pytest==6.1.0: processing filter warnings is done before django.setup() #874
Description
Lauching pytest results in the following error:
pytest test_foo.py click to expand
Traceback (most recent call last): File "/home/presto/.virtualenvs/presto/bin/pytest", line 8, in sys.exit(console_main()) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 187, in console_main code = main() File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 143, in main config = _prepareconfig(args, plugins) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 318, in _prepareconfig config = pluginmanager.hook.pytest_cmdline_parse( File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/hooks.py", line 286, in __call__ return self._hookexec(self, self.get_hookimpls(), kwargs) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/manager.py", line 93, in _hookexec return self._inner_hookexec(hook, methods, kwargs) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/manager.py", line 84, in self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall( File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 203, in _multicall gen.send(outcome) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/helpconfig.py", line 100, in pytest_cmdline_parse config = outcome.get_result() # type: Config File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result raise ex[1].with_traceback(ex[2]) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 187, in _multicall res = hook_impl.function(*args) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1003, in pytest_cmdline_parse self.parse(args) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1280, in parse self._preparse(args, addopts=addopts) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1186, in _preparse self.hook.pytest_load_initial_conftests( File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/hooks.py", line 286, in __call__ return self._hookexec(self, self.get_hookimpls(), kwargs) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/manager.py", line 93, in _hookexec return self._inner_hookexec(hook, methods, kwargs) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/manager.py", line 84, in self._inner_hookexec = lambda hook, methods, kwargs: hook.multicall( File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 208, in _multicall return outcome.get_result() File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 80, in get_result raise ex[1].with_traceback(ex[2]) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/pluggy/callers.py", line 182, in _multicall next(gen) # first yield File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/warnings.py", line 136, in pytest_load_initial_conftests with catch_warnings_for_item( File "/usr/lib/python3.8/contextlib.py", line 113, in __enter__ return next(self.gen) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/warnings.py", line 52, in catch_warnings_for_item apply_warning_filters(config_filters, cmdline_filters) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1602, in apply_warning_filters warnings.filterwarnings(*parse_warning_filter(arg, escape=False)) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/_pytest/config/__init__.py", line 1576, in parse_warning_filter category = warnings._getcategory( File "/usr/lib/python3.8/warnings.py", line 260, in _getcategory m = __import__(module, None, None, [klass]) File "/home/presto/Projects/sandbox/pytest_bug_warning/bunny/models.py", line 10, in class Bunny(models.Model): File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/django/db/models/base.py", line 108, in __new__ app_config = apps.get_containing_app_config(module) File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/django/apps/registry.py", line 253, in get_containing_app_config self.check_apps_ready() File "/home/presto/.virtualenvs/presto/lib/python3.8/site-packages/django/apps/registry.py", line 136, in check_apps_ready raise AppRegistryNotReady("Apps aren't loaded yet.") django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. The project is straighforward.
We created the following Warning and Model:
from django.db import models # Create your models here. class CarrotWarning(RuntimeWarning): pass class Bunny(models.Model): passAnd use the following setup.cfg:
[tool:pytest] filterwarnings = ignore::bunny.models.CarrotWarning The bug was introduced by pytest==6.1.0, it worked fine with pytest==6.0.2.
We get that it seems to be introduced by pytest itself, but as its django-related, we assume that the fix will be in pytest-django.
We would guess from the changelog that it's linked to this issue : pytest-dev/pytest#6681