I created a new fresh django project. I created an app inside the django project and then tried to install django-debug-toolbar. I followed the instructions from the official docs. When I point to the app url I got Error during template rendering: 'set' object is not reversible
The files from the base project urls.py and settings.py were modified as follows:
#urls.py
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('meetings/', include('meetings.urls')),
path('__debug__/', include('debug_toolbar.urls'))
]
#settings.py
#...
DEBUG = True
#...
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'meetings',
'debug_toolbar'
]
#...
MIDDLEWARE = [
'debug_toolbar.middleware.DebugToolbarMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
#...
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',
],
},
},
]
#...
INTERNAL_IPS = [
'127.0.0.1'
]
The config files for the app "meetings" have the following configuration:
#urls.py
from django.urls import path
from . import views
urlpatterns = {
path('hello/', views.say_hello)
}
#views.py
from django.shortcuts import render
from django.http import HttpResponse
def say_hello(request):
return render(request, 'hello.html', {'name': 'PE'})
<!--template/hello.html-->
<html>
<head>
<title>Welcome</title>
</head>
<body>
{% if name %}
<h1>Hello {{ name }}</h1>
{% else %}
<h1>Hello world</h1>
{% endif %}
</body>
</html>
When I start the server and go to the url http://127.0.0.1:8000/meetings/hello I get the following error (I simplified the path to the .venv folder):
Error during template rendering
In template (...)/.venv/lib/python3.10/site-packages/debug_toolbar/templates/debug_toolbar/base.html, error at line 12
'set' object is not reversible
Here is some more context for this error:
Request Method: GET
Request URL: http://127.0.0.1:8000/meetings/hello/
Django Version: 4.1.5
Python Version: 3.10.6
Template error:
In template (...)/.venv/lib/python3.10/site-packages/debug_toolbar/templates/debug_toolbar/base.html, error at line 12
'set' object is not reversible
2 : {% block css %}
3 : <link rel="stylesheet" href="{% static 'debug_toolbar/css/print.css' %}" media="print">
4 : <link rel="stylesheet" href="{% static 'debug_toolbar/css/toolbar.css' %}">
5 : {% endblock %}
6 : {% block js %}
7 : <script type="module" src="{% static 'debug_toolbar/js/toolbar.js' %}" async></script>
8 : {% endblock %}
9 : <div id="djDebug" class="djdt-hidden" dir="ltr"
10 : {% if not toolbar.should_render_panels %}
11 : data-store-id="{{ toolbar.store_id }}"
12 : data-render-panel-url=" {% url 'djdt:render_panel' %} "
13 : {% endif %}
14 : {% url 'djdt:history_sidebar' as history_url %}
15 : {% if history_url %}
16 : data-sidebar-url="{{ history_url }}"
17 : {% endif %}
18 : data-default-show="{% if toolbar.config.SHOW_COLLAPSED %}false{% else %}true{% endif %}"
19 : {{ toolbar.config.ROOT_TAG_EXTRA_ATTRS|safe }}>
20 : <div class="djdt-hidden" id="djDebugToolbar">
21 : <ul id="djDebugPanelList">
22 : <li><a id="djHideToolBarButton" href="#" title="{% trans 'Hide toolbar' %}">{% trans "Hide" %} »</a></li>
Traceback (most recent call last):
File "(...)/.venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "(...)/.venv/lib/python3.10/site-packages/debug_toolbar/middleware.py", line 74, in __call__
rendered = toolbar.render_toolbar()
File "(...)/.venv/lib/python3.10/site-packages/debug_toolbar/toolbar.py", line 82, in render_toolbar
return render_to_string("debug_toolbar/base.html", context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/loader.py", line 62, in render_to_string
return template.render(context, request)
File "(...)/.venv/lib/python3.10/site-packages/django/template/backends/django.py", line 62, in render
return self.template.render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 175, in render
return self._render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/test/utils.py", line 111, in instrumented_test_render
return self.nodelist.render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
return SafeString("".join([node.render_annotated(context) for node in self]))
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
return self.render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/defaulttags.py", line 322, in render
return nodelist.render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in render
return SafeString("".join([node.render_annotated(context) for node in self]))
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 1005, in <listcomp>
return SafeString("".join([node.render_annotated(context) for node in self]))
File "(...)/.venv/lib/python3.10/site-packages/django/template/base.py", line 966, in render_annotated
return self.render(context)
File "(...)/.venv/lib/python3.10/site-packages/django/template/defaulttags.py", line 472, in render
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "(...)/.venv/lib/python3.10/site-packages/django/urls/base.py", line 54, in reverse
app_list = resolver.app_dict[ns]
File "(...)/.venv/lib/python3.10/site-packages/django/urls/resolvers.py", line 633, in app_dict
self._populate()
File "(...)/.venv/lib/python3.10/site-packages/django/urls/resolvers.py", line 570, in _populate
url_pattern._populate()
File "/(...)/.venv/lib/python3.10/site-packages/django/urls/resolvers.py", line 543, in _populate
for url_pattern in reversed(self.url_patterns):
Exception Type: TypeError at /meetings/hello/
Exception Value: 'set' object is not reversible
urlpatterns in meetings/urls.py should be a list:
urlpatterns = [
path('hello/', views.say_hello)
]