How to Fix the 404 Page Not Found Error in Your Django Project

Описание: Resolve the common `404 Page Not Found` error in your Django application by correctly configuring your URL patterns. Learn how to fix it step-by-step!
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This video is based on the question https://stackoverflow.com/q/73665194/ asked by the user 'Hafiz' ( https://stackoverflow.com/u/19959477/ ) and on the answer https://stackoverflow.com/a/73665486/ provided by the user 'NixonSparrow' ( https://stackoverflow.com/u/12775662/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix the 404 Page Not Found Error in Your Django Project

When you're starting with Django, encountering errors is quite common. One such frustration is the dreaded 404 Page Not Found error. This happens often due to misconfigured URL patterns. In this guide, we'll explore a scenario that leads to this error and how to fix it effectively.

The Problem

Imagine you’re following a guide to build a project called smartnotes App. You've set everything up according to the guide, including your settings.py, views.py, and urls.py. However, when you run your Django server, you visit the homepage expecting to see your welcome page but instead are met with a 404 error. Here’s the beginning of your error message:

[[See Video to Reveal this Text or Code Snippet]]

Django didn’t find a match for that URL because it can't find a view associated with the empty route (/). Let’s dive deeper into how you can solve this problem!

Analyzing Your Code

Your Current URL Configuration

You've set up your URL patterns as follows in urls.py:

[[See Video to Reveal this Text or Code Snippet]]

Understanding the Issue

In this configuration, you've mapped the view to the route /home. This means you need to access your application by navigating to http://127.0.0.1:8000/home. However, when you try accessing the site with http://127.0.0.1:8000/, it results in a 404 error since there is no URL registered at that root address (empty path).

The Solution

To fix this issue, you need to change the URL patterns in your urls.py to properly map the home view to the root URL. Here’s what you should do:

Step 1: Update the URL Patterns

Modify your urlpatterns list in urls.py to include an empty string for the root path, like so:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Restart Your Server

After making changes to your urls.py, be sure to restart your Django server to apply the updates. You can do this by running:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Access Your Home Page

Now, go to your web browser and enter http://127.0.0.1:8000/. You should now be greeted by your welcome page instead of the 404 error.

Conclusion

Encountering a 404 Page Not Found error can be confusing, especially for beginners. By simply adjusting the URL patterns in your Django application, you can resolve this issue.

Important Note: When configuring your URLs, the first argument in path() is crucial as it defines how users access the views. For the root view, you must use an empty string ('').

With this understanding, you can confidently build and expand your Django applications. Now go ahead and enjoy building amazing web applications with Django!