How to prevent the deletion of old data when updating only new information?

[rinshankolayil]

How can I make sure the file doesn't get deleted when I'm only updating its information and not the file itself?

form_data = {
    'name': name,
    'category': category,
    'description': '',
    'reference_number': reference,
    'is_active': is_active,
    'expiry_date': expiry_date,
}
form_file = {}
if media_path:  # Check if the file is posted
    form_file['media_path'] = media_path

if file_id:
    file_instance = get_object_or_404(ModelName, id=file_id)
    if not media_path:
        form_file['media_path'] = file_instance.media_path
    form = FormName(
        form_data, form_file, instance=file_instance)
else:
    form = FormName(form_data, form_file)

if form.is_valid():
    file_instance = form.save()

[vinnyrose]

If you update the file field and the string value is different than it was before it will trigger the deletion. Ensure the value from the instance matches the value in the form to avoid the deletion.