Скачать или смотреть How to Post/Delete Data from a Form into Database Using Django

Learn how to efficiently manage form data in Django, including creating, saving, and deleting records from your database with practical examples.
---
This video is based on the question https://stackoverflow.com/q/73377017/ asked by the user 'Ben Miller' ( https://stackoverflow.com/u/19589839/ ) and on the answer https://stackoverflow.com/a/73377394/ 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.

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: How to post/delete data from form into database using Django?

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.
---
How to Post/Delete Data from a Form into Database Using Django

In web development with Django, one common task is managing user input through forms. You may find yourself wanting to post data from a form directly into a database and, in some cases, delete data as well. This guide will guide you through the process of integrating JavaScript with Django to achieve these functionalities effectively.

Understanding the Basic Structure

First, let's visualize an example form in HTML that allows users to input their data. Here's a sample structure:

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

In the form above, users can enter data into Field 1 and Field 2 before clicking the Save link to submit their input.

Setting Up the JavaScript to Handle Events

You need to listen for a click event on the Save link. This is done using JavaScript, as shown in the following snippet:

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

Explanation of the JavaScript Code:

Selecting the Save Button: The JavaScript code selects the Save link using document.querySelector.

Adding an Event Listener: Once the button is clicked, the showSelected function will be triggered.

Redirecting: After handling the form submission (which we’ll discuss shortly), it redirects to the home page.

Creating a Django Endpoint to Handle Data

To post data to the database, Django requires an endpoint. This defines where your JavaScript will send data collected from the form. Here’s how to set it up:

Step 1: Define the URL in urls.py

You need to create a URL that points to a view capable of handling the form submission.

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

Step 2: Create the View in views.py

Next, handle the incoming requests by defining a view in views.py that will save the record to your database.

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

Explanation of the Python Code:

Handling POST Requests: The view checks if the request’s method is POST and then retrieves the data from the submitted form.

Saving Data: It creates an Entry object, assigns input values to its fields, and saves it to the database.

Connecting JavaScript and Django Using Fetch API

To send the POST request from JavaScript, use the fetch API within your event listener:

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

Key Points:

fetch API: Sends an asynchronous POST request to your Django view with form data in JSON format.

CSRF Token: Security is handled using Django's CSRF protection mechanism.

Conclusion

By following the steps outlined above, you can successfully post (and later delete if needed) form data to a database in Django using JavaScript. This approach combines the power of Django's backend capabilities with the interactivity of client-side JavaScript. As you develop more complex applications, consider expanding this foundation by implementing additional features like data validation and error handling to enhance user experience.

You now have the essential knowledge to handle form data using Django and JavaScript effectively. Happy coding!