Schema can not created in v. 0.15.0

[AlexElizard]

Schema can not created in v. 0.15.0.
In version 0.14.0, the problem is missing

Traceback v0.15.0

Traceback (most recent call last):
  File "/lib/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "./lib/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "./lib/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "./lib/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "./lib/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "./lib/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "./lib/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "./lib/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "./lib/site-packages/drf_spectacular/views.py", line 67, in get
    return self._get_schema_response(request)
  File "./lib/site-packages/drf_spectacular/views.py", line 71, in _get_schema_response
    return Response(generator.get_schema(request=request, public=self.serve_public))
  File "./lib/site-packages/drf_spectacular/generators.py", line 242, in get_schema
    paths=self.parse(request, public),
  File "./lib/site-packages/drf_spectacular/generators.py", line 216, in parse
    operation = view.schema.get_operation(
  File "./lib/site-packages/drf_spectacular/openapi.py", line 57, in get_operation
    operation['operationId'] = self.get_operation_id()
  File "./lib/site-packages/drf_spectacular/openapi.py", line 281, in get_operation_id
    tokenized_path = self._tokenize_path()
  File "./lib/site-packages/drf_spectacular/openapi.py", line 304, in _tokenize_path
    path = re.sub(
  File "./python/python39/lib/re.py", line 210, in sub
    return _compile(pattern, flags).sub(repl, string, count)
  File "./python/python39/lib/re.py", line 304, in _compile
    p = sre_compile.compile(pattern, flags)
  File "./python/python39/lib/sre_compile.py", line 764, in compile
    p = sre_parse.parse(p, flags)
  File "./python/python39/lib/sre_parse.py", line 948, in parse
    p = _parse_sub(source, state, flags & SRE_FLAG_VERBOSE, 0)
  File "./python/python39/lib/sre_parse.py", line 443, in _parse_sub
    itemsappend(_parse(source, state, verbose, nested + 1,
  File "./python/python39/lib/sre_parse.py", line 511, in _parse
    sourceget()
  File "./python/python39/lib/sre_parse.py", line 256, in get
    self.__next()
  File "./python/python39/lib/sre_parse.py", line 245, in __next
    raise error("bad escape (end of pattern)",
re.error: bad escape (end of pattern) at position 1
[05/Apr/2021 10:50:13] "GET /swagger/schema/ HTTP/1.1" 500 176816

[tfranzel]

ahh i think i see the problem. we introduced automatic estimation of the path prefix and we missed accounting for variables.

in the meantime you can restore old behavior with setting 'SCHEMA_PATH_PREFIX': '' instead of the default None.

[tfranzel]

but it would be most helpful if you share how you paths look like to make sure we also cover your case.

[AlexElizard]

but it would be most helpful if you share how you paths look like to make sure we also cover your case.

Standard paths offered by django rest framework and django. For example

# ./news/urls.py
router = SimpleRouter()
router.register('', NewsViewSet)

urlpatterns = [
    path('categories/', CategoryListAPIView.as_view()),
    path('', include(router.urls)),
]


# project urls
urlpatterns = [
        path('news/', include('news.urls')),
    ])),
]


if 'ckeditor_uploader' in settings.INSTALLED_APPS:
    urlpatterns.append(path('api/ckeditor/', include('ckeditor_uploader.urls')))

if 'drf_spectacular' in settings.INSTALLED_APPS:
    from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView

    urlpatterns.append(
        path('swagger/', include([
            path('', SpectacularSwaggerView.as_view(url_name='schema'), name='swagger-ui'),
            path('schema/', SpectacularAPIView.as_view(), name='schema')
        ]))
    )

if settings.DEBUG:
    urlpatterns = urlpatterns + static(
        settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

    if 'debug_toolbar' in settings.INSTALLED_APPS:
        import debug_toolbar
        urlpatterns.append(path('__debug__/', include(debug_toolbar.urls)))

[AlexElizard]

ahh i think i see the problem. we introduced automatic estimation of the path prefix and we missed accounting for variables.

in the meantime you can restore old behavior with setting 'SCHEMA_PATH_PREFIX': '' instead of the default None.

It is not working. For now I will stay on version 0.14.0

SPECTACULAR_DEFAULTS = {
    'SCHEMA_PATH_PREFIX': '',
}

[tfranzel]

this must work as is turns off the introduced feature. SPECTACULAR_DEFAULTS is wrong in settings. SPECTACULAR_SETTINGS is the correct dictionary name. looks like the settings are not found.

can you install the master and test the bugfix (without the setting)? pip install -e git+https://github.com/tfranzel/drf-spectacular

[AlexElizard]

can you install the master and test the bugfix (without the setting)? pip install -e git+https://github.com/tfranzel/drf-spectacular

it is working

[tfranzel]

released 0.15.1