Django 2.0.5出现404页面未找到错误，请求技术支援

Hey there! Let's troubleshoot that 404 error you're facing. Looking at your URL setup, there are a couple of straightforward fixes to get your page working:

1. Add a Trailing Slash to Your Webapp Route in mysite/urls.py #

Django’s path() uses exact URL matching by default. Right now your main URL config has:

path('webapp', include("webapp.urls")),

This means it will only match http://localhost:8000/webapp (without a trailing slash), but most users (and Django’s default redirect behavior) will expect to use http://localhost:8000/webapp/. Update it to include the trailing slash:

path('webapp/', include("webapp.urls")),

This way, Django will automatically handle both versions (with/without the slash) and route correctly to your webapp’s URLs.

2. Either Configure the Root URL or Access the Correct Path #

Right now, your main urlpatterns only includes the admin route and the webapp route. If you’re trying to access http://localhost:8000/ (the root URL), there’s no route defined for it—hence the 404. You have two options here:

• Option 1: Point the root URL to your webapp’s index
  Add this line to mysite/urls.py to make the root path load your webapp’s index view:

  path('', include("webapp.urls")),
  

• Option 2: Visit the correct webapp URL
  Instead of the root, navigate directly to http://localhost:8000/webapp/ (after fixing the trailing slash in step 1).

3. Double-Check Your views.py #

Make sure your webapp/views.py has a properly defined index function. For testing, you can start with a simple response to rule out template issues:

from django.http import HttpResponse

def index(request):
    return HttpResponse("Success! Your webapp is working.")

If you plan to use a template later, ensure you have a templates/webapp/index.html file in your webapp directory (and that Django’s template loader is configured correctly, which it should be by default if you added webapp to INSTALLED_APPS).

After making these changes, restart your runserver and test the URLs again—you should no longer see the 404 error!

内容的提问来源于stack exchange，提问作者Mahir Islam