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Code Issues 32 Releases Wiki Activity

queryset-refactor: Implemented a way to differentiate between filtering on a

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single instance and filtering on multiple instances when spanning a
multi-valued relationship.


git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@7317 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Malcolm Tredinnick
2008-03-19 11:02:22 +00:00
parent c085697858
commit d20996b58d
3 changed files with 83 additions and 13 deletions
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17
tests/regressiontests/queries/models.py
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@@ -210,11 +210,24 @@ True
>>> Item.objects.filter(Q(tags=t1)).order_by('name')
[<Item: one>, <Item: two>]
>>> Item.objects.filter(Q(tags=t1) & Q(tags=t2))
[<Item: one>]
>>> Item.objects.filter(Q(tags=t1)).filter(Q(tags=t2))
[<Item: one>]
Each filter call is processed "at once" against a single table, so this is
different from the previous example as it tries to find tags that are two
things at once (rather than two tags).
>>> Item.objects.filter(Q(tags=t1) & Q(tags=t2))
[]
>>> qs = Author.objects.filter(ranking__rank=2, ranking__id=rank1.id)
>>> list(qs)
[<Author: a2>]
>>> qs.query.count_active_tables()
2
>>> qs = Author.objects.filter(ranking__rank=2).filter(ranking__id=rank1.id)
>>> qs.query.count_active_tables()
3
Bug #4464
>>> Item.objects.filter(tags=t1).filter(tags=t2)
[<Item: one>]