Как прочитать содержимое request.FILES.get и обойти ошибку 'NoneType' object has no attribute 'read'?

@csrf_exempt
def ajax_menu_choice_imgDef(request):
    if request.method == 'POST':
        base_file_img = request.FILES.get('input_img')
        base_file_img .read()
        return HttpResponse('Готово')

Internal Server Error: /ved/post/ajax!menu_choice_img/
Traceback (most recent call last):
  File "C:\Users\ledo\wwwkaba\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\ledo\wwwkaba\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\ledo\wwwkaba\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\ledo\wwwkaba\lib\site-packages\django\views\decorators\csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:\Users\ledo\Google Диск\bf\ved\views\module\ajax_menu_choice_img.py", line 37, in ajax_menu_choice_imgDef
    base_file_img.read()
AttributeError: 'NoneType' object has no attribute 'read'

        var form_img = new FormData();
        var input_img = document.getElementById('for_ajax_menu_choice_img_hide_input').files[0];
        form_img.append('input_img', input_img);
 
        $.ajax(
            {
            method: 'POST',
            url: "{% url 'ved_ajax_menu_choice_imgDef' %}",
            cache: false,
            processData: false,
            data: JSON.stringify({
                form_img,
            }),
            success: function(data) {
                alert(data);
            },
 
            error: function(jqXHR, status, errorThrown){
                alert('ОШИБКА AJAX запроса: ' + status, jqXHR, errorThrown);
            },
        });

new FormData();

multipart/form-data