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[1.7.x] Split ignores_nulls_in_unique_constraints feature.

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Oracle and SQL Server don't have exactly the same limitations. It's
worth treating them differently.

Backport of cff59bed from master
This commit is contained in:
Aymeric Augustin
2014-05-07 22:03:10 +02:00
parent e3bc11cca9
commit 92a1e71100
6 changed files with 12 additions and 6 deletions
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2
tests/one_to_one_regress/tests.py
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@@ -229,7 +229,7 @@ class OneToOneRegressionTests(TestCase):
# Several instances of the origin are only possible if database allows
# inserting multiple NULL rows for a unique constraint
if connection.features.ignores_nulls_in_unique_constraints:
if connection.features.supports_nullable_unique_constraints:
UndergroundBar.objects.create()
# When there are several instances of the origin