diff options
Diffstat (limited to 'docs/ref')
| -rw-r--r-- | docs/ref/contrib/contenttypes.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/ref/contrib/contenttypes.txt b/docs/ref/contrib/contenttypes.txt index e5635ef59e..bc73308b69 100644 --- a/docs/ref/contrib/contenttypes.txt +++ b/docs/ref/contrib/contenttypes.txt @@ -335,6 +335,13 @@ creating a ``TaggedItem``:: >>> t.content_object <User: Guido> +If the related object is deleted, the ``content_type`` and ``object_id`` fields +remain set to their original values and the ``GenericForeignKey`` returns +``None``:: + + >>> guido.delete() + >>> t.content_object # returns None + Due to the way :class:`~django.contrib.contenttypes.fields.GenericForeignKey` is implemented, you cannot use such fields directly with filters (``filter()`` and ``exclude()``, for example) via the database API. Because a |