我的Django项目urls.py文件为何致网站崩溃？（《Python Crash Course》第18章）

Hey there! Let's break down why your Django site is crashing when you add that include('learning_logs.urls') line, and how to fix it. Here are the most likely culprits to check:

1. Fix the syntax error in your imports first #

Look at the first line of your crashing code:

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

You’ve crammed two from statements into a single line—Python can’t parse this correctly, which will immediately throw an error and crash your site. Split them into separate lines like this:

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

This is probably the quickest fix if you haven’t noticed this typo yet.

2. Check if learning_logs is registered in settings.py #

Django won’t recognize your app’s URLs unless you’ve added it to the INSTALLED_APPS list in your project’s settings.py. Open that file and make sure you have this entry in the list:

INSTALLED_APPS = [
    # ... other default apps like 'django.contrib.admin'
    'learning_logs',
]

If it’s missing, add it and restart your development server.

3. Verify learning_logs/urls.py exists and is properly formatted #

The include() function relies on a valid URL configuration file in your learning_logs app. Double-check:

• There’s a urls.py file inside your learning_logs app folder (same level as models.py and views.py).
• The file has a valid urlpatterns list with no syntax errors. A basic working version looks like this:

  from django.urls import path
  from . import views
  
  urlpatterns = [
      # Example route for your app's homepage
      path('', views.index, name='index'),
  ]
  

Missing files, typos (like missing commas or incorrect indentation), or missing imports here will cause the include() call to fail.

After checking these points, restart your Django server and test again. One of these issues is almost certainly the root cause of your crash!

内容的提问来源于stack exchange，提问作者orbit6781