Hi Tim,
As far as I understand, when adding an argument with `argparser` without
dashes, argparse interprets it as a positional argument and not an option,
which is how it works when you call it from the terminal.
However, calling `call_command` with args instead of keyword arguments
seems to skip that step, so thanks!
And checking again the documentation for call_command it is true that the
examples reflect that although this error message is indeed very obscure.
How can we improve this error reporting on the code side so that it's not
as obscure?
Thanks a lot,
Ferran
Missatge de Tim Graham <timogra...@gmail.com> del dia dg., 2 d’oct. 2022 a
les 21:39:
> Hi Ferran,
>
> It looks like opt.option_strings is empty because "poll_ids" (in
> parser.add_argument()) isn't prefixed with a dash or double dash.
>
> You could instead use call_command() like this: call_command("closepoll",
> 1)
>
> But I think your invocation could be fixed (or at least not fail so
> obscurely).
> On Sunday, October 2, 2022 at 7:49:26 AM UTC-4 Ferran Jovell wrote:
>
>> Hello everyone,
>>
>> I was working on a admin command today, and when setting up tests and
>> fixtures for running the command during testing I found this error:
>>
>> Traceback (most recent call last):
>> File "/home/fjm/code/django-stuff/tutorial/polls/tests.py", line 10, in
>> test_command_output
>> call_command("closepoll", poll_ids=1, stdout=out)
>> File
>> "/home/fjm/.local/share/virtualenvs/tutorial/lib/python3.10/site-packages/django/core/management/__init__.py",
>> line 168, in call_command
>> parse_args.append(min(opt.option_strings), default=0)
>> ValueError: min() arg is an empty sequence
>>
>> However, what is weird is that when run from with the manage.py script,
>> everything seems to be working just fine.
>>
>> This is the command code
>>
>> from django.core.management.base import BaseCommand
>>
>>
>> class Command(BaseCommand):
>> def add_arguments(self, parser):
>> parser.add_argument("poll_ids", nargs="+", type=int)
>>
>> def handle(self, *args, **options):
>> pass
>>
>> And this is the test code:
>> from io import StringIO
>>
>> from django.core.management import call_command
>> from django.test import SimpleTestCase
>>
>>
>> class ClosepollTest(SimpleTestCase):
>> def test_command_output(self):
>> out = StringIO()
>> call_command("closepoll", poll_ids=1, stdout=out)
>> self.assertIn("Expected output", out.getvalue())
>>
>> I set up a repo with the minimal code to reproduce this:
>> https://github.com/mrswats/django-polls-test
>> Is this a bug? Am I doing something wrong? Have I missed anything?
>>
>> I checked the bug tracker but could not find anything related to this and
>> before opening an issue I figured I'd ask. If it is indeed a bug I will
>> happily write a ticket in the tracker.
>>
>> Thanks in advance.
>>
>> --
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