def test_column_mapped_collection(self):
users, addresses = self.tables.users, self.tables.addresses
mapper(
User,
users,
properties={
"addresses": relationship(
Address,
collection_class=column_mapped_collection(
addresses.c.email_address
),
)
},
)
mapper(Address, addresses)
u1 = User()
u1.addresses = {
"email1": Address(email_address="email1"),
"email2": Address(email_address="email2"),
}
for loads, dumps in picklers():
repickled = loads(dumps(u1))
eq_(u1.addresses, repickled.addresses)
eq_(repickled.addresses["email1"], Address(email_address="email1"))
def test_09_pickle(self):
users = self.tables.users
mapper(User, users)
sess = Session()
sess.add(User(id=1, name="ed"))
sess.commit()
sess.close()
inst = User(id=1, name="ed")
del inst._sa_instance_state
state = sa_state.InstanceState.__new__(sa_state.InstanceState)
state_09 = {
"class_": User,
"modified": False,
"committed_state": {},
"instance": inst,
"callables": {"name": state, "id": state},
"key": (User, (1,)),
"expired": True,
}
manager = instrumentation._SerializeManager.__new__(
instrumentation._SerializeManager
)
manager.class_ = User
state_09["manager"] = manager
state.__setstate__(state_09)
eq_(state.expired_attributes, {"name", "id"})
sess = Session()
sess.add(inst)
eq_(inst.name, "ed")
# test identity_token expansion
eq_(sa.inspect(inst).key, (User, (1,), None))
def test_composite_column_mapped_collection(self):
users, addresses = self.tables.users, self.tables.addresses
mapper(
User,
users,
properties={
"addresses": relationship(
Address,
collection_class=column_mapped_collection(
[addresses.c.id, addresses.c.email_address]
),
)
},
)
mapper(Address, addresses)
u1 = User()
u1.addresses = {
(1, "email1"): Address(id=1, email_address="email1"),
(2, "email2"): Address(id=2, email_address="email2"),
}
for loads, dumps in picklers():
repickled = loads(dumps(u1))
eq_(u1.addresses, repickled.addresses)
eq_(
repickled.addresses[(1, "email1")],
Address(id=1, email_address="email1"),
)
def test_instance_deferred_cols(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, backref="user")},
)
mapper(Address, addresses)
sess = create_session()
u1 = User(name="ed")
u1.addresses.append(Address(email_address="*****@*****.**"))
sess.add(u1)
sess.flush()
sess.expunge_all()
u1 = (
sess.query(User)
.options(
sa.orm.defer("name"), sa.orm.defer("addresses.email_address")
)
.get(u1.id)
)
assert "name" not in u1.__dict__
assert "addresses" not in u1.__dict__
u2 = pickle.loads(pickle.dumps(u1))
sess2 = create_session()
sess2.add(u2)
eq_(u2.name, "ed")
assert "addresses" not in u2.__dict__
ad = u2.addresses[0]
assert "email_address" not in ad.__dict__
eq_(ad.email_address, "*****@*****.**")
eq_(
u2,
User(name="ed", addresses=[Address(email_address="*****@*****.**")]),
)
u2 = pickle.loads(pickle.dumps(u1))
sess2 = create_session()
u2 = sess2.merge(u2, load=False)
eq_(u2.name, "ed")
assert "addresses" not in u2.__dict__
ad = u2.addresses[0]
# mapper options now transmit over merge(),
# new as of 0.6, so email_address is deferred.
assert "email_address" not in ad.__dict__
eq_(ad.email_address, "*****@*****.**")
eq_(
u2,
User(name="ed", addresses=[Address(email_address="*****@*****.**")]),
)
def test_11_pickle(self):
users = self.tables.users
mapper(User, users)
sess = Session()
u1 = User(id=1, name="ed")
sess.add(u1)
sess.commit()
sess.close()
manager = instrumentation._SerializeManager.__new__(
instrumentation._SerializeManager
)
manager.class_ = User
state_11 = {
"class_": User,
"modified": False,
"committed_state": {},
"instance": u1,
"manager": manager,
"key": (User, (1,)),
"expired_attributes": set(),
"expired": True,
}
state = sa_state.InstanceState.__new__(sa_state.InstanceState)
state.__setstate__(state_11)
eq_(state.identity_token, None)
eq_(state.identity_key, (User, (1,), None))
def _option_test_fixture(self):
users, addresses, dingalings = (
self.tables.users,
self.tables.addresses,
self.tables.dingalings,
)
mapper(
User,
users,
properties={"addresses": relationship(Address, backref="user")},
)
mapper(
Address,
addresses,
properties={"dingaling": relationship(Dingaling)},
)
mapper(Dingaling, dingalings)
sess = create_session()
u1 = User(name="ed")
u1.addresses.append(Address(email_address="*****@*****.**"))
sess.add(u1)
sess.flush()
sess.expunge_all()
return sess, User, Address, Dingaling
def test_class_deferred_cols(self):
addresses, users = (self.tables.addresses, self.tables.users)
mapper(
User,
users,
properties={
"name": sa.orm.deferred(users.c.name),
"addresses": relationship(Address, backref="user"),
},
)
mapper(
Address,
addresses,
properties={
"email_address": sa.orm.deferred(addresses.c.email_address)
},
)
sess = create_session()
u1 = User(name="ed")
u1.addresses.append(Address(email_address="*****@*****.**"))
sess.add(u1)
sess.flush()
sess.expunge_all()
u1 = sess.query(User).get(u1.id)
assert "name" not in u1.__dict__
assert "addresses" not in u1.__dict__
u2 = pickle.loads(pickle.dumps(u1))
sess2 = create_session()
sess2.add(u2)
eq_(u2.name, "ed")
eq_(
u2,
User(name="ed", addresses=[Address(email_address="*****@*****.**")]),
)
u2 = pickle.loads(pickle.dumps(u1))
sess2 = create_session()
u2 = sess2.merge(u2, load=False)
eq_(u2.name, "ed")
eq_(
u2,
User(name="ed", addresses=[Address(email_address="*****@*****.**")]),
)
def test_exceptions(self):
class Foo(object):
pass
users = self.tables.users
mapper(User, users)
for sa_exc in (
orm_exc.UnmappedInstanceError(Foo()),
orm_exc.UnmappedClassError(Foo),
orm_exc.ObjectDeletedError(attributes.instance_state(User())),
):
for loads, dumps in picklers():
repickled = loads(dumps(sa_exc))
eq_(repickled.args[0], sa_exc.args[0])
def test_state_info_pickle(self):
users = self.tables.users
mapper(User, users)
u1 = User(id=1, name="ed")
sa.inspect(u1).info["some_key"] = "value"
state_dict = sa.inspect(u1).__getstate__()
state = sa_state.InstanceState.__new__(sa_state.InstanceState)
state.__setstate__(state_dict)
u2 = state.obj()
eq_(sa.inspect(u2).info["some_key"], "value")
def test_invalidated_flag_deepcopy(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, lazy="noload")},
)
mapper(Address, addresses)
u1 = User()
u1.addresses.append(Address())
u2 = copy.deepcopy(u1)
u2.addresses.append(Address())
eq_(len(u2.addresses), 2)
def test_invalidated_flag_pickle(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, lazy="noload")},
)
mapper(Address, addresses)
u1 = User()
u1.addresses.append(Address())
u2 = pickle.loads(pickle.dumps(u1))
u2.addresses.append(Address())
eq_(len(u2.addresses), 2)
def test_no_instrumentation(self):
users = self.tables.users
mapper(User, users)
u1 = User(name="ed")
u1_pickled = pickle.dumps(u1, -1)
clear_mappers()
mapper(User, users)
u1 = pickle.loads(u1_pickled)
# this fails unless the InstanceState
# compiles the mapper
eq_(str(u1), "User(name='ed')")
def test_no_mappers(self):
users = self.tables.users
mapper(User, users)
u1 = User(name="ed")
u1_pickled = pickle.dumps(u1, -1)
clear_mappers()
assert_raises_message(
orm_exc.UnmappedInstanceError,
"Cannot deserialize object of type "
"<class 'sqlalchemy_1_3.testing.pickleable.User'> - no mapper()",
pickle.loads,
u1_pickled,
)
def test_rebuild_state(self):
"""not much of a 'test', but illustrate how to
remove instance-level state before pickling.
"""
users = self.tables.users
mapper(User, users)
u1 = User()
attributes.manager_of_class(User).teardown_instance(u1)
assert not u1.__dict__
u2 = pickle.loads(pickle.dumps(u1))
attributes.manager_of_class(User).setup_instance(u2)
assert attributes.instance_state(u2)
def test_transient(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, backref="user")},
)
mapper(Address, addresses)
sess = create_session()
u1 = User(name="ed")
u1.addresses.append(Address(email_address="*****@*****.**"))
u2 = pickle.loads(pickle.dumps(u1))
sess.add(u2)
sess.flush()
sess.expunge_all()
eq_(u1, sess.query(User).get(u2.id))
def test_pickle_protocols(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, backref="user")},
)
mapper(Address, addresses)
sess = sessionmaker()()
u1 = User(name="ed")
u1.addresses.append(Address(email_address="*****@*****.**"))
sess.add(u1)
sess.commit()
u1 = sess.query(User).first()
u1.addresses
for loads, dumps in picklers():
u2 = loads(dumps(u1))
eq_(u1, u2)
def test_instance_lazy_relation_loaders(self):
users, addresses = (self.tables.users, self.tables.addresses)
mapper(
User,
users,
properties={"addresses": relationship(Address, lazy="noload")},
)
mapper(Address, addresses)
sess = Session()
u1 = User(name="ed", addresses=[Address(email_address="*****@*****.**")])
sess.add(u1)
sess.commit()
sess.close()
u1 = sess.query(User).options(lazyload(User.addresses)).first()
u2 = pickle.loads(pickle.dumps(u1))
sess = Session()
sess.add(u2)
assert u2.addresses