#24922: Templates: conflicting settings should emit a system check error
-------------------------------------+-------------------------------------
Reporter: sergei-maertens | Owner: sergei-
| maertens
Type: Bug | Status: assigned
Component: Core (System | Version: master
checks) |
Severity: Normal | Resolution:
Keywords: templates, system | Triage Stage:
check | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Description changed by sergei-maertens:
Old description:
> I discovered that specifying the templates settings as following, raises
> an error when rendering the template:
>
> {{{#!python
> TEMPLATES = [
> {
> 'BACKEND': 'django.template.backends.django.DjangoTemplates',
> 'DIRS': [],
> 'APP_DIRS': True,
> 'OPTIONS': {
> 'context_processors': [
> 'django.template.context_processors.debug',
> 'django.template.context_processors.request',
> 'django.contrib.auth.context_processors.auth',
> 'django.contrib.messages.context_processors.messages',
> ],
> },
> 'loaders': [
> ('django.template.loaders.cached.Loader', [
> 'django.template.loaders.filesystem.Loader',
> 'django.template.loaders.app_directories.Loader',
> ]),
> ],
> },
> ]
> }}}
>
> Error:
> {{{
> Traceback (most recent call last):
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/core/handlers/wsgi.py", line 189, in __call__
> response = self.get_response(request)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/core/handlers/base.py", line 218, in get_response
> response = self.handle_uncaught_exception(request, resolver,
> sys.exc_info())
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/core/handlers/base.py", line 268, in
> handle_uncaught_exception
> return callback(request, **param_dict)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/utils/decorators.py", line 110, in _wrapped_view
> response = view_func(request, *args, **kwargs)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/views/defaults.py", line 42, in server_error
> template = loader.get_template(template_name)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/loader.py", line 29, in get_template
> engines = _engine_list(using)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/loader.py", line 144, in _engine_list
> return engines.all() if using is None else [engines[using]]
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/utils.py", line 110, in all
> return [self[alias] for alias in self]
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/utils.py", line 101, in __getitem__
> engine = engine_cls(params)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/backends/django.py", line 24, in __init__
> self.engine = Engine(self.dirs, self.app_dirs, **options)
> File "/home/modelbrouw/.virtualenvs/staging/lib/python2.7/site-
> packages/django/template/engine.py", line 36, in __init__
> "app_dirs must not be set when loaders is defined.")
> django.core.exceptions.ImproperlyConfigured: app_dirs must not be set
> when loaders is defined.
> }}}
New description:
I discovered that specifying the templates settings as following, raises
an error when rendering the template:
{{{#!python
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
'loaders': [
('django.template.loaders.cached.Loader', [
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
]),
],
},
},
]
}}}
urls.py:
{{{#!python
from django.conf.urls import include, url
from django.contrib import admin
from django.views.generic import TemplateView
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^$', TemplateView.as_view(template_name='test.html')),
]
}}}
Test template is just an empty file
Error:
{{{
Environment:
Request Method: GET
Request URL: http://localhost:8000/
Django Version: 1.8.2
Python Version: 3.4.3
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware')
Traceback:
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/core/handlers/base.py" in get_response
164. response = response.render()
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/response.py" in render
158. self.content = self.rendered_content
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/response.py" in rendered_content
133. template = self._resolve_template(self.template_name)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/response.py" in _resolve_template
88. new_template = self.resolve_template(template)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/response.py" in resolve_template
78. return loader.select_template(template,
using=self.using)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/loader.py" in select_template
57. engines = _engine_list(using)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/loader.py" in _engine_list
144. return engines.all() if using is None else [engines[using]]
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/utils.py" in all
110. return [self[alias] for alias in self]
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/utils.py" in <listcomp>
110. return [self[alias] for alias in self]
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/utils.py" in __getitem__
101. engine = engine_cls(params)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/backends/django.py" in __init__
24. self.engine = Engine(self.dirs, self.app_dirs, **options)
File "/home/bbt/coding/.virtualenvs/tpl_app_dirs/lib/python3.4/site-
packages/django/template/engine.py" in __init__
36. "app_dirs must not be set when loaders is
defined.")
Exception Type: ImproperlyConfigured at /
Exception Value: app_dirs must not be set when loaders is defined.
}}}
--
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Ticket URL: <https://code.djangoproject.com/ticket/24922#comment:2>
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