Django 4.2 Compatibility

[usman19953]

After updating to Django 4.0 or later, I encountered an AttributeError in the DatatablesServerSideView due to the removal of the request.is_ajax() method from Django. The specific error message is as follows:

AttributeError: 'WSGIRequest' object has no attribute 'is_ajax'

This issue arises when attempting to perform AJAX requests, as request.is_ajax() was used to detect such requests.

Steps to Reproduce:

1. Use Django 4.0 or later where request.is_ajax() has been removed.
2. Perform an AJAX request that triggers the DatatablesServerSideView.

Expected Behavior:

The view should correctly identify AJAX requests without resulting in an AttributeError.

Actual Behavior:

An AttributeError is thrown due to the use of the deprecated request.is_ajax() method, indicating that this method is no longer available in Django 4.0+.

Suggested Fix:

Replace the use of request.is_ajax() with a custom check for the X-Requested-With HTTP header to detect AJAX requests. For example:

def is_ajax(request):
    return request.headers.get('X-Requested-With') == 'XMLHttpRequest'

And then, use this is_ajax(request) function instead of request.is_ajax() within the DatatablesServerSideView.

I believe addressing this issue will enhance compatibility with current and future versions of Django, ensuring the continued usability of this valuable view.