Django: Generic detail view must be called with either an object pk or a slug

Question

Getting this error when submitting the form associated with this view. Not sure what exactly is the problem, considering I have a form with a very similar structure and it works

Answer 1

Like Robin said, you can use pk_url_kwarg if you want custom pk name.

But as addition, issue Generic detail view must be called with either an object pk or a slug raises also in slug.

So if you want to create custom slug field (no need to use pk or slug name). You can override slug_field and slug_url_kwarg in your DetailView class.

Here is just another example if you want url as Slug Field.

models.py

class Post(models.Model):
    title = models.CharField(max_length=255)
    url = models.SlugField()
    body = models.TextField()
    image = models.ImageField(upload_to='blog/', blank=True, null=True)

views.py

class ListPost(ListView):
    model = Post
    template_name = 'blog/list.html'
    paginate_by = 2
    context_object_name = 'posts'

class DetailPost(DetailView):
    model = Post
    template_name = 'blog/detail.html'
    slug_field = 'url'
    slug_url_kwarg = 'url'

urls.py

urlpatterns = [
    path('', ListPost.as_view()),
    path('/', DetailPost.as_view()),
]