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Fixed #24020 -- Refactored SQL compiler to use expressions

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Refactored compiler SELECT, GROUP BY and ORDER BY generation.
While there, also refactored select_related() implementation
(get_cached_row() and get_klass_info() are now gone!).

Made get_db_converters() method work on expressions instead of
internal_type. This allows the backend converters to target
specific expressions if need be.

Added query.context, this can be used to set per-query state.

Also changed the signature of database converters. They now accept
context as an argument.
This commit is contained in:
Anssi Kääriäinen 2014-12-01 09:28:01 +02:00 • committed by Tim Graham
parent b8abfe141b
commit 0c7633178f
41 changed files with 970 additions and 1416 deletions
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6
tests/queries/tests.py
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@ -3563,8 +3563,10 @@ class Ticket20955Tests(TestCase):
# version's queries.
task_get.creator.staffuser.staff
task_get.owner.staffuser.staff
task_select_related = Task.objects.select_related(
'creator__staffuser__staff', 'owner__staffuser__staff').get(pk=task.pk)
qs = Task.objects.select_related(
'creator__staffuser__staff', 'owner__staffuser__staff')
self.assertEqual(str(qs.query).count(' JOIN '), 6)
task_select_related = qs.get(pk=task.pk)
with self.assertNumQueries(0):
self.assertEqual(task_select_related.creator.staffuser.staff,
task_get.creator.staffuser.staff)