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Python Django Basics Final Details Article detail view

pawkan kenluecha
pawkan kenluecha
26,303 Points
Posted by pawkan kenluecha
pawkan kenluecha
26,303 Points

asking about Url pattern order.

Today, I did this exercise. And I found something that I don't understand.

This was the working patterns.

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

I tried something like this and it didn't work.

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

Could someone explains me more detail about this ?

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,454 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,454 Points

As you may have learned, the first url pattern that matches the regex will be used. In your second example, the empty string r'' will match anything empty or not. To truly match the empty string, use anchor markers to indicate the entire string must be empty: r'^$'