#34707 closed Uncategorized (invalid)
AttributeError: 'function' object has no attribute 'cache_clear' when registering a custom lookup
Reported by: | Justin Michalicek | Owned by: | nobody |
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Component: | Uncategorized | Version: | 4.1 |
Severity: | Normal | Keywords: | |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
Going from the documentation at https://docs.djangoproject.com/en/4.1/howto/custom-lookups/#a-lookup-example, I created the custom lookup exactly as shown there. I then registered it in an AppConfig.ready(). When django starts I get the exception AttributeError: 'function' object has no attribute 'cache_clear'
.
python manage.py runserver 0.0.0.0:8000 timestamp=None level=None event='Watching for file changes with StatReloader' logger=None Exception in thread django-main-thread: Traceback (most recent call last): File "/usr/local/lib/python3.11/threading.py", line 1038, in _bootstrap_inner self.run() File "/app/.venv/lib/python3.11/site-packages/sentry_sdk/integrations/threading.py", line 72, in run reraise(*_capture_exception()) File "/app/.venv/lib/python3.11/site-packages/sentry_sdk/_compat.py", line 60, in reraise raise value File "/app/.venv/lib/python3.11/site-packages/sentry_sdk/integrations/threading.py", line 70, in run return old_run_func(self, *a, **kw) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/threading.py", line 975, in run self._target(*self._args, **self._kwargs) File "/app/.venv/lib/python3.11/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/app/.venv/lib/python3.11/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run autoreload.raise_last_exception() File "/app/.venv/lib/python3.11/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception raise _exception[1] File "/app/.venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 398, in execute autoreload.check_errors(django.setup)() File "/app/.venv/lib/python3.11/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/app/.venv/lib/python3.11/site-packages/django/__init__.py", line 24, in setup apps.populate(settings.INSTALLED_APPS) File "/app/.venv/lib/python3.11/site-packages/django/apps/registry.py", line 124, in populate app_config.ready() File "/app/app/my_project/core/apps.py", line 13, in ready Field.register_lookup(NotEqual) File "/app/.venv/lib/python3.11/site-packages/django/db/models/query_utils.py", line 256, in register_lookup cls._clear_cached_lookups() File "/app/.venv/lib/python3.11/site-packages/django/db/models/query_utils.py", line 247, in _clear_cached_lookups subclass.get_lookups.cache_clear() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'function' object has no attribute 'cache_clear'
Change History (1)
comment:1 by , 14 months ago
Resolution: | → invalid |
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Status: | new → closed |
Version 0, edited 14 months ago by (next)
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Registering custom lookups in an app config's ready works ok for me. You may need to paste copies of your code/setup to show how you're registering it.
Additionally you can seek help from a wider audience using one of the Django support channels: https://www.djangoproject.com/community/ You'll need