# testing/fixtures/orm.py
# Copyright (C) 2005-2025 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php
# mypy: ignore-errors
from __future__ import annotations
from typing import Any
import sqlalchemy as sa
from .base import TestBase
from .sql import TablesTest
from .. import assertions
from .. import config
from .. import schema
from ..entities import BasicEntity
from ..entities import ComparableEntity
from ..util import adict
from ... import orm
from ...orm import DeclarativeBase
from ...orm import events as orm_events
from ...orm import registry
class ORMTest(TestBase):
@config.fixture
def fixture_session(self):
return fixture_session()
class MappedTest(ORMTest, TablesTest, assertions.AssertsExecutionResults):
# 'once', 'each', None
run_setup_classes = "once"
# 'once', 'each', None
run_setup_mappers = "each"
classes: Any = None
@config.fixture(autouse=True, scope="class")
def _setup_tables_test_class(self):
cls = self.__class__
cls._init_class()
if cls.classes is None:
cls.classes = adict()
cls._setup_once_tables()
cls._setup_once_classes()
cls._setup_once_mappers()
cls._setup_once_inserts()
yield
cls._teardown_once_class()
cls._teardown_once_metadata_bind()
@config.fixture(autouse=True, scope="function")
def _setup_tables_test_instance(self):
self._setup_each_tables()
self._setup_each_classes()
self._setup_each_mappers()
self._setup_each_inserts()
yield
orm.session.close_all_sessions()
self._teardown_each_mappers()
self._teardown_each_classes()
self._teardown_each_tables()
@classmethod
def _teardown_once_class(cls):
cls.classes.clear()
@classmethod
def _setup_once_classes(cls):
if cls.run_setup_classes == "once":
cls._with_register_classes(cls.setup_classes)
@classmethod
def _setup_once_mappers(cls):
if cls.run_setup_mappers == "once":
cls.mapper_registry, cls.mapper = cls._generate_registry()
cls._with_register_classes(cls.setup_mappers)
def _setup_each_mappers(self):
if self.run_setup_mappers != "once":
(
self.__class__.mapper_registry,
self.__class__.mapper,
) = self._generate_registry()
if self.run_setup_mappers == "each":
self._with_register_classes(self.setup_mappers)
def _setup_each_classes(self):
if self.run_setup_classes == "each":
self._with_register_classes(self.setup_classes)
@classmethod
def _generate_registry(cls):
decl = registry(metadata=cls._tables_metadata)
return decl, decl.map_imperatively
@classmethod
def _with_register_classes(cls, fn):
"""Run a setup method, framing the operation with a Base class
that will catch new subclasses to be established within
the "classes" registry.
"""
cls_registry = cls.classes
class _Base:
def __init_subclass__(cls) -> None:
assert cls_registry is not None
cls_registry[cls.__name__] = cls
super().__init_subclass__()
class Basic(BasicEntity, _Base):
pass
class Comparable(ComparableEntity, _Base):
pass
cls.Basic = Basic
cls.Comparable = Comparable
fn()
def _teardown_each_mappers(self):
# some tests create mappers in the test bodies
# and will define setup_mappers as None -
# clear mappers in any case
if self.run_setup_mappers != "once":
orm.clear_mappers()
def _teardown_each_classes(self):
if self.run_setup_classes != "once":
self.classes.clear()
@classmethod
def setup_classes(cls):
pass
@classmethod
def setup_mappers(cls):
pass
class DeclarativeMappedTest(MappedTest):
run_setup_classes = "once"
run_setup_mappers = "once"
@classmethod
def _setup_once_tables(cls):
pass
@classmethod
def _with_register_classes(cls, fn):
cls_registry = cls.classes
class _DeclBase(DeclarativeBase):
__table_cls__ = schema.Table
metadata = cls._tables_metadata
type_annotation_map = {
str: sa.String().with_variant(
sa.String(50), "mysql", "mariadb", "oracle"
)
}
def __init_subclass__(cls, **kw) -> None:
assert cls_registry is not None
cls_registry[cls.__name__] = cls
super().__init_subclass__(**kw)
cls.DeclarativeBasic = _DeclBase
# sets up cls.Basic which is helpful for things like composite
# classes
super()._with_register_classes(fn)
if cls._tables_metadata.tables and cls.run_create_tables:
cls._tables_metadata.create_all(config.db)
class RemoveORMEventsGlobally:
@config.fixture(autouse=True)
def _remove_listeners(self):
yield
orm_events.MapperEvents._clear()
orm_events.InstanceEvents._clear()
orm_events.SessionEvents._clear()
orm_events.InstrumentationEvents._clear()
orm_events.QueryEvents._clear()
_fixture_sessions = set()
def fixture_session(**kw):
kw.setdefault("autoflush", True)
kw.setdefault("expire_on_commit", True)
bind = kw.pop("bind", config.db)
sess = orm.Session(bind, **kw)
_fixture_sessions.add(sess)
return sess
def close_all_sessions():
# will close all still-referenced sessions
orm.close_all_sessions()
_fixture_sessions.clear()
def stop_test_class_inside_fixtures(cls):
close_all_sessions()
orm.clear_mappers()
def after_test():
if _fixture_sessions:
close_all_sessions()
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