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[1.4.X] Fixed #15566 - Documented that update() doesn't honor DateField.auto_now

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Thanks Shabda Raaj for the draft patch.

Backport of dc01e41d23 from master
This commit is contained in:
Tim Graham 2012-09-08 06:38:41 -04:00
parent 7e8483e70b
commit b0e2cb8e47
2 changed files with 10 additions and 9 deletions
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11
docs/topics/db/queries.txt
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@ -968,11 +968,12 @@ Be aware that the ``update()`` method is converted directly to an SQL
statement. It is a bulk operation for direct updates. It doesn't run any
:meth:`~django.db.models.Model.save` methods on your models, or emit the
``pre_save`` or ``post_save`` signals (which are a consequence of calling
:meth:`~django.db.models.Model.save`). If you want to save every item in a
:class:`~django.db.models.query.QuerySet` and make sure that the
:meth:`~django.db.models.Model.save` method is called on each instance, you
don't need any special function to handle that. Just loop over them and call
:meth:`~django.db.models.Model.save`::
:meth:`~django.db.models.Model.save`), or honor the
:attr:`~django.db.models.DateField.auto_now` field option.
If you want to save every item in a :class:`~django.db.models.query.QuerySet`
and make sure that the :meth:`~django.db.models.Model.save` method is called on
each instance, you don't need any special function to handle that. Just loop
over them and call :meth:`~django.db.models.Model.save`::
for item in my_queryset:
item.save()