CODEWITHSUNDEEP
pythondjangodjango-urls
user1876508
user1876508

Reputation: 13172

Django nested URLs

How do I nest url calls in django? For example, if I have two models defined as 

class Post(models.Model):
    title = models.CharField(max_length=50)
    body = models.TextField()
    created = models.DateTimeField(auto_now_add=True, editable=False)


    def __unicode__(self):
        return self.title

    @property
    def comments(self):
        return self.comment_set.all()

class Comment(models.Model):
    comment = models.TextField()
    post = models.ForeignKey(Post)
    created = models.DateTimeField(auto_now_add=True)

With the following url files

root url

urlpatterns = patterns('',
    url(r'^post/', include('post.urls')),
)

post url 

urlpatterns = patterns('',
    url(r'^$', views.PostList.as_view()),
    url(r'^(?P<pk>[0-9]+)/$', views.PostDetail.as_view()),
    url(r'^(?P<pk>[0-9]+)/comments/$', include('comment.urls')),
)

comment url

urlpatterns = patterns('',
    url(r'^$', CommentList.as_view()),
    url(r'^(?P<pk>[0-9]+)/$', CommentDetail.as_view()),
)

But when I go to /post/2/comments/1, I am given a Page not found error stating 

Using the URLconf defined in advanced_rest.urls, Django tried these URL patterns, in this order:
^post/ ^$
^post/ ^(?P<pk>[0-9]+)/$
^post/ ^(?P<pk>[0-9]+)/comments/$
The current URL, post/2/comments/1, didn't match any of these.

This is not a problem though when I visit /post/2/comments Is this not allowed by django to have nested URL calls like this?

Upvotes: 6

Views: 9514

Answers (3)

Raisul Islam
Raisul Islam

Reputation: 1581

Above Django 2.0 you can use simply...

urlpatterns = [
    path('<pk>/comments/', include('comment.urls')),
]

Upvotes: 0

Paulo Bu
Paulo Bu

Reputation: 29804

I think is probably because you're finishing the regex with the dollar sign $. Try this line without the dollar sign:

...
url(r'^(?P<pk>[0-9]+)/comments/', include('comment.urls')),
...

Hope it helps!

Upvotes: 13

Simeon Visser
Simeon Visser

Reputation: 122536

You have a $ at the end of r'^(?P<pk>[0-9]+)/comments/$'.

That means Django will only match with that URL when there is nothing after that.

So any longer URLs currently won't be considered. Therefore, you need to update the regular expression to:

url(r'^(?P<pk>[0-9]+)/comments/', include('comment.urls')),

Upvotes: 6

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