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| -rw-r--r-- | docs/topics/db/queries.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/topics/db/queries.txt b/docs/topics/db/queries.txt index f10d92576d..5e0ea8fa3e 100644 --- a/docs/topics/db/queries.txt +++ b/docs/topics/db/queries.txt @@ -910,6 +910,14 @@ To query for missing keys, use the ``isnull`` lookup:: :lookup:`istartswith`, :lookup:`lt`, :lookup:`lte`, :lookup:`gt`, and :lookup:`gte`, as well as with :ref:`containment-and-key-lookups`. +.. note:: + + Due to the way in which key-path queries work, + :meth:`~django.db.models.query.QuerySet.exclude` and + :meth:`~django.db.models.query.QuerySet.filter` are not guaranteed to + produce exhaustive sets. If you want to include objects that do not have + the path, add the ``isnull`` lookup. + .. warning:: Since any string could be a key in a JSON object, any lookup other than |