Celery 5.2.7: Error importing module celery_haystack.tasks: "No module named 'celery.task'"

[darkpixel]

Apparently newer versions of Celery dropped the task module.

Error from a test project:

>>> t = Ticket.objects.latest()
>>> t.description = 'test123'
>>> t.save()
Traceback (most recent call last):
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/utils.py", line 17, in get_update_task
    mod = import_module(module)
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/tasks.py", line 11, in <module>
    from celery.task import Task  # noqa
ModuleNotFoundError: No module named 'celery.task'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/tank/code/testproject/support/models.py", line 285, in save
    super().save(*args, **kwargs)
  File "/tank/code/testproject/support/models.py", line 64, in save
    super(BaseModel, self).save(*args, **kwargs)
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/django/db/models/base.py", line 814, in save
    self.save_base(
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/django/db/models/base.py", line 892, in save_base
    post_save.send(
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/django/dispatch/dispatcher.py", line 176, in send
    return [
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/django/dispatch/dispatcher.py", line 177, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/signals.py", line 21, in enqueue_save
    return self.enqueue('update', instance, sender, **kwargs)
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/signals.py", line 44, in enqueue
    enqueue_task(action, instance)
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/utils.py", line 41, in enqueue_task
    task = get_update_task()
  File "/home/aaron/.virtualenvs/testproject/lib/python3.10/site-packages/celery_haystack/utils.py", line 19, in get_update_task
    raise ImproperlyConfigured('Error importing module %s: "%s"' %
django.core.exceptions.ImproperlyConfigured: Error importing module celery_haystack.tasks: "No module named 'celery.task'"
>>>