54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
from __future__ import unicode_literals
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from django.conf import settings
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from django.utils import six
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from . import Error, Tags, register
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@register(Tags.urls)
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def check_url_config(app_configs, **kwargs):
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if getattr(settings, 'ROOT_URLCONF', None):
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from django.urls import get_resolver
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resolver = get_resolver()
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return check_resolver(resolver)
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return []
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def check_resolver(resolver):
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"""
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Recursively check the resolver.
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"""
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check_method = getattr(resolver, 'check', None)
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if check_method is not None:
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return check_method()
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elif not hasattr(resolver, 'resolve'):
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return get_warning_for_invalid_pattern(resolver)
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else:
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return []
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def get_warning_for_invalid_pattern(pattern):
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"""
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Return a list containing a warning that the pattern is invalid.
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describe_pattern() cannot be used here, because we cannot rely on the
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urlpattern having regex or name attributes.
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"""
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if isinstance(pattern, six.string_types):
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hint = (
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"Try removing the string '{}'. The list of urlpatterns should not "
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"have a prefix string as the first element.".format(pattern)
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)
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elif isinstance(pattern, tuple):
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hint = "Try using url() instead of a tuple."
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else:
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hint = None
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return [Error(
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"Your URL pattern {!r} is invalid. Ensure that urlpatterns is a list "
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"of url() instances.".format(pattern),
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hint=hint,
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id="urls.E004",
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)]
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