Opened 9 years ago
Closed 9 years ago
#28240 closed Bug (needsinfo)
django.db.models.query.values not acting as documented
| Reported by: | Meckl Antal | Owned by: | nobody |
|---|---|---|---|
| Component: | Database layer (models, ORM) | Version: | 1.11 |
| Severity: | Normal | Keywords: | |
| Cc: | Triage Stage: | Unreviewed | |
| Has patch: | no | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
Hello, I'm using .values() to select distinct values and annotate them with a Count.
Here is the example code:
MyObjects.objects.values('image')
QuerySet [
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'dbd582eb-c8b6-45d8-8787-24fc8467cbce'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'image': u'dbd582eb-c8b6-45d8-8787-24fc8467cbce'},
{'image': u'40476fd4-ad65-4846-b307-51ddf901da53'}]
The documentation says:
...you will only get an annotated result for each unique author name...
Change History (4)
comment:1 by , 9 years ago
| Component: | Uncategorized → Database layer (models, ORM) |
|---|
comment:2 by , 9 years ago
Yes, I know, I forgot to place it. But I think it doesn't matter, the values() should return unique values.
Here is the code with annotate.
MyObject.objects.values('image').exclude(terminated_at__isnull=False).annotate(count=Count('id'),)
QuerySet [
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'dbd582eb-c8b6-45d8-8787-24fc8467cbce'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'},
{'count': 1, 'image': u'dbd582eb-c8b6-45d8-8787-24fc8467cbce'},
{'count': 1, 'image': u'40476fd4-ad65-4846-b307-51ddf901da53'}]
comment:3 by , 9 years ago
If there is something in the documentation in QuerySet.values() documentation that implies it returns distinct values, please let us know. That shouldn't be the case.
As for your issue, please include a complete test case with minimal models and data.
comment:4 by , 9 years ago
| Resolution: | → needsinfo |
|---|---|
| Status: | new → closed |
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Your example code doesn't include an
annotate()?