Re: While going through Django tutorial i commited an error because of which i am not able to execute python manage.py runserver. The exceptions and codes are mentioned below: In exception it is mentioned code error is in index.html line 4

You are missing a closing '>' in your detail url

On Tuesday, May 8, 2018 at 12:42:20 PM UTC-4, Avitab Ayan Sarmah wrote:

polls/urls.py:

from django.urls import path

from . import views

app_name = 'polls'

urlpatterns = [

# ex: /polls/

path('', views.IndexView.as_view(), name='index'),

path('<int:pk/', views.DetailView.as_view(), name='detail'),

path('<int:pk>/results/', views.ResultsView.as_view(), name='results'),

path('<int:question_id>/vote/', views.vote, name='vote'),

]

On Tuesday, May 8, 2018 at 10:09:44 PM UTC+5:30, Julio Biason wrote:

Your problem is your urls.py:

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '(1,)' not found. 1 pattern(s) tried: ['\\<int\\:pk\\/$']

You are looking for a URL named "details" which accepts 1 number and Django does not know it.

On Tue, May 8, 2018 at 1:34 PM, Avitab Ayan Sarmah <avita...@gmail.com> wrote:

Exceptions:

PS C:\Users\AVITABAYAN\mysite> python manage.py runserver

Performing system checks...

System check identified no issues (0 silenced).

May 08, 2018 - 22:00:28

Django version 2.0.1, using settings 'mysite.settings'

Starting development server at http://127.0.0.1:8000/

Quit the server with CTRL-BREAK.

Internal Server Error: /

Traceback (most recent call last):

  File "c:\python36\lib\site-packages\django\core\handlers\exception.py", line 35, in inner

    response = get_response(request)

  File "c:\python36\lib\site-packages\django\core\handlers\base.py", line 158, in _get_response

    response = self.process_exception_by_middleware(e, request)

  File "c:\python36\lib\site-packages\django\core\handlers\base.py", line 156, in _get_response

    response = response.render()

  File "c:\python36\lib\site-packages\django\template\response.py", line 106, in render

    self.content = self.rendered_content

  File "c:\python36\lib\site-packages\django\template\response.py", line 83, in rendered_content

    content = template.render(context, self._request)

  File "c:\python36\lib\site-packages\django\template\backends\django.py", line 61, in render

    return self.template.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 175, in render

    return self._render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 167, in _render

    return self.nodelist.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 943, in render

    bit = node.render_annotated(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 314, in render

    return nodelist.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 943, in render

    bit = node.render_annotated(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 211, in render

    nodelist.append(node.render_annotated(context))

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 447, in render

    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)

  File "c:\python36\lib\site-packages\django\urls\base.py", line 88, in reverse

    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))

  File "c:\python36\lib\site-packages\django\urls\resolvers.py", line 632, in _reverse_with_prefix

    raise NoReverseMatch(msg)

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '(1,)' not found. 1 pattern(s) tried: ['\\<int\\:pk\\/$']

[08/May/2018 22:00:42] "GET / HTTP/1.1" 500 134672

views.py:

from django.shortcuts import get_object_or_404, render

from django.http import HttpResponseRedirect

from django.urls import reverse

from django.views import generic

from . models import Choice, Question

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."""

return Question.objects.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):

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()

#...

#...

#...

return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

index.html:

{% if latest_question_list %}

  <ul>

  {% for question in latest_question_list %}

      <li><a href="{% url 'polls:detail' question.id %}">{{

question.question_text }}</a></li>

  {% endfor %}

  </ul>

{% else %}

  <p>No polls are available.</p>

{% endif %}

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users...@googlegroups.com.
To post to this group, send email to django...@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/1681bb6e-226e-4792-ab5c-1cadcf836eff%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

Julio Biason, Sofware Engineer

AZION  |  Deliver. Accelerate. Protect.

Office: +55 51 3083 8101  |  Mobile: +55 51 99907 0554

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/4047981b-ef18-4cce-9c8f-243bf86e6476%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.