#20581: Support DEFERRABLE INITIALLY DEFERRED for UNIQUE constraints
-------------------------------------+-------------------------------------
Reporter: dmadeley@… | Owner: nobody
Type: New feature | Status: new
Component: Database layer | Version: master
(models, ORM) | Resolution:
Severity: Normal | Triage Stage: Accepted
Keywords: | Needs documentation: 0
Has patch: 0 | Patch needs improvement: 0
Needs tests: 0 | UI/UX: 0
Easy pickings: 0 |
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Comment (by koniiiik):
My idea for an API was also to use something like `models.Unique(*fields,
deferrable=True, initially_deferred=True)`, but not as a Model class
attribute, but rather inside `unique_together`:
{{{
#!python
class OrderedItem(models.Model):
owner = ForeignKey('auth.User')
order = PositiveIntegerField()
data = TextField()
class Meta:
unique_together = (
models.Unique('owner', 'order', deferrable=True),
)
}}}
The idea is similar to urlpatterns – those also accept either a tuple, or
the result of a `url` call. Also, it doesn't add a new API for this kind
of constraints, merely extends the existing one.
--
Ticket URL: <https://code.djangoproject.com/ticket/20581#comment:4>
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