phd-site/mainsite/views.py

from django.contrib.messages.views import SuccessMessageMixin
from django.urls import reverse_lazy
from django.views.generic.edit import CreateView

from .models import Presence


class HomeView(SuccessMessageMixin, CreateView):
    """Home page"""

    template_name = "phd/home.html"
    model = Presence
    fields = ["name"]
    success_url = reverse_lazy("home")
    success_message = "Super, merci d'avoir prévenu !"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["has_replied"] = self.request.session.get("presence_has_replied", False)
        return context

    def form_valid(self, form):
        self.request.session["presence_has_replied"] = True
        return super().form_valid(form)