Studied the tutorial up to the seventh part. Everything was fine until I decided to launch my application. After launch, I added a multiple choice question. The error occurs after I click on a question to answer it. Long searches for an answer did not bring any results. Please help.
I get this error:
TemplateDoesNotExist at /polls/1/
polls/question_detail.html
Request Method: GET
Request URL: http://127.0.0.1:8000/polls/1/
Django Version: 4.0.dev20210118085850
Exception Type: TemplateDoesNotExist
Exception Value:
polls/question_detail.html
Exception Location: c:usersmranddjangodjangoemplateloader.py, line 47, in select_template
Python Executable: C:UsersmrandAnaconda3envsmysitepython.exe
Python Version: 3.8.6
Python Path:
['C:\Users\mrand\mysite',
'C:\Users\mrand\Anaconda3\envs\mysite\python38.zip',
'C:\Users\mrand\Anaconda3\envs\mysite\DLLs',
'C:\Users\mrand\Anaconda3\envs\mysite\lib',
'C:\Users\mrand\Anaconda3\envs\mysite',
'C:\Users\mrand\Anaconda3\envs\mysite\lib\site-packages',
'c:\users\mrand\django',
'C:\Users\mrand\Anaconda3\envs\mysite\lib\site-packages\win32',
'C:\Users\mrand\Anaconda3\envs\mysite\lib\site-packages\win32\lib',
'C:\Users\mrand\Anaconda3\envs\mysite\lib\site-packages\Pythonwin']
Server time: Wed, 27 Jan 2021 01:15:15 +0300
Traceback:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/polls/1/
Django Version: 4.0.dev20210118085850
Python Version: 3.8.6
Installed Applications:
['polls.apps.PollsConfig',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles']
Installed Middleware:
['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']
Template loader postmortem
Django tried loading these templates, in this order:
Using engine django:
* django.template.loaders.filesystem.Loader: C:Usersmrandmysiteemplatespollsquestion_detail.html (Source does not exist)
* django.template.loaders.app_directories.Loader: C:Usersmrandmysitepollsemplatespollsquestion_detail.html (Source does not exist)
* django.template.loaders.app_directories.Loader: c:usersmranddjangodjangocontribadminemplatespollsquestion_detail.html (Source does not exist)
* django.template.loaders.app_directories.Loader: c:usersmranddjangodjangocontribauthemplatespollsquestion_detail.html (Source does not exist)
Traceback (most recent call last):
File "c:usersmranddjangodjangocorehandlersexception.py", line 47, in inner
response = get_response(request)
File "c:usersmranddjangodjangocorehandlersase.py", line 204, in _get_response
response = response.render()
File "c:usersmranddjangodjangoemplate
esponse.py", line 105, in render
self.content = self.rendered_content
File "c:usersmranddjangodjangoemplate
esponse.py", line 81, in rendered_content
template = self.resolve_template(self.template_name)
File "c:usersmranddjangodjangoemplate
esponse.py", line 63, in resolve_template
return select_template(template, using=self.using)
File "c:usersmranddjangodjangoemplateloader.py", line 47, in select_template
raise TemplateDoesNotExist(', '.join(template_name_list), chain=chain)
Exception Type: TemplateDoesNotExist at /polls/1/
Exception Value: polls/question_detail.html
Views.py
from django.shortcuts import render
# Create your views here.
from django.http import HttpResponse
def vote(request, question_id):
return HttpResponse("You're voting on question %s." % question_id)
from django.http import HttpResponse
from django.template import loader
from .models import Question
def index(request):
latest_question_list = Question.objects.order_by('-pub_date')[:5]
template = loader.get_template('polls/index.html')
context = {
'latest_question_list': latest_question_list,
}
return HttpResponse(template.render(context, request))
# Leave the rest of the views (detail, results, vote) unchanged
from django.http import Http404
from django.shortcuts import render
from .models import Question
# ...
def detail(request, question_id):
try:
question = Question.objects.get(pk=question_id)
except Question.DoesNotExist:
raise Http404("Question does not exist")
return render(request, 'polls/detail.html', {'question': question})
from django.shortcuts import get_object_or_404, render
from .models import Question
# ...
def detail(request, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(request, 'polls/detail.html', {'question': question})
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import get_object_or_404, render
from django.urls import reverse
from .models import Choice, Question
# ...
def vote(request, question_id):
question = get_object_or_404(Question, pk=question_id)
try:
selected_choice = question.choice_set.get(pk=request.POST['choice'])
except (KeyError, Choice.DoesNotExist):
# Redisplay the question voting form.
return render(request, 'polls/detail.html', {
'question': question,
'error_message': "You didn't select a choice.",
})
else:
selected_choice.votes += 1
selected_choice.save()
# Always return an HttpResponseRedirect after successfully dealing
# with POST data. This prevents data from being posted twice if a
# user hits the Back button.
return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))
from django.shortcuts import get_object_or_404, render
def results(request, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(request, 'polls/results.html', {'question': question})
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404, render
from django.urls import reverse
from django.views import generic
from .models import Choice, Question
import datetime
from django.utils import timezone
class IndexView(generic.ListView):
template_name = 'polls/index.html'
context_object_name = 'latest_question_list'
def get_queryset(self):
"""
Return the last five published questions (not including those set to be
published in the future).
"""
return Question.objects.filter(
pub_date__lte=timezone.now()
).order_by('-pub_date')[:5]
class DetailView(generic.DetailView):
model = Question
template_name = 'polls/detail.html'
class ResultsView(generic.DetailView):
model = Question
template_name = 'polls/results.html'
def vote(request, question_id):
... # same as above, no changes needed.
class DetailView(generic.DetailView):
...
def get_queryset(self):
"""
Excludes any questions that aren't published yet.
"""
return Question.objects.filter(pub_date__lte=timezone.now())
Settings.py
import os
from pathlib import Path
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/dev/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-&6_7o3ob-kr=@!hoyu&-&8t8+t7r5_-9ejnz4lrehwvwd5=i+a'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'polls.apps.PollsConfig',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
MIDDLEWARE = [
'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',
]
ROOT_URLCONF = 'mysite.urls'
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',
],
},
},
]
WSGI_APPLICATION = 'mysite.wsgi.application'
# Database
# https://docs.djangoproject.com/en/dev/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}
# Password validation
# https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/dev/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Europe/Moscow'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/dev/howto/static-files/
STATIC_URL = '/static/'
# Default primary key field type
# https://docs.djangoproject.com/en/dev/ref/settings/#default-auto-field
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
#TEMPLATE_DIR = os.path.join(BASE_DIR,'templates')
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',
],
},
},
]
Urls.py
from django.contrib import admin
from django.urls import path
urlpatterns = [
path('admin/', admin.site.urls),
]
from django.contrib import admin
from django.urls import include, path
urlpatterns = [
path('polls/', include('polls.urls')),
path('admin/', admin.site.urls),
]
Update
<a href="https://i.stack.imgur.com/V2Jis.png" rel
