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Fixed #12886 -- aggregation over sliced queryset

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Anssi Kääriäinen 2013-08-19 16:00:17 +03:00
parent 7d28bed13b
commit 7737305a4f
3 changed files with 14 additions and 7 deletions
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8
tests/aggregation/tests.py
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@ -617,3 +617,11 @@ class BaseAggregateTestCase(TestCase):
# Check internal state
self.assertIsNone(annotated_books.query.alias_map["aggregation_book"].join_type)
self.assertIsNone(excluded_books.query.alias_map["aggregation_book"].join_type)
def test_ticket12886(self):
"""
Check that aggregation over sliced queryset works correctly.
"""
qs = Book.objects.all().order_by('-rating')[0:3]
vals = qs.aggregate(average_top3_rating=Avg('rating'))['average_top3_rating']
self.assertAlmostEqual(vals, 4.5, places=2)