/home/[...]/django_q/tasks.py", line 43, in async
return _sync(pack)
File "/home/[...]/django_q/tasks.py", line 176, in _sync
cluster.worker(task_queue, result_queue, Value('f', -1))
File "/home/[...]/django_q/cluster.py", line 369, in worker
m = importlib.import_module(module)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/home/[...]/django_q/models.py", line 15, in <module>
class Task(models.Model):
File "/home/[...]/django/db/models/base.py", line 309, in __new__
new_class._meta.apps.register_model(new_class._meta.app_label, new_class)
File "/home/[...]/django/apps/registry.py", line 221, in register_model
(model_name, app_label, app_models[model_name], model))
RuntimeError: Conflicting 'task' models in application 'django_q': <class 'django_q.models.Task'> and <class 'models.Task'>.
I first checked I don't have a model named Task, nor do my django installed apps. We don't.
I searched for a similar pb and found this SO answer, so I tried to tweak the imports of django-q, with no success (it doesn't mean I did it right though).
Is it a circular import (SO hint) ?
A Django bug report (which wasn't) is interesting also, I found comment 13 particarly (about double entries in sys.path and ways of import). My sys.path has [ my_project, …/site_packages/django_q, …/site_packages/] so I don't feel impacted by comment 13's description;
I couldn't reproduce the issue on a fresh django project;
I feel like trying another queuing system :/
Any hints on what could be wrong ?
Thanks !
ps: I could also point to my full repo

Answer 1

Too bad, I went with huey. It's simple and complete.
django-rq looks like a good solution too, with a django dashboard integration.