Update SQLAlchemy factory base to support generic typing

docs/changelog.rst

@@ -6,7 +6,7 @@ ChangeLog
 3.3.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Add typing information to SQLAlchemy model factory
 
 
 3.3.1 (2024-08-18)

factory/alchemy.py

@@ -1,5 +1,7 @@
 # Copyright: See the LICENSE file.
 
+from typing import TypeVar
+
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.orm.exc import NoResultFound
 
@@ -12,6 +14,7 @@
     SESSION_PERSISTENCE_COMMIT,
     SESSION_PERSISTENCE_FLUSH,
 ]
+T = TypeVar('T')
 
 
 class SQLAlchemyOptions(base.FactoryOptions):
@@ -43,7 +46,7 @@ def _build_default_options(self):
         ]
 
 
-class SQLAlchemyModelFactory(base.Factory):
+class SQLAlchemyModelFactory(base.Factory[T]):
     """Factory for SQLAlchemy models. """
 
     _options_class = SQLAlchemyOptions