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Reverse for 'pages-details-by-slug' with arguments '()' and keyword arguments '{'slug': ''}' not found.

See original GitHub issue

I made a simple local test. Pages looks like this:

snapshot1

I request /de/blog/ and get the error:

Reverse for 'pages-details-by-slug' with arguments '()' and keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['en/(?P<slug>[0-9A-Za-z-_.//]+)/$']

The blog page looks like this:

So you see, the EN title & slug is empty. But the page is published in de and en. Maybe this is the error? But this should not happen, isn’t it?

complete traceback:

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/de/blog/?edit&language=de

Django Version: 1.7.4
Python Version: 3.4.0
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.admin',
 'django.contrib.sites',
 'django.contrib.sitemaps',
 'django.contrib.staticfiles',
 'django.contrib.messages',
 'cms',
 'djangocms_admin_style',
 'djangocms_text_ckeditor',
 'menus',
 'sekizai',
 'mptt',
 'djangocms_file',
 'djangocms_link',
 'djangocms_picture',
 'djangocms_video',
 'cmsplugin_htmlsitemap',
 'cmsplugin_pygments',
 'reversion',
 'reversion_compare',
 'compressor',
 'django_extensions',
 'filer',
 'easy_thumbnails',
 'cmsplugin_filer_image',
 'parler',
 'taggit',
 'taggit_autosuggest',
 'django_select2',
 'meta',
 'meta_mixin',
 'admin_enhancer',
 'djangocms_blog',
 'django_info_panel',
 'pylucid',
 'example_project',
 'debug_toolbar',
 'pylucid_migration')
Installed Middleware:
('debug_toolbar.middleware.DebugToolbarMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.locale.LocaleMiddleware',
 'django.middleware.doc.XViewMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'cms.middleware.user.CurrentUserMiddleware',
 'cms.middleware.page.CurrentPageMiddleware',
 'cms.middleware.toolbar.ToolbarMiddleware',
 'cms.middleware.language.LanguageCookieMiddleware')


Template error:
In template /home/jens/page_instance_sqlite/example_project/templates/base.html, error at line 24
   Reverse for 'pages-details-by-slug' with arguments '()' and keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['en/(?P<slug>[0-9A-Za-z-_.//]+)/$']
   14 :     <title>{% block title %}{% page_attribute page_title %}{% if site_settings.site.name %} - {{ site_settings.site.name }}{% endif %}{% endblock title %}</title>


   15 : 


   16 :     {% compress css %}


   17 :         <link href="{% static "css/bootstrap.min.css" %}" rel="stylesheet">


   18 :         <link href="{% static "css/styles.css" %}" rel="stylesheet">


   19 :     {% endcompress %}


   20 :     {% render_block "css" %}


   21 :   </head>


   22 : 


   23 :   <body>


   24 :      {% cms_toolbar %} 


   25 :     <div class="container">


   26 : 


   27 :       <!-- Static navbar -->


   28 :       <div class="navbar navbar-default" role="navigation">


   29 :         <div class="container-fluid">


   30 :           <div class="navbar-header">


   31 :             <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">


   32 :               <span class="sr-only"></span>


   33 :               <span class="icon-bar"></span>


   34 :               <span class="icon-bar"></span>


Traceback:
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  137.                 response = response.render()
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/response.py" in render
  103.             self.content = self.rendered_content
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/response.py" in rendered_content
  80.         content = template.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/base.py" in render
  148.             return self._render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/test/utils.py" in instrumented_test_render
  88.     return self.nodelist.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/loader_tags.py" in render
  126.         return compiled_parent._render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/test/utils.py" in instrumented_test_render
  88.     return self.nodelist.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/classytags/core.py" in render
  106.         return self.render_tag(context, **kwargs)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/sekizai/templatetags/sekizai_tags.py" in render_tag
  79.         rendered_contents = nodelist.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/base.py" in render
  844.                 bit = self.render_node(node, context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/template/debug.py" in render_node
  80.             return node.render(context)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/classytags/core.py" in render
  106.         return self.render_tag(context, **kwargs)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/templatetags/cms_tags.py" in render_tag
  665.             toolbar.populate()
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/toolbar/toolbar.py" in populate
  238.         self._call_toolbar('populate')
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/toolbar/toolbar.py" in _call_toolbar
  285.                 result = getattr(toolbar, func_name)()
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/cms_toolbar.py" in populate
  107.         self.add_language_menu()
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/cms_toolbar.py" in add_language_menu
  179.                     url = DefaultLanguageChanger(self.request)(code)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/menus/utils.py" in __call__
  144.         return '%s%s' % (self.get_page_path(lang), self.app_path)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/menus/utils.py" in get_page_path
  111.                         return page.get_absolute_url(language=lang, fallback=True)
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/cms/models/pagemodel.py" in get_absolute_url
  162.         return reverse('pages-details-by-slug', kwargs={"slug": path})
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/core/urlresolvers.py" in reverse
  551.     return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "/home/jens/PyLucid_env/lib/python3.4/site-packages/django/core/urlresolvers.py" in _reverse_with_prefix
  468.                              (lookup_view_s, args, kwargs, len(patterns), patterns))

Exception Type: NoReverseMatch at /de/blog/
Exception Value: Reverse for 'pages-details-by-slug' with arguments '()' and keyword arguments '{'slug': ''}' not found. 1 pattern(s) tried: ['en/(?P<slug>[0-9A-Za-z-_.//]+)/$']

Issue Analytics

State:
Created 9 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

3reactions

wanaryytelcommented, Jul 11, 2018

This still happens when you call get_absolute_url from shell when you have multilang slugs and you don’t specify a language for the method.

    def get_absolute_url(self, language=None, fallback=True):
        if not language:
            language = get_language()
        with i18n.force_language(language):
            if self.is_home:
                return reverse('pages-root')
            path = self.get_path(language, fallback) or self.get_slug(language, fallback)
            return reverse('pages-details-by-slug', kwargs={"slug": path})

The get_language() is supposed to be a fallback, but get_language() returns None in shell for understandable reasons. I would reopen this and add a check for the case where get_language() returns nothing.

1reaction

eimsbushcommented, Jan 10, 2020

I could fix this by adding fallback languages to the cms-language settings. You need at least your primary language as fallback to the foreign languages in order to ne able to render the toolbar. For me site 3 had the problem. When you always edit and create english pages you need to put english to all other languages as fallback.

CMS_LANGUAGES = {
    'default': {
        'public': True,
        'redirect_on_fallback': False,
        'hide_untranslated': False,
    },
    1: [
        {
            'code': 'de',
            'name': 'Deutsch',
            'fallbacks': ['en', ],
        },
        {
            'code': 'en',
            'name': 'English',
            'fallbacks': ['de', ],
        },
        {
            'code': 'fr',
            'name': 'Français',
            'fallbacks': ['en', 'de'],
        },
        {
            'code': 'it',
            'name': 'Italiano',
            'fallbacks': ['en', 'fr', 'de'],
        },
    ],
    2: [
        {
            'code': 'es',
            'name': 'Español',
        },
    ],
    3: [
        {
            'code': 'de',
            'name': 'Deutsch',
            'fallbacks': ['en', ],
        },
        {
            'code': 'en',
            'name': 'English',
            'fallbacks': ['de', ],
        },
        {
            'code': 'fr',
            'name': 'Français',
            'fallbacks': ['en', 'de'],
        },
        {
            'code': 'it',
            'name': 'Italiano',
            'fallbacks': ['en', 'fr', 'de'],
        },
        {
            'code': 'nl',
            'name': 'Nederlands',
            'fallbacks': ['en', 'fr', 'de'],
        },
        {
            'code': 'bg',
            'name': 'български',
            'fallbacks': ['en', 'fr', 'de'],
        },
        {
            'code': 'da',
            'name': 'Dansk',
            'fallbacks': ['en', 'fr', 'de'],
        },
    ],
}```