diff options
| author | Aymeric Augustin <aymeric.augustin@m4x.org> | 2014-05-07 22:03:10 +0200 |
|---|---|---|
| committer | Aymeric Augustin <aymeric.augustin@m4x.org> | 2014-05-08 22:11:20 +0200 |
| commit | cff59bedc23fd4d53557f677ddc42402b56963d0 (patch) | |
| tree | 3ee14b070476d65b89fa0d5cdadb415e6710fa89 /django | |
| parent | c70a61eb49e4ed8f3b2a5011a7a5e6cda43c8598 (diff) | |
Split ignores_nulls_in_unique_constraints feature.
Oracle and SQL Server don't have exactly the same limitations. It's
worth treating them differently.
Diffstat (limited to 'django')
| -rw-r--r-- | django/db/backends/__init__.py | 9 | ||||
| -rw-r--r-- | django/db/backends/oracle/base.py | 2 |
2 files changed, 8 insertions, 3 deletions
diff --git a/django/db/backends/__init__.py b/django/db/backends/__init__.py index a9bf3ea9cb..97e42d8f50 100644 --- a/django/db/backends/__init__.py +++ b/django/db/backends/__init__.py @@ -473,9 +473,14 @@ class BaseDatabaseFeatures(object): # Does the backend distinguish between '' and None? interprets_empty_strings_as_nulls = False + # Does the backend allow inserting duplicate NULL rows in a nullable + # unique field? All core backends implement this correctly, but other + # databases such as SQL Server do not. + supports_nullable_unique_constraints = True + # Does the backend allow inserting duplicate rows when a unique_together - # constraint exists, but one of the unique_together columns is NULL? - ignores_nulls_in_unique_constraints = True + # constraint exists and some fields are nullable but not all of them? + supports_partially_nullable_unique_constraints = True can_use_chunked_reads = True can_return_id_from_insert = False diff --git a/django/db/backends/oracle/base.py b/django/db/backends/oracle/base.py index e46b4f2db8..e53c8c9fb6 100644 --- a/django/db/backends/oracle/base.py +++ b/django/db/backends/oracle/base.py @@ -107,7 +107,7 @@ class DatabaseFeatures(BaseDatabaseFeatures): has_zoneinfo_database = pytz is not None supports_bitwise_or = False can_defer_constraint_checks = True - ignores_nulls_in_unique_constraints = False + supports_partially_nullable_unique_constraints = False has_bulk_insert = True supports_tablespaces = True supports_sequence_reset = False |