Cannot get polls to show in url-CodePudding

I am following the django tutorials and so far whilst on task 3, I cannot get the polls to show on the url.

If I have followed the instructions properly and carefully, it should look like this:

models.py:

from django.db import models

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

views.py

from django.http import HttpResponse
from .models import Question

def index(request):
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    output = ', '.join([q.question_text for q in latest_question_list])
    return HttpResponse(output)

def detail(request, question_id):
    return HttpResponse("You're looking at question %s." % question_id)

def results(request, question_id):
    response = "You're looking at the results of question %s."
    return HttpResponse(response % question_id)

def vote(request, question_id):
    return HttpResponse("You're voting on question %s." % question_id)

urls.py:

from django.contrib import admin
from django.urls import include, path
from . import views
urlpatterns = [
    path('polls/', include('polls.urls')),
    path('admin/', admin.site.urls),
    # ex: /polls/
    path('', views.index, name='index'),
    # ex: /polls/5/
    path('<int:question_id>/', views.detail, name='detail'),
    # ex: /polls/5/results/
    path('<int:question_id>/results/', views.results, name='results'),
    # ex: /polls/5/vote/
    path('<int:question_id>/vote/', views.vote, name='vote'),
]

index.html

{% if latest_question_list %}
    <ul>
    {% for question in latest_question_list %}
        <li><a href="/polls/{{ question.id }}/">{{ question.question_text }}</a></li>
    {% endfor %}
    </ul>
{% else %}
    <p>No polls are available.</p>
{% endif %}

settings.py

INSTALLED_APPS = [
    'polls.apps.PollsConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

However, when I run the server it cannot find polls

CodePudding user response：

Looking at the image, you can see the message:

Using the URLconf defined in mysite.urls, Django tried these URL patterns, in this order:
    1. admin/

Your project is currently pointing at the urls in the mysite folder, which is the app that contains the settings.py. You can verify this by checking the ROOT_URLCONF in your settings.

Based on the url patterns in your polls.urls, your best option is to move include('polls.urls') in mysite.urls:

polls/urls.py

urlpatterns = [
    path('', views.index, name='index'),
    path('<int:question_id>/', views.detail, name='detail'),
    path('<int:question_id>/results/', views.results, name='results'),
    path('<int:question_id>/vote/', views.vote, name='vote'),
]

mysite/urls.py

urlpatterns = [
    path('polls/', include('polls.urls')),
    path('admin/', admin.site.urls),
]

We're doing this because:

Whenever Django encounters include(), it chops off whatever part of the URL matched up to that point and sends the remaining string to the included URLconf for further processing.

Remember: You shouldn't declare the root path in the same urls.py that is imported on the root path like how you declared path('polls/', include('polls.urls')) in your polls.urls. You're basically importing polls.urls in polls.urls this way.

CodePudding user response：

You are missing the step "Write your first view" from the tutorial

https://docs.djangoproject.com/en/4.0/intro/tutorial01/#write-your-first-view

The next step is to point the root URLconf at the polls.urls module. In mysite/urls.py, add an import for django.urls.include and insert an include() in the urlpatterns list, so you have:

mysite/urls.py

from django.contrib import admin
from django.urls import include, path

urlpatterns = [
    path('polls/', include('polls.urls')),
    path('admin/', admin.site.urls),
]