14 Edit existing notes

We have the ability to create new notes, but there is no way currently to edit existing notes.

Make the view and URL

Modify your views

from django.views.generic import ListView, DetailView, CreateView, UpdateView

...

class NoteUpdate(LoginRequiredMixin, UpdateView):
    model = Note
    form_class = NoteForm
    template_name = 'note/form.html'
    success_url = reverse_lazy('note:index')

    def form_valid(self, form):
       form.instance.pub_date = timezone.now()
       return super(NoteUpdate, self).form_valid(form)

And whenever you add a new view you need to make a URL for it:

url(r'^(?P<pk>[0-9]+)/edit/$', NoteUpdate.as_view(), name='update'),

Modify templates

We'll use the same template - note/form.html for both creating and updating view. Update the action button to POST to the appropriate URL based on whether we are creating or updating. If we are updating, object will be defined.

{% if object %}
<form action="{% url 'note:update' object.pk %}" method="post" accept-charset="utf-8">
{% else %}
<form action="{% url 'note:create' %}" method="post" accept-charset="utf-8">
{% endif %}

And in the index, add a link to edit the note in an appropriate place.

<a href="{% url 'note:update' note.id %}">Edit</a>