how do I update/delete a content in Django?

user_10353952 0
Viewed 966

So I have a form in Django that lets users write their diary.
Now I want to add edit button and delete button, but I'm having error. So here are the codes.
template (detail.html) 

...
<form method='post' class="form-group">
    {% csrf_token %}
    <div class="row justify-content-center">
        <a href="{% url 'delete' authuser_id slug %}">
            <button class='btn btn-primary button-delete'>Delete</button>
        </a>
    </div>
</form>

urls.py

...
urlpatterns = [
...
    path('detail/<int:authuser_id>/<slug:slug>', views.detail, name='detail'),
    path('detail/<int:authuser_id>/<slug:slug>', views.delete, name='delete'),
]

views.py

from .models import DiaryInput
...

def detail(request, authuser_id, slug):
    todayDiary = DiaryInput.objects.get(slug=slug)
    return render(request, '/detail.html', {'todayDiary' : todayDiary})

def delete(request, authuser_id, slug):
    todayDiary = DiaryInput.objects.get(slug=slug)
    todayDiary.delete()
    return redirect('/')

When I go to the detail page of a specific diary, I get an error that says :

Reverse for 'delete' with arguments '('',)' not found. 1 pattern(s) tried: ['detail/detail/(?P[0-9]+)/(?P[-a-zA-Z0-9_]+)/delete$']

I believe there is something wrong with my template, in the {% url %} tag, but I don't see what I've done wrong. I appreciate your help :)

crud django
2 Answers
views.py

def add(request):
    if request.method == 'POST':
        form = EditEntryForm(data=request.POST)
        if form.is_valid():
            form.save()
            return redirect('home')             
    else:
        form = AddEntryForm()
    return render(request, '/add.html', {'form':form})

def update(request, id):
    entry = get_object_or_404(Entry, id=id)
    if request.method == 'POST':
        form = EditEntryForm(data=request.POST, instance=entry)
        if form.is_valid():
            form.save()
            return redirect('home')             
    else:
        form = EditEntryForm(instance=entry)
    return render(request, '/edit.html', {'form':form})

def delete(request, id, slug):
    Entry.objects.filter(id=id, slug=slug).delete()
    return redirect('home')

urls.py

path('add_entry/', views.add, name='add'),
path('update/<int:id>/', views.update, name='update'),    
path('delete/<int:id>/<slug:slug>/', views.delete, name='delete'),


<a href="{% url 'detail' todayDiary.authuser_id todayDiary.slug %}">{{ entry.title }}</a>
<a href="{% url 'update' todayDiary.authuser_id %}">Update</a>
<a href="{% url 'delete' todayDiary.authuser_id todayDiary.slug %}">Delete</a>

and render form in templates as {{ form.as_p }} and it's good idea to seprate path for detail and delete don't mix it. Hope this helps.

user_115370660

You have specified the same path for both the urls detail and delete so change there :

 path('detail/<int:authuser_id>/<slug:slug>', views.detail, name='detail'),
 path('delete/<int:authuser_id>/<slug:slug>', views.delete, name='delete'),

And now in the template 

 <a href="{% url 'delete' todayDiary.id todayDiary.slug %}">
user_120616530
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