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Fixed #25718 -- Made a JSONField lookup value of None match keys that have a null value.

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Dmitry Dygalo 2018-02-20 16:47:12 +01:00 • committed by Tim Graham
parent 4fe5d84666
commit c979c0a2b8
9 changed files with 70 additions and 5 deletions
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19
docs/ref/contrib/postgres/fields.txt
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@ -544,7 +544,7 @@ name::
... }],
... },
... })
>>> Dog.objects.create(name='Meg', data={'breed': 'collie'})
>>> Dog.objects.create(name='Meg', data={'breed': 'collie', 'owner': None})
>>> Dog.objects.filter(data__breed='collie')
<QuerySet [<Dog: Meg>]>
@ -566,6 +566,23 @@ the :lookup:`jsonfield.contains` lookup instead.
If only one key or index is used, the SQL operator ``->`` is used. If multiple
operators are used then the ``#>`` operator is used.
To query for ``null`` in JSON data, use ``None`` as a value::
>>> Dog.objects.filter(data__owner=None)
<QuerySet [<Dog: Meg>]>
To query for missing keys, use the ``isnull`` lookup::
>>> Dog.objects.create(name='Shep', data={'breed': 'collie'})
>>> Dog.objects.filter(data__owner__isnull=True)
<QuerySet [<Dog: Shep>]>
.. versionchanged:: 2.1
In older versions, using ``None`` as a lookup value matches objects that
don't have the key rather than objects that have the key with a ``None``
value.
.. warning::
Since any string could be a key in a JSON object, any lookup other than