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Python Django Basics Final Details Article detail view

Daniel Goodkin
PLUS
Daniel Goodkin
Courses Plus Student 9,846 Points
Posted by Daniel Goodkin
Daniel Goodkin
Courses Plus Student 9,846 Points

I am doing the article detail view challenge. What's wrong with: url(r'article/(?P<pk>\d+)/$', views.article_view)

The above url does not work and I cannot see why

articles/views.py 
from django.shortcuts import render

from .models import Article, Writer


def article_list(request):
    articles = Article.objects.all()
    return render(request, 'articles/article_list.html', {'articles': articles})


def writer_detail(request, pk):
    writer = Writer.objects.get(pk=pk)
    return render(request, 'articles/writer_detail.html', {'writer': writer})

def article_detail(request, pk):
    article = Article.objects.get(pk=pk)
    return render(request, 'articles/article_detail.html', { 'article': article} )
articles/urls.py 
from django.conf.urls import url

from . import views

urlpatterns = [
    url(r'writer/(?P<pk>\d+)/$', views.writer_detail),
    url(r'', views.article_list),
    url(r'article/(?P<pk>\d+)/$', views.article_detail)
]

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

The last URL has no constraints and will match anything. So your URL must come before the article_list url.:

urlpatterns = [
    url(r'article/(?P<pk>\d+)/$', views.article_detail),
    url(r'writer/(?P<pk>\d+)/$', views.writer_detail),
    url(r'', views.article_list),
]

Kenneth Love: should the last url pattern be url(r'^$', views.article_list)?

Daniel Goodkin
Daniel Goodkin
Courses Plus Student 9,846 Points
Daniel Goodkin
Daniel Goodkin
Courses Plus Student 9,846 Points

Many thanks Chris. I remember now that Kenneth did flag that in the associated video.

Kenneth Love
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

You want the URLs to become more permissive as they go. Ironically, ^$ is very restrictive (it only matches a completely empty string). Still, though, that's generally what you want at the end of your list.

Andreas cormack
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Andreas cormack
Python Web Development Techdegree Graduate 33,011 Points
Andreas cormack
.a{fill-rule:evenodd;}techdegree seal-36
Andreas cormack
Python Web Development Techdegree Graduate 33,011 Points

This worked too

urlpatterns = [
    url(r'writer/(?P<pk>\d+)/$', views.writer_detail),
    url(r'article/(?P<pk>\d+)/$', views.article_detail),
    url(r'', views.article_list), # possible leaving it blank would be the same as  url(r'^$', views.article_list),
]