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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/ref/contrib/postgres/fields.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/ref/contrib/postgres/fields.txt b/docs/ref/contrib/postgres/fields.txt index 3d36018893..fb9ed14fd9 100644 --- a/docs/ref/contrib/postgres/fields.txt +++ b/docs/ref/contrib/postgres/fields.txt @@ -17,6 +17,12 @@ ArrayField <ArrayField.size>`. ``ArrayField`` can be nested to store multi-dimensional 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 This is a required argument. |