def test_database_begin__starts_new_transaction(db: Database):
with db.begin() as session:
assert isinstance(session, Session)
assert session.in_transaction()
with db.begin() as other_session:
assert other_session is not session
def test_session_save_all__raises_on_duplicate_primary_keys_in_list(
db: Database):
users = [User(id=1), User(id=1)]
with pytest.raises(TypeError):
with db.begin() as session:
session.save_all(users)
def create_users(db: Database,
count: int = 3,
overrides: t.Optional[dict] = None) -> t.List[User]:
if overrides is None:
overrides = {}
users = [User(id=i, **overrides) for i in range(1, count + 1)]
with db.begin(expire_on_commit=False) as session:
session.add_all(users)
return users
def test_session_save_all__accepts_single_model_and_returns_list(db: Database):
user = User()
with db.begin() as session:
result = session.save_all(user)
assert isinstance(result, list)
assert result == [user]
with db.session() as session:
select_count = sa.select(sa.func.count(User.id))
assert session.one(select_count) == 1
def test_session_save_all__returns_list(db: Database):
users = [User(), User(), User()]
with db.begin() as session:
result = session.save_all(users)
assert isinstance(result, list)
assert result == users
with db.session() as session:
select_count = sa.select(sa.func.count(User.id))
assert session.one(select_count) == len(users)
def test_session_save__inserts_new_without_pk(db: Database):
user = User(name="n")
with db.begin() as session:
session.save(user)
assert user.id == 1
assert user.name == "n"
with db.session() as session:
select_count = sa.select(sa.func.count(User.id))
assert session.one(select_count) == 1
def test_model_to_dict__loaded_from_database(db: Database, model: ModelBase,
args: dict, load_options: list,
expected: dict):
with db.begin() as session:
session.add(model)
with db.session() as session:
fetched_model = session.first(
type(model).select().options(*load_options))
assert fetched_model is not None
assert fetched_model.to_dict(**args) == expected
def test_session_save_all__inserts_and_updates_multiple_types(db: Database):
existing_users = [User(name="uA"), User(name="uB"), User(name="uC")]
new_users = [User(name="u1"), User(name="u2"), User(name="u3")]
existing_groups = [Group(name="gA"), Group(name="gB"), Group(name="gC")]
new_groups = [Group(name="g1"), Group(name="g2"), Group(name="g3")]
with db.begin(expire_on_commit=False) as session:
session.save_all(existing_users)
session.save_all(existing_groups)
all_models = existing_users + existing_groups + new_users + new_groups # type: ignore
all_users = existing_users + new_users
all_groups = existing_groups + new_groups
with db.begin() as session:
session.save_all(all_models)
with db.session() as session:
count_users = sa.select(sa.func.count(User.id))
assert session.one(count_users) == len(all_users)
count_groups = sa.select(sa.func.count(Group.id))
assert session.one(count_groups) == len(all_groups)
def test_session_save__updates_existing(db: Database):
existing_user = create_users(db, count=1)[0]
assert existing_user.id == 1
assert existing_user.name is None
new_user = User(id=1, name="n")
with db.begin() as session:
session.save(existing_user)
assert new_user.id == 1
assert new_user.name == "n"
with db.session() as session:
select_count = sa.select(sa.func.count(User.id))
assert session.one(select_count) == 1
def test_session_all__uniquifies_joinedload_results(db: Database):
users = [
User(id=1, addresses=[Address(id=11),
Address(id=12),
Address(id=13)]),
User(id=2, addresses=[Address(id=21),
Address(id=22),
Address(id=23)]),
User(id=3, addresses=[Address(id=31),
Address(id=32),
Address(id=33)]),
]
with db.begin() as session:
session.add_all(users)
stmt = sa.select(User).options(joinedload(User.addresses))
with db.session() as session:
results = session.all(stmt)
assert len(results) == len(users)