#24386: Querysets with filters and exclusions based on deep relations build
invalid
queries
-------------------------------------+-------------------------------------
Reporter: rtpg | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 1 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by rtpg):
I don't know if annotations allow me to work around this. I need to find
the minimum of only active employees, but to my knowledge the aggregates
don't really work in combination with filters:
I added a {{{number}}} field to my Employee model:
{{{
In [5]: Employee.objects.annotate(Sum('owner__employee__number')).values()
Out[5]: [{'status': u'not_active', 'number': 3, u'id': 2,
'owner__employee__number__sum': 7, 'start_date': datetime.date(2015, 2,
23), u'owner_id': 1}, {'status': u'active', 'number': 4, u'id': 1,
'owner__employee__number__sum': 7, 'start_date': datetime.date(2015, 2,
23), u'owner_id': 1}]
In [6]:
Employee.objects.filter(number=4).annotate(Sum('owner__employee__number')).values()
Out[6]: [{'status': u'active', 'number': 4, u'id': 1,
'owner__employee__number__sum': 7, 'start_date': datetime.date(2015, 2,
23), u'owner_id': 1}]
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/24386#comment:2>
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