#27222: Refresh expressions on save
-------------------------------------+-------------------------------------
Reporter: holvianssi | Owner: nobody
Type: New feature | Status: new
Component: Database layer | Version: 1.10
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by holvianssi):
* needs_better_patch: => 0
* needs_tests: => 0
* needs_docs: => 0
Old description:
> The use case is automatically fetching the value for expressions when
> saving to DB. For example:
> {{{
> > user = User.objects.create(username=Lower('Anssi'))
> > user.username == 'anssi'
> True
> }}}
New description:
The use case is automatically fetching the value for expressions when
saving to DB. For example:
{{{
> user = User.objects.create(username=Lower('Anssi'))
> user.username == 'anssi'
True
}}}
While the above feature can be simulated somewhat easily by calling
refresh_from_db() after save, an in-built implementation has the ability
to use RETURNING as an optimization. In addition, it seems that refreshing
objects on save would be a nice default, though this might be a bit
backwards incompatible in some cases.
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Ticket URL: <https://code.djangoproject.com/ticket/27222#comment:1>
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