[1.8.x] Fixed #24851 -- Fixed crash with reverse one-to-one relation in ModelAdmin.list_display

        except ObjectDoesNotExist:

            result_repr = EMPTY_CHANGELIST_VALUE

        else:

            if f is None:

            if f is None or f.auto_created:

                if field_name == 'action_checkbox':

                    row_classes = ['action-checkbox']

                allow_tags = getattr(attr, 'allow_tags', False)

            except FieldDoesNotExist:

                pass

            else:

                if isinstance(field.rel, models.ManyToOneRel):

                if hasattr(field, 'rel') and isinstance(field.rel, models.ManyToOneRel):

                    return True

        return False

* Prevented the loss of ``null``/``not null`` column properties during field

  renaming of MySQL databases (:ticket:`24817`).

* Fixed a crash when using a reverse one-to-one relation in

  ``ModelAdmin.list_display`` (:ticket:`24851`).

class SwallowAdmin(admin.ModelAdmin):

    actions = None  # prevent ['action_checkbox'] + list(list_display)

    list_display = ('origin', 'load', 'speed')

    list_display = ('origin', 'load', 'speed', 'swallowonetoone')

site.register(Swallow, SwallowAdmin)

        ordering = ('speed', 'load')

class SwallowOneToOne(models.Model):

    swallow = models.OneToOneField(Swallow)

class UnorderedObject(models.Model):

    """

    Model without any defined `Meta.ordering`.