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[1.6.x] Fixed #21137 -- Documented best practice for URLconfs with re…

…peated pattern prefixes.

Backport of 222460a from master
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commit bb8a08794941ebc4fa5b575bf5dadad92d637dbe 1 parent e76dd4c
Michael DiBernardo MichaelDiBernardo authored timgraham committed
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  1. +26 −0 docs/topics/http/urls.txt
26 docs/topics/http/urls.txt
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@@ -365,6 +365,32 @@ instead. For example, consider this URLconf::
In this example, the ``/credit/reports/`` URL will be handled by the
``credit.views.report()`` Django view.
+This can be used to remove redundancy from URLconfs where a single pattern
+prefix is used repeatedly. For example, consider this URLconf::
+
+ from django.conf.urls import patterns, url
+
+ urlpatterns = patterns('wiki.views',
+ url(r'^(?P<page_slug>\w+)-(?P<page_id>\w+)/history/$', 'history'),
+ url(r'^(?P<page_slug>\w+)-(?P<page_id>\w+)/edit/$', 'edit'),
+ url(r'^(?P<page_slug>\w+)-(?P<page_id>\w+)/discuss/$', 'discuss'),
+ url(r'^(?P<page_slug>\w+)-(?P<page_id>\w+)/permissions/$', 'permissions'),
+ )
+
+We can improve this by stating the common path prefix only once and grouping
+the suffixes that differ::
+
+ from django.conf.urls import include, patterns, url
+
+ urlpatterns = patterns('wiki.views',
+ url(r'^(?P<page_slug>\w+)-(?P<page_id>\w+)/', include(patterns('',
+ url(r'^history/$', 'history'),
+ url(r'^edit/$', 'edit'),
+ url(r'^discuss/$', 'discuss'),
+ url(r'^permissions/$', 'permissions'),
+ ))),
+ )
+
.. _`Django Web site`: https://www.djangoproject.com/
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