(Django) Reverse dynamic urls with multiple arguments using Django Views

Question

I am trying to pass two arguments to make a dynamic URL for each post of a blog app I'm working on. I get it to work if I pass the id, but don't know what's the syntax when using +1 arguments (nor if I'm doing things right).

I want to make urls be 'post/<int:pk>/<slug:slug>/' but can only make it work with the id: 'post/<int:pk>/

Here's how I have it now:

URLS.PY

    urlpatterns = [
    ...
    path('post/<int:pk>/<slug:slug>/', PostDetailView.as_view(), name='post-detail'),
    path('post/new/', PostCreateView.as_view(), name='post-create'),
    path('post/<int:pk>/<slug:slug>/update/', PostUpdateView.as_view(), name='post-update'),
    path('post/<int:pk>/<slug:slug>/delete/', PostDeleteView.as_view(), name='post-delete'),
    ...
    ]

VIEWS.PY

   class PostDetailView(DetailView):
        model = Post

I am calling this in the template:

   <ul class="secondary-menu menu-list">
        <li class="menu-item"><a href="{% url 'post-update' object.slug %}">Edit Post</a></li>
    <li class="red-button"><a href="{% url 'post-delete' object.slug %}">Delete</a></li>
    </ul>

And have this function to retrieve the path to any specific instance in MODELS.py

   def get_absolute_url(self):
        return reverse('post-detail', kwargs={'pk': self.pk, 'slug':slug})

I get the following error during template rendering

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

Exprator · Accepted Answer · 2019-10-15 05:12:14Z

3

    def get_absolute_url(self):
        return reverse('post-detail', kwargs={'pk': self.pk, 'slug':self.slug})

you missed the self in slug, else you need to pass slug as a parameter to the function if self is not needed.

answered Oct 15, 2019 at 5:12

Exprator

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1 Comment

Franco D'Angelo Over a year ago

I made the change, but still get the same error. May it be something about how I'm passing the url in the template? Because when I use only the id and call the url as <a href="{% url 'post-update' object.id %}">Edit Post</a> it works. But when I add the second argument (slug), it breaks <a href="{% url 'post-update' object.id object.slug %}">Edit Post</a>

Mohammed Aadil · Accepted Answer · 2019-10-15 05:43:11Z

0

You need to pass slug as self.slug and also if slug is empty or null your reverse url will not work.

get_absolute_url(self):
        return reverse('post-detail', kwargs={'pk': self.pk, 'slug':self.slug})

answered Oct 15, 2019 at 5:43

Mohammed Aadil

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Franco D'Angelo · Accepted Answer · 2019-10-16 03:34:53Z

0

I found the error.

The settings for the files URLS.PY, VIEWS.PY were ok.

As both @Exprator and @Mohammed Aadil mentioned, I was missing the self in slug in the MODELS.PY file.

But I kept having the same error because I didn't update the urls from all the html templates. By the way, if you're not sure about the syntax on passing multiple arguments to a url, here's how it worked for me: {% url 'post-detail' post.id post.slug %}

answered Oct 16, 2019 at 3:34

Franco D'Angelo

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