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Fixed #26787 -- Documented deleting and reloading of model instance fields.

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Thanks Julien Hartmann for the report.
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Tim Graham 2016-06-21 13:46:22 -04:00
parent 9c2d5a8d33
commit 20d1cb33c2
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12
docs/ref/models/instances.txt
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@ -128,6 +128,18 @@ in the ``from_db()`` method.
Refreshing objects from database
================================
If you delete a field from a model instance, accessing it again reloads the
value from the database::
>>> obj = MyModel.objects.first()
>>> del obj.field
>>> obj.field # Loads the field from the database
.. versionchanged:: 1.10
In older versions, accessing a deleted field raised ``AttributeError``
instead of reloading it.
.. method:: Model.refresh_from_db(using=None, fields=None)
If you need to reload a model's values from the database, you can use the