[Django]-Django display message after POST form submit

The django admin uses django.contrib.messages, you use it like this:

In your view:

from django.contrib import messages

def my_view(request):
    ...
       if form.is_valid():
          ....
          messages.success(request, 'Form submission successful')

And in your templates:

{% if messages %}
<ul class="messages">
    {% for message in messages %}
    <li  {% if message.tags %} class=" {{ message.tags }} " {% endif %}> {{ message }} </li>
    {% endfor %}
</ul>
{% endif %}

For Class Based Views use self.request

I also use self.request.path_info in my return

from django.contrib import messages

class MyCreateView(CreateView):
    ...
       def form_valid(self, form):
          ....
          self.object.save()

          messages.success(self.request, 'Form submission successful')
          
          return HttpResponseRedirect(self.request.path_info)

Same template as damio’s answer:

{% if messages %}
<ul class="messages">
    {% for message in messages %}
    <li  {% if message.tags %} class=" {{ message.tags }} " {% endif %}> {{ message }} </li>
    {% endfor %}
</ul>
{% endif %}

from django.contrib.messages.views import SuccessMessageMixin
from django.views.generic.edit import CreateView 
from myapp.models import Author

class AuthorCreate(SuccessMessageMixin, CreateView):
    model = Author
    success_url = '/success/'
    success_message = "%(name)s was created successfully"

https://docs.djangoproject.com/en/1.11/ref/contrib/messages/

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.

Django messages framework stores the messages in the session or cookie (it depends on the storage backend).

If you’re using a classed based view with django forms, and granted you’ve got the messages.html template set up, you can simply pass the ‘SuccessMessageMixin’ into your view like below

class YourView(SuccessMessageMixin,View):
        success_message = 'your message_here'

This will display your message upon form success