Fixed #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.

2 files changed, 11 insertions, 0 deletions

diff --git a/docs/ref/class-based-views/mixins-editing.txt b/docs/ref/class-based-views/mixins-editing.txt
index bce3c84cb1..844171c93a 100644
--- a/docs/ref/class-based-views/mixins-editing.txt
+++ b/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
diff --git a/docs/releases/1.6.txt b/docs/releases/1.6.txt
index f53fa8ac4c..5d615177f4 100644
--- a/docs/releases/1.6.txt
+++ b/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
 =====================================