ValueError('need more than 1 value to unpack',)

[rwoloszyn]

I am testing django-q as production msg que and schedule library. I made simple function:

@login_required
def makea_math(request):
    resp = {}
    resp['retrr'] = result(async('math_task', '123131.12312'), 100)
return HttpResponse(json.dumps(resp), content_type="application/json")
...
def math_task(number):
    return math.ceil(number)

but each time I get the error from broker:
ValueError('need more than 1 value to unpack'

Is there any way to debug or check broker logs and check what went wrong ?

I am running Django : 1.9.6
Django REST framework: 3.3.2

[thinkwelltwd]

I would check the resulting Task object that was created; I've gotten that error when the task had no args / kwargs.

[qb1989]

I just implemented your code snippet and debugged it.
The error comes not from the Broker but from the Cluster itself in line:360
Seems like there are some probs on how the functions (eg. math_task) are imported cause there is no problem with your code when you create a task.py which contains all your django_q tasks.

So maybe try to create a task.py file containing all your tasks and execute them like this:
async('examplepath.tasks.math_task', 123131.12312)

[Koed00]

yes @qb1989 is right.

You either reference the function directly without quotes:

@login_required
def makea_math(request):
    resp = {}
    resp['retrr'] = result(async(math_task, '123131.12312'), 100)
return HttpResponse(json.dumps(resp), content_type="application/json")

This works fine with local functions and classes.

Or you have to use the full paths to the functions:

@login_required
def makea_math(request):
    resp = {}
    resp['retrr'] = result(async('my_project.views.math_task', '123131.12312'), 100)
return HttpResponse(json.dumps(resp), content_type="application/json")

This is what I tend to do all the time.

The reason you see that error, is cause you are feeding the result function the import error as its first parameter.

[rwoloszyn]

@ Koed00 thanks. That was exactly the issue. I managed to fix this before your answer but thanks
for help anyway.

[Koed00]

Awesome. Sorry, sometimes I don't respond as fast as I'd like to.
Enjoy 👍

[sato-s]

This library is very useful and I really appreciate for it.
But, this behavior is completely cryptic.

In my case.

async('async_tasks.finish_practice', 3, sync=True)

results in No module named 'async_tasks'

async(async_tasks.finish_practice, 3, sync=True)

works without problem.

Could you reopen and shed light on this issue?

• Python 3.6.2
• django-q 0.9.0
• django 2.0

[Koed00]

If you are going to use the quoted path you will have to include the base module:

async('my_main_module.tasks.async_tasks.finish_practice', 3, sync=True)

That string needs to be importable from the root.