问题
I am currently trying to complete the Django 2.0 tutorial Poll application. I am using Django version 2.0.7 and Python 3.7.0. I have set up a virtual environment for this project. I am very new to Django so apologies if my terminology is incorrect.
Basically, I cant get part 1 to work.
I have tried numerous times to run it and I cant seem to figure out why it wont work.
Before I create the Polls app the site runs correctly and I get the rocket ship, however after I create the app, update polls/views.py, create the polls/urls.py file and update the mysite/urls.py, I get the following error:
Page not found (404) Request method GET Request URL: http://127.0.0.1:8000/
Using the URLconf defined in mysite.urls, Django tried these URL patterns, in this order:
- polls/
- admin/
The empty path didn't match any of these.
I thought my code was incorrect, so I copied and pasted the code from the website directly and tried to run it. It still wont work.
Below is the code I am trying and the directory layout. Any help would be greatly appreciated. I'm sure I am just missing something simple.
Thank you.
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),
]
polls/urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'), ]
polls/views.py
from django.http import HttpResponse
def index(request):
return HttpResponse("Hello, world. You're at the polls index.")
Directory of C:\Users\ad\Documents\projects\mysite\msenv\mysite\mysite
print.txt
settings.py
urls.py
wsgi.py
init.py
pycache
Directory of C:\Users\ad\Documents\projects\mysite\msenv\mysite\polls
admin.py
apps.py
migrations
models.py
tests.py
urls.py
views.py
init.py
pycache
回答1:
have you added your app name inside settings.py make sure you have added the name in settings.py which resides under project folder
in your case it will be here:
Directory of C:\Users\ad\Documents\projects\mysite\msenv\mysite\mysite
like this:
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'app_name',] # <--- polls in your case
make sure you are using your routes you have defined to access the correct page
for example in your case:
your website's routes are:
from django.contrib import admin
from django.urls import include, path
urlpatterns = [
path('polls/', include('polls.urls')),
path('admin/', admin.site.urls),
]
and your application 'polls' routes are:
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
]
according to your views.py file
which is this:
from django.http import HttpResponse
def index(request):
return HttpResponse("Hello, world. You're at the polls index.")
you must visit http://localhost:{port number}/polls/ or http://127.0.0.1:{port number}/polls/
default port number is 8000
after running server using python manage.py runserver
to get your page as an output on browser
来源：https://stackoverflow.com/questions/51347587/why-is-django-giving-me-a-404-error