Used backend vendors in custom model fields docs.
@@ -394,13 +394,14 @@ If you aim to build a database-agnostic application, you should account for
differences in database column types. For example, the date/time column type
in PostgreSQL is called ``timestamp``, while the same column in MySQL is called
``datetime``. You can handle this in a :meth:`~Field.db_type` method by
-checking the ``connection.settings_dict['ENGINE']`` attribute.
+checking the ``connection.vendor`` attribute. Current built-in vendor names
+are: ``sqlite``, ``postgresql``, ``mysql``, and ``oracle``.
For example::
class MyDateField(models.Field):
def db_type(self, connection):
- if connection.settings_dict['ENGINE'] == 'django.db.backends.mysql':
+ if connection.vendor == 'mysql':
return 'datetime'
else:
return 'timestamp'
