Скачать или смотреть Resolving the PUT Method Issue with Fetch API in Django

Discover how to fix the `PUT 403 (Forbidden)` error in your Django project and correctly update your likes count with the Fetch API method using clear, actionable steps.
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Resolving the PUT Method Issue with Fetch API in Django: A Step-by-Step Guide

If you're working with a Django project and utilizing the Fetch API to update your database, you may have encountered a frustrating issue where the PUT method fails to update your database and results in a PUT 403 (Forbidden) error. This is a common problem, especially when dealing with user authentication and CSRF protection in Django. In this guide, we'll take a closer look at the problem you've encountered and walk you through the solution step-by-step.

The Problem

You have a webpage displaying posts and a like/dislike button for each post. While the like count seems to update on the client side (in the browser), refreshing the page resets all values, indicating that no actual updates are being made to the database.

Specific Issues You Encountered:

Error Message: PUT 403 (Forbidden)

No database updates: The likes count is not persisting after a refresh.

Let’s break down how to resolve this issue effectively.

The Solution

The main problem lies in your Django view handling the PUT request. After troubleshooting, it was determined that the CSRF protection mechanism in Django was causing the 403 Forbidden error. Below, we will explore how to fix this issue by making adjustments in both your views.py and frontend JavaScript code.

Step 1: Update the Django View

Import csrf_exempt Decorator: First, ensure that you have imported the necessary decorator to bypass CSRF validation for this specific view.

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

Add @ csrf_exempt Decorator: Next, simply add the @ csrf_exempt decorator above your view function. Here's what the updated view function looks like:

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

Step 2: Adjust Your Fetch API Call

Change the HTTP Method to PATCH: Since you are only updating a minor value (the likes), it is more appropriate to use the PATCH method instead of PUT. Update your Fetch API call in your JavaScript code as follows:

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

Additional Considerations

User Authentication: Make sure users are authenticated before they can like posts by keeping the @ login_required decorator.

Error Handling: Always check and handle errors in your Fetch API calls to provide a smooth user experience.

Conclusion

By adding the @ csrf_exempt decorator to your view and changing your HTTP method from PUT to PATCH, you can now successfully update the likes count in your Django application without running into the 403 Forbidden error. This simple fix allows you to keep improving your application and enhance user interaction seamlessly.

Recap of Key Steps:

Import and use @ csrf_exempt in your view function.

Change from PUT to PATCH in your Fetch API call for minor updates.

Take these steps into consideration and you should see the likes persist even after refreshing the page. If you have any further questions or need more assistance, feel free to ask in the comments below!