CODEWITHSUNDEEP
pythondjango
user3050832
user3050832

Reputation: 127

Reverse for viewname with arguments '(1,)' not found

Attempting to start the server and getting following exception (starting server leads to polls/index.html page):

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '(1,)' not found. 1 pattern(s) tried: ['$(?P[0-9]+)']

If I remove the following line fron index.html, the error is removed. But I don't get what the issue is. Even the ide prompts the current data. Found similar questions where the issue was with incorrect number of arguments which isn't the case with this. Please help.

Error line: 

{% url 'polls:detail' q.id %}

index.html

{% for q in latest_question_list %}
    <li><a href="{% url 'polls:detail' q.id %}">{{ q.question_text }}</a></li>
{% endfor %}

urls.py (inside polls app folder)

app_name = 'polls'

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^(?P<question_id>[0-9]+)', views.detail, name='detail'),
]

views.py

def index(request):
    latest_question_list = Question.objects.order_by('pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    return HttpResponse(question_id)

urls.py (main)

urlpatterns = [
    url(r'^$', include('polls.urls')),
    url(r'^admin/', admin.site.urls),
    url(r'^polls/', include('polls.urls'))
]

Upvotes: -1

Views: 357

Answers (1)

iklinac
iklinac

Reputation: 15738

You have included your poll URLs into the regex with stopping character $ (urls.py - main)

url(r'^$', include('polls.urls'))

This way there is no possible fulfilment for the following regex

 ['$(?P[0-9]+)']

If you still want to show polls index as your index site remove $ from line

url(r'^', include('polls.urls'))

Also, you have 2 inclusions of the same namespace and first catch of it is used ( index )

You can even see this if you change namespace for the polls URL

url(r'^polls/', include('polls.urls', namespace='test'))

and use namespaced include as test:details ( this should work but I still recommend you to consolidate where you want to include poll URLs

Upvotes: 3

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