Django：使用slug而不是pk访问通用UpdateView

Question

The code for using the pk is the following:

views.py

class CreatorUpdate(LoginRequiredMixin, UpdateView):
    model = Creator
    fields = ['first_name', 'last_name', 'location', 'country']
    success_url = reverse_lazy('index')

    # these two methods only give access to the users own profile but not the others (prevents url hacking)
    def user_passes_test(self, request):
        if request.user.is_authenticated:
            self.object = self.get_object()
            return self.object.user == request.user
        return False

    def dispatch(self, request, *args, **kwargs):
        if not self.user_passes_test(request):
            return redirect_to_login(request.get_full_path())
        return super(CreatorUpdate, self).dispatch(request, *args, **kwargs)

urls.py

path('creator/<int:pk>/update/', views.CreatorUpdate.as_view(), name='creator-update')

HTML snippet to call the URL:

<a href="{% url 'creator-update' user.pk %}">{{ user.get_username }}</a>

Now I would like to use a slug (username) instead of the pk to access the UpdateView. I can successfully pass the username to the URL:

<a href="{% url 'creator-update' user.get_username %}">{{ user.get_username }}</a>

but seem not to be able to match it in urls.py

path('creator/<slug:slug>/update/', views.CreatorUpdate.as_view(), name='creator-update')

with the same logic. I also tried to set a SlugField in my Creator model like this:

from django.template.defaultfilters import slugify
class Creator(models.Model):
    ...
    username = models.CharField(max_length=100)
    slug = models.SlugField()

    def save(self, *args, **kwargs):
        self.slug = slugify(self.username)
        super(Creator, self).save(*args, **kwargs)

    ...

And setting slug_field = 'slug' in the UpdateView also does not get it.

These modification result in a 404 error: raised by catalog.views.CreatorUpdate: No creator found matching the query

When adjusting the HTML part to <a href="{% url 'creator-update' user.creator.slug %}">{{ user.get_username }}</a> I get a NoReverseMatch error Reverse for 'creator-update' with arguments '('',)' not found .

What is the logic to use a slug to access a view?

Answer 1

The error is that the user object has no attribute slug. The Creator model has the slug field. Create a ListView of Creator Model then check if each creator object has a slug.

Answer 2

Correct models.py :

class Creator(models.Model):
    ...
    slug = models.SlugField()

    def save(self, *args, **kwargs):
        
        super(Creator, self).save(*args, **kwargs)