How to make a correct redirection in django app after user delete his message in website?-CodePudding

I am developing a website watching a video course and sometimes I don't agree with mentor decisions about solving some tasks. And while i am trying to figure this out, the problem has already taken really much time and i haven't still found how to solve this.

At first I show the necessary source code.

urls.py and the the error url:

    path('delete-message/<str:pk>/', views.delete_message, name='delete-message')

views.py and function where error happens:

@login_required
def delete_message(request, pk):
    message = Message.objects.get(id=pk)
    room_id = message.room.id

    if request.method == 'POST':
        message.delete()
        return redirect(f'room/{room_id}') ### WHAT DO I HAVE TO DO ???

    return render(request, 'delete-message.html')

delete-message.html and error form:

<form method="POST">
    {% csrf_token %}
    <h2>
        <p>Are you sure you want to delete this message ?</p>
    </h2>
    <a href="{{request.META.HTTP_REFERER}}">Go Back</a>
    <input type="submit" value="Confirm">
</form>

After redirect() works it sends me to the unexisted url: 127.0.0.1:8000/delete-message/10/room/5but it had to be http://127.0.0.1:8000/room/5... Why is it not as such result as I've expected?

Also I've tried to do this:

In the views.py I change function where except of redirect I transfer room_id to the template:

@login_required
def delete_message(request, pk):
    message = Message.objects.get(id=pk)
    room_id = message.room.id

    if request.method == 'POST':
        message.delete()

    return render(request, 'delete-message.html', {'id': room_id})

In the template delete-message.html I try to redirect back to the room by the "action" attribute:

    <form method="POST" action="{% url 'room' id %}">

And this method also return an error:

IntegrityError at /room/5/
NOT NULL constraint failed: BaseApp_message.body

CodePudding user response：

You can use reverse with url name space init like below :-

urls.py

path('room/<str:pk>/', views.room_message, name='room')

Then in your view will be :-

@login_required
def delete_message(request, pk):
    message = Message.objects.get(id=pk)
    room_id = message.room.id

    if request.method == 'POST':
        message.delete()
        url = reverse('room', kwargs={'id': room_id})
        return HttpResponseRedirect(url)

CodePudding user response：

To redirect to a root-relative URL, add a leading forward slash:

# return redirect(f'room/{room_id}')
return redirect(f'/room/{room_id}')