          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()
  
          Returns the url to redirect to when the nominated object has been
          successfully deleted. Returns
 
</s> remove     Raises :exc:`InvalidPage` if previous page doesn't exist.
 </s> add         Raises :exc:`InvalidPage` if previous page doesn't exist. </s> remove     The current value of the field will be displayed as a clickable link above the
    input widget.
 </s> add         The current value of the field will be displayed as a clickable link above the
        input widget. </s> remove This setting now also accepts view function names and
:ref:`named URL patterns <naming-url-patterns>` which can be used to reduce
configuration duplication since you no longer have to define the URL in two
places (``settings`` and URLconf).
For backward compatibility reasons the default remains unchanged.
 </s> add     This setting now also accepts view function names and
    :ref:`named URL patterns <naming-url-patterns>` which can be used to reduce
    configuration duplication since you no longer have to define the URL in two
    places (``settings`` and URLconf).
    For backward compatibility reasons the default remains unchanged. </s> remove This setting now also accepts view function names and
:ref:`named URL patterns <naming-url-patterns>` which can be used to reduce
configuration duplication since you no longer have to define the URL in two
places (``settings`` and URLconf).
For backward compatibility reasons the default remains unchanged.
 </s> add     This setting now also accepts view function names and
    :ref:`named URL patterns <naming-url-patterns>` which can be used to reduce
    configuration duplication since you no longer have to define the URL in two
    places (``settings`` and URLconf).
    For backward compatibility reasons the default remains unchanged. </s> remove Some fields in a model won't be deferred, even if you ask for them. You can
never defer the loading of the primary key. If you are using
:meth:`select_related()` to retrieve related models, you shouldn't defer the
loading of the field that connects from the primary model to the related
one, doing so will result in an error.
 </s> add     Some fields in a model won't be deferred, even if you ask for them. You can
    never defer the loading of the primary key. If you are using
    :meth:`select_related()` to retrieve related models, you shouldn't defer the
    loading of the field that connects from the primary model to the related
    one, doing so will result in an error.
            ``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.
          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.
            ``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.
            ``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.
            ``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()
  
          Returns the url to redirect to when the nominated object has been
          successfully deleted. Returns
keep keep keep keep replace replace replace replace keep keep keep keep keep
 Adapted uses of versionchanged/versionadded to the new form.

Refs #20104. 
docs/ref/class-based-views/mixins-editing.txt