django display message after POST form submit

Question

I have a page with a POST form, that have a action set to some url.
i.e assume this page url is /form_url/ : ..

The view in /sub

Answer 1

You don't need to do a redirect to clear the form data. All you need to do is re-instantiate the form:

def your_view(request):
    form = YourForm(request.POST or None)
    success = False
    if request.method == 'POST':
        if form.is_valid():
            form.save()
            form = YourForm()
            success = True
    return render(request, 'your_template.html', {'form': form})

If the user refreshes the page, they're going to initiate a GET request, and success will be False. Either way, the form will be unbound on a GET, or on a successful POST.

If you leverage the messages framework, you'll still need to add a conditional in the template to display the messages if they exist or not.