#28649: Add "week_year" lookup to DateField/DateTimeField
-------------------------------------+-------------------------------------
Reporter: Sigurd | Owner: nobody
Ljødal |
Type: New | Status: assigned
feature |
Component: Database | Version: master
layer (models, ORM) |
Severity: Normal | Keywords: ORM Extract
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
I found myself in the need to extract the ISO year/week-numbering year (as
specified by ISO 8601) from a date/datetime field, e.g. to group values by
week. This is easy with PostgreSQL:
{{{
from django.db.models.functions import Extract, ExtractWeek
SomeModel.objects.annotate(
year=Extract('some_date', 'isoyear'),
week=ExtractWeek('some_date'),
).values(
'year', 'week',
).annotate(
sum=Sum('some_field'),
)
}}}
but unfortunately this does not work across databases. I've implemented an
`ExtractWeekYear` class with support for all databases and will submit a
pull request shortly.
--
Ticket URL: <https://code.djangoproject.com/ticket/28649>
Django <https://code.djangoproject.com/>
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