diff options
| -rw-r--r-- | django/db/backends/base/operations.py | 6 | ||||
| -rw-r--r-- | tests/backends/base/test_operations.py | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/django/db/backends/base/operations.py b/django/db/backends/base/operations.py index f6a043e31f..279297ac85 100644 --- a/django/db/backends/base/operations.py +++ b/django/db/backends/base/operations.py @@ -74,6 +74,12 @@ class BaseDatabaseOperations: """ return len(objs) + def format_for_duration_arithmetic(self, sql): + raise NotImplementedError( + 'subclasses of BaseDatabaseOperations may require a ' + 'format_for_duration_arithmetic() method.' + ) + def cache_key_culling_sql(self): """ Return an SQL query that retrieves the first cache key greater than the diff --git a/tests/backends/base/test_operations.py b/tests/backends/base/test_operations.py index 1cfea44e83..b7b7b9e3fc 100644 --- a/tests/backends/base/test_operations.py +++ b/tests/backends/base/test_operations.py @@ -85,6 +85,11 @@ class SimpleDatabaseOperationTests(SimpleTestCase): now = timezone.now() self.assertEqual(self.ops.adapt_timefield_value(now), str(now)) + def test_format_for_duration_arithmetic(self): + msg = self.may_require_msg % 'format_for_duration_arithmetic' + with self.assertRaisesMessage(NotImplementedError, msg): + self.ops.format_for_duration_arithmetic(None) + def test_date_extract_sql(self): with self.assertRaisesMessage(NotImplementedError, self.may_require_msg % 'date_extract_sql'): self.ops.date_extract_sql(None, None) |