Login Required

Part of the Users and Accounts section of Coddy's Django journey. Lesson 6 of 16.

Anyone can open /new/ and write a note, signed in or not. Hiding the New note link would not help: a visitor can type the address. The view itself has to refuse them.

A decorator is a line starting with @ above a function that wraps it in extra code. @login_required checks request.user before the view runs. A shop protects its checkout:

from django.contrib.auth.decorators import login_required


@login_required
def checkout(request):
    ...

A signed in user gets the page. A visitor is redirected to the login page with the page they wanted in the address, /accounts/login/?next=/checkout/, and after logging in LoginView sends them back there. The login page's address is the setting LOGIN_URL, by default /accounts/login/, where yours already is.

Challenge

Easy

Only signed in users can write, edit or delete a note.
The list and a note's page stay open to everyone.

Press Run and open /new/ while logged out. Log in as ada (password coddy-pass-123): you land back on /new/.

Try it yourself

from django.contrib.auth import login
from django.contrib.auth.forms import UserCreationForm
from django.shortcuts import get_object_or_404, redirect, render

from .forms import NoteForm
from .models import Note


def note_list(request):
    notes = Note.objects.all()
    return render(request, "notes/note_list.html", {"notes": notes})


def note_detail(request, pk):
    note = get_object_or_404(Note, pk=pk)
    return render(request, "notes/note_detail.html", {"note": note})


def note_create(request):
    if request.method == "POST":
        form = NoteForm(request.POST)
        if form.is_valid():
            note = form.save()
            return redirect("notes:detail", pk=note.pk)
    else:
        form = NoteForm()
    return render(request, "notes/note_form.html", {"form": form})


def note_edit(request, pk):
    note = get_object_or_404(Note, pk=pk)
    if request.method == "POST":
        form = NoteForm(request.POST, instance=note)
        if form.is_valid():
            form.save()
            return redirect("notes:detail", pk=note.pk)
    else:
        form = NoteForm(instance=note)
    return render(request, "notes/note_form.html", {"form": form, "note": note})


def note_delete(request, pk):
    note = get_object_or_404(Note, pk=pk)
    if request.method == "POST":
        note.delete()
        return redirect("notes:list")
    return render(request, "notes/note_confirm_delete.html", {"note": note})


def signup(request):
    if request.method == "POST":
        form = UserCreationForm(request.POST)
        if form.is_valid():
            user = form.save()
            login(request, user)
            return redirect("notes:list")
    else:
        form = UserCreationForm()
    return render(request, "notes/signup.html", {"form": form})