AttributeError: 'dict' object has no attribute 'app' with django

[stellasia]

Hi,

This project has not been updated for a while... Is it still compatible with latest celery releases (3.1.23 at the time of writing)?

FYI, when running the example below:

from celery.utils.log import get_task_logger
logger = get_task_logger(__name__)

from celery_tasktree import task_with_callbacks, TaskTree

@task_with_callbacks
def some_action(x):
    logger.info(x)

def execute_actions():
    tree = TaskTree()
    task0 = tree.add_task(some_action, kwargs={"x":"0"})
    task1 = tree.add_task(some_action, kwargs={"x":"1"})
    task10 = task1.add_task(some_action, kwargs={"x":"10"})
    task11 = task1.add_task(some_action, kwargs={"x":"11"})
    task110 = task11.add_task(some_action, kwargs={"x":"110"})
    async_result = tree.apply_async()
    return async_result

I got the following error :

[2016-09-05 16:56:27,481: WARNING/MainProcess] celery@pc ready.
[2016-09-05 16:56:32,449: INFO/MainProcess] Events of group {task} enabled by remote.
[2016-09-05 16:56:38,771: INFO/MainProcess] Received task: tasks.some_action[548166d1-5cad-4801-8792-1098d1f85198]
[2016-09-05 16:56:38,773: INFO/MainProcess] Received task: tasks.some_action[a9a89c44-6e78-46cc-906b-e12362396b57]
[2016-09-05 16:56:38,774: INFO/Worker-1] tasks.some_action[548166d1-5cad-4801-8792-1098d1f85198]: 0
[2016-09-05 16:56:38,774: INFO/Worker-4] tasks.some_action[a9a89c44-6e78-46cc-906b-e12362396b57]: 1
[2016-09-05 16:56:38,781: INFO/MainProcess] Task tasks.some_action[548166d1-5cad-4801-8792-1098d1f85198] succeeded in 0.00667091600189s: None
[2016-09-05 16:56:38,783: ERROR/MainProcess] Task tasks.some_action[a9a89c44-6e78-46cc-906b-e12362396b57] raised unexpected: AttributeError("'dict' object has no attribute 'app'",)
Traceback (most recent call last):
  File ".../local/lib/python2.7/site-packages/celery/app/trace.py", line 240, in trace_task
    R = retval = fun(*args, **kwargs)
  File ".../local/lib/python2.7/site-packages/celery/app/trace.py", line 438, in __protected_call__
    return self.run(*args, **kwargs)
  File ".../venv/local/lib/python2.7/site-packages/celery_tasktree.py", line 142, in wrapper
    async_result = _exec_callbacks(callback)
  File ".../venv/local/lib/python2.7/site-packages/celery_tasktree.py", line 160, in _exec_callbacks
    async_result = taskset.apply_async()
  File ".../local/lib/python2.7/site-packages/celery/canvas.py", line 502, in apply_async
    type = self.type
  File ".../local/lib/python2.7/site-packages/celery/canvas.py", line 569, in type
    return self.app.tasks[self['task']]
  File ".../local/lib/python2.7/site-packages/celery/canvas.py", line 560, in app
    return self._app or (self.tasks[0].app if self.tasks else current_app)
AttributeError: 'dict' object has no attribute 'app'

Thanks for any feedback!

[stellasia]

After more tests, the code above in a simple project works fine (even with last celery release!).
I still have the error when this code is run inside a django app.

[0x0elliot]

i know that this is a 6-year-old thread, but has anyone figured out an explanation for this yet?

[stellasia]

I don't really remember (not working anymore on the project that triggered the issue), but I don't think I ended up using this package in the end. It was probably replaced by this one: https://github.com/spotify/luigi