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[1.8.x] Fixed #24690 -- Added a warning about mutable defaults for ArrayField. 

Backport of f93e7f5674 from master
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Tim Graham 2015-07-31 12:16:45 -04:00
parent b46dad1bef
commit ef5cf564bf
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6
docs/ref/contrib/postgres/fields.txt
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@ -17,6 +17,12 @@ ArrayField
<ArrayField.size>`. ``ArrayField`` can be nested to store multi-dimensional <ArrayField.size>`. ``ArrayField`` can be nested to store multi-dimensional
arrays. arrays.
If you give the field a :attr:`~django.db.models.Field.default`, ensure
it's a callable such as ``list`` (for an empty default) or a callable that
returns a list (such as a function). Incorrectly using ``default=[]``
creates a mutable default that is shared between all instances of
``ArrayField``.
.. attribute:: base_field .. attribute:: base_field
This is a required argument. This is a required argument.