Remove a Guest

Part of the Forms section of Coddy's Django journey. Lesson 20 of 20.

The organiser needs to take people off the guest page. Each row gets its own small form whose action is a URL for that one row, so a button posts about its row only. A to-do list with a Done button per task:

{% for task in tasks %}
<li>
    {{ task.title }}
    <form method="post" action="{% url 'todo:finish' task.pk %}">
        {% csrf_token %}
        <button type="submit">Done</button>
    </form>
</li>
{% endfor %}

A view like finish has no page: it only acts. @require_POST from django.views.decorators.http answers any other method with 405 before the view runs, so a link or a typed address never removes anyone:

@require_POST
def finish(request, pk):

After acting, add a message and redirect, as before.

Challenge

Hard

On the guest page, each guest gets a Remove button that posts to /rsvps/<pk>/remove/ (URL name remove_rsvp).
That view accepts only POST. It deletes the RSVP, adds Ada was removed from the guest list. with the guest's name, and redirects to the event's guest page.

Press Run and remove a guest.

Try it yourself

from django.contrib import messages
from django.shortcuts import get_object_or_404, redirect, render

from .forms import EventForm, RSVPForm
from .models import Event


def event_list(request):
    q = request.GET.get("q", "")
    events = Event.objects.all()
    if q:
        events = events.filter(title__icontains=q)
    return render(request, "events/event_list.html", {"events": events, "q": q})


def event_detail(request, pk):
    event = get_object_or_404(Event, pk=pk)
    if request.method == "POST":
        form = RSVPForm(request.POST, event=event)
        if form.is_valid():
            rsvp = form.save(commit=False)
            rsvp.event = event
            rsvp.save()
            messages.success(request, "You're on the list!")
            return redirect("events:detail", pk=event.pk)
    else:
        form = RSVPForm(event=event)
    return render(request, "events/event_detail.html", {"event": event, "form": form})


def new_event(request):
    if request.method == "POST":
        form = EventForm(request.POST)
        if form.is_valid():
            event = form.save()
            messages.success(request, "Your event was added.")
            return redirect("events:detail", pk=event.pk)
    else:
        form = EventForm()
    return render(request, "events/new_event.html", {"form": form})


def edit_event(request, pk):
    event = get_object_or_404(Event, pk=pk)
    if request.method == "POST":
        form = EventForm(request.POST, instance=event)
        if form.is_valid():
            form.save()
            messages.success(request, "Your changes were saved.")
            return redirect("events:detail", pk=event.pk)
    else:
        form = EventForm(instance=event)
    return render(request, "events/edit_event.html", {"form": form, "event": event})


def delete_event(request, pk):
    event = get_object_or_404(Event, pk=pk)
    if request.method == "POST":
        event.delete()
        messages.success(request, "The event was deleted.")
        return redirect("events:list")
    return render(request, "events/delete_event.html", {"event": event})


def guest_list(request, pk):
    event = get_object_or_404(Event, pk=pk)
    return render(request, "events/guest_list.html", {"event": event})