Converted internal link generation in the admin and admin document generator to use named URLs.

Thanks to Florian Apolloner for both the initial patch and his final push to get
this fixed, to Dario Ocles for his great work on the admin templates and
switching the admin_doc application to also use named URLs, to Mikko Hellsing
for his comments and to Jannis and Julien for their review and design guidance.

Fixes #15294.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16857 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/admin_custom_urls/models.py

@@ -0,0 +1,50 @@
+from functools import update_wrapper
+
+from django.contrib import admin
+from django.db import models
+
+
+class Action(models.Model):
+    name = models.CharField(max_length=50, primary_key=True)
+    description = models.CharField(max_length=70)
+
+    def __unicode__(self):
+        return self.name
+
+
+class ActionAdmin(admin.ModelAdmin):
+    """
+    A ModelAdmin for the Action model that changes the URL of the add_view
+    to '<app name>/<model name>/!add/'
+    The Action model has a CharField PK.
+    """
+
+    list_display = ('name', 'description')
+
+    def remove_url(self, name):
+        """
+        Remove all entries named 'name' from the ModelAdmin instance URL
+        patterns list
+        """
+        return filter(lambda e: e.name != name, super(ActionAdmin, self).get_urls())
+
+    def get_urls(self):
+        # Add the URL of our custom 'add_view' view to the front of the URLs
+        # list.  Remove the existing one(s) first
+        from django.conf.urls.defaults import patterns, url
+
+        def wrap(view):
+            def wrapper(*args, **kwargs):
+                return self.admin_site.admin_view(view)(*args, **kwargs)
+            return update_wrapper(wrapper, view)
+
+        info = self.model._meta.app_label, self.model._meta.module_name
+
+        view_name = '%s_%s_add' % info
+
+        return patterns('',
+            url(r'^!add/$', wrap(self.add_view), name=view_name),
+        ) + self.remove_url(view_name)
+
+
+admin.site.register(Action, ActionAdmin)