Fixed django#19044 -- Made DeletionMixin interpolate its success_url.

Thanks to nxvl and slurms for the initial patch, ptone for the review and timo for the documentation tweaks.

Author: charettes

django/views/generic/edit.py

@@ -242,16 +242,17 @@ def delete(self, request, *args, **kwargs):
  redirects to the success URL.
  """
  self.object = self.get_object()
+ success_url = self.get_success_url()
  self.object.delete()
- return HttpResponseRedirect(self.get_success_url())
+ return HttpResponseRedirect(success_url)
 
  # Add support for browsers which only accept GET and POST for now.
  def post(self, *args, **kwargs):
  return self.delete(*args, **kwargs)
 
  def get_success_url(self):
  if self.success_url:
- return self.success_url
+ return self.success_url % self.object.__dict__
  else:
  raise ImproperlyConfigured(
  "No URL to redirect to. Provide a success_url.")

docs/ref/class-based-views/mixins-editing.txt

@@ -201,6 +201,13 @@ ProcessFormView
  The url to redirect to when the nominated object has been
  successfully deleted.
 
+ .. versionadded:: 1.6
+
+ ``success_url`` may contain dictionary string formatting, which
+ will be interpolated against the object's field attributes. For
+ example, you could use ``success_url="/parent/%(parent_id)s/"`` to
+ redirect to a URL composed out of the ``parent_id`` field on a model.
+
  .. method:: get_success_url(obj)
 
  Returns the url to redirect to when the nominated object has been

docs/releases/1.6.txt

@@ -64,6 +64,10 @@ Minor features
  :attr:`~django.core.management.BaseCommand.leave_locale_alone` internal
  option. See :ref:`management-commands-and-locales` for more details.
 
+* The :attr:`~django.views.generic.edit.DeletionMixin.success_url` of
+ :class:`~django.views.generic.edit.DeletionMixin` is now interpolated with
+ its ``object``\'s ``__dict__``.
+
 Backwards incompatible changes in 1.6
 =====================================
 

tests/regressiontests/generic_views/edit.py

@@ -13,12 +13,12 @@
 
 
 class FormMixinTests(TestCase):
-  def test_initial_data(self):
-  """ Test instance independence of initial data dict (see #16138) """
-  initial_1 = FormMixin().get_initial()
-  initial_1['foo'] = 'bar'
-  initial_2 = FormMixin().get_initial()
-  self.assertNotEqual(initial_1, initial_2)
+ def test_initial_data(self):
+ """ Test instance independence of initial data dict (see #16138) """
+ initial_1 = FormMixin().get_initial()
+ initial_1['foo'] = 'bar'
+ initial_2 = FormMixin().get_initial()
+ self.assertNotEqual(initial_1, initial_2)
 
 
 class BasicFormTests(TestCase):
@@ -283,6 +283,13 @@ def test_delete_with_redirect(self):
  self.assertRedirects(res, 'http://testserver/edit/authors/create/')
  self.assertQuerysetEqual(Author.objects.all(), [])
 
+ def test_delete_with_interpolated_redirect(self):
+ a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
+ res = self.client.post('/edit/author/%d/delete/interpolate_redirect/' % a.pk)
+ self.assertEqual(res.status_code, 302)
+ self.assertRedirects(res, 'http://testserver/edit/authors/create/?deleted=%d' % a.pk)
+ self.assertQuerysetEqual(Author.objects.all(), [])
+
  def test_delete_with_special_properties(self):
  a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
  res = self.client.get('/edit/author/%d/delete/special/' % a.pk)

tests/regressiontests/generic_views/urls.py

@@ -97,6 +97,8 @@
  views.NaiveAuthorDelete.as_view()),
  (r'^edit/author/(?P<pk>\d+)/delete/redirect/$',
  views.NaiveAuthorDelete.as_view(success_url='/edit/authors/create/')),
+ (r'^edit/author/(?P<pk>\d+)/delete/interpolate_redirect/$',
+ views.NaiveAuthorDelete.as_view(success_url='/edit/authors/create/?deleted=%(id)s')),
  (r'^edit/author/(?P<pk>\d+)/delete/$',
  views.AuthorDelete.as_view()),
  (r'^edit/author/(?P<pk>\d+)/delete/special/$',