Скачать или смотреть Troubleshooting AJAX Not Updating MySQL Data

Having trouble with `AJAX` not updating your MySQL database? Here’s a comprehensive guide to diagnose and solve the common issues encountered during the process.
---
This video is based on the question https://stackoverflow.com/q/64301991/ asked by the user 'Code With Bishal' ( https://stackoverflow.com/u/14187575/ ) and on the answer https://stackoverflow.com/a/64302247/ provided by the user 'Moti Salamon' ( https://stackoverflow.com/u/11330713/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: AJAX not updating MySql data

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting AJAX Not Updating MySQL Data: A Step-by-Step Guide

Working with AJAX to update MySQL data can sometimes lead to frustrating issues, especially for developers who are new to the process. One common problem is when your AJAX requests are sent, but the intended data isn't updated in the database. This guide will help you diagnose and resolve this issue effectively.

Overview of the Problem

Imagine you have a PHP script that is designed to update the status of users in your MySQL database. However, despite sending the AJAX requests, the queries fail to execute correctly, and the intended changes aren't reflected in the database.

Here’s an example of the initial PHP script you may be working with:

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

You also have your AJAX code setup that is supposed to send a POST request to this script:

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

However, despite these setups, the query seems to not function as expected.

Steps to Resolve the Issue

1. Identify the Correct Action in AJAX

Starting with your AJAX code, ensure that you are sending the correct action when you make a request. Depending on whether you're updating or deleting a user, the corresponding action must be clearly defined.

If you intend to delete a student, your AJAX request should look like this:

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

Conversely, if you're updating a student, you need a different action like update_student.

2. Ensuring Proper Data Transmission

Make sure that the student_id you are sending is defined and holds the correct value that matches an existing id in your users table. This is essential for the DELETE or UPDATE operations to function properly.

3. Handling the PHP Side Appropriately

On the PHP side, ensure that you are capturing the incoming POST data correctly. Check if the delete_student key actually exists in your $_POST array and respond accordingly. Your PHP could look something like this:

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

4. Testing and Validation

To validate whether your AJAX request is functioning:

Console Log Responses: Modify your AJAX success function to log the response to your browser’s console. This can help you verify whether the server is returning the expected results.

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

Database Checks: Manually check your database to see if the data is being updated or deleted as intended after each request.

Conclusion

With these steps, you can troubleshoot and fix errors relating to AJAX not updating your MySQL database. Troubleshooting involves ensuring that the correct data is sent through AJAX, the PHP correctly processes this data, and appropriate feedback is provided. By following these structured actions, you can ensure smoother interactions between your client-side code and the server.

Remember, accurate communication between the frontend and backend is key to successfully updating your database!