id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30453	Django's template library tags cant use already decorated things like lru_cache because of getfullargspec	Batuhan Taşkaya	Batuhan Taşkaya	"Django's template library tags cant use already decorated things like lru_cache because of getfullargspec. I have a tag that requires to be lru_cached but i cant use it without an helper.


{{{
The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File ""/usr/lib64/python3.7/threading.py"", line 917, in _bootstrap_inner
    self.run()
  File ""/usr/lib64/python3.7/threading.py"", line 865, in run
    self._target(*self._args, **self._kwargs)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/utils/autoreload.py"", line 54, in wrapper
    fn(*args, **kwargs)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/core/management/commands/runserver.py"", line 117, in inner_run
    self.check(display_num_errors=True)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/core/management/base.py"", line 390, in check
    include_deployment_checks=include_deployment_checks,
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/core/management/base.py"", line 377, in _run_checks
    return checks.run_checks(**kwargs)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/core/checks/registry.py"", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/contrib/admin/checks.py"", line 79, in check_dependencies
    for engine in engines.all():
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/utils.py"", line 90, in all
    return [self[alias] for alias in self]
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/utils.py"", line 90, in <listcomp>
    return [self[alias] for alias in self]
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/utils.py"", line 81, in __getitem__
    engine = engine_cls(params)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/backends/django.py"", line 25, in __init__
    options['libraries'] = self.get_templatetag_libraries(libraries)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/backends/django.py"", line 43, in get_templatetag_libraries
    libraries = get_installed_libraries()
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/backends/django.py"", line 108, in get_installed_libraries
    for name in get_package_libraries(pkg):
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/backends/django.py"", line 121, in get_package_libraries
    module = import_module(entry[1])
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/importlib/__init__.py"", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File ""<frozen importlib._bootstrap>"", line 1006, in _gcd_import
  File ""<frozen importlib._bootstrap>"", line 983, in _find_and_load
  File ""<frozen importlib._bootstrap>"", line 967, in _find_and_load_unlocked
  File ""<frozen importlib._bootstrap>"", line 677, in _load_unlocked
  File ""<frozen importlib._bootstrap_external>"", line 728, in exec_module
  File ""<frozen importlib._bootstrap>"", line 219, in _call_with_frames_removed
  File ""/home/batuhan/qubic/aspava/social/templatetags/renderer.py"", line 25, in <module>
    @lru_cache(None)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/library.py"", line 132, in simple_tag
    return dec(func)
  File ""/home/batuhan/.local/share/virtualenvs/aspava-SBPNYCrJ/lib/python3.7/site-packages/django/template/library.py"", line 109, in dec
    params, varargs, varkw, defaults, kwonly, kwonly_defaults, _ = getfullargspec(func)
  File ""/usr/lib64/python3.7/inspect.py"", line 1132, in getfullargspec
    raise TypeError('unsupported callable') from ex
TypeError: unsupported callable
}}}

It can be solved with unwrapping the function like templates/base.py did. "	Cleanup/optimization	closed	Template system	dev	Normal	fixed			Accepted	1	0	0	0	0	0