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_options_with_descriptors(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()
for opt in [
sa.orm.joinedload(User.addresses),
sa.orm.joinedload("addresses"),
sa.orm.defer("name"),
sa.orm.defer(User.name),
sa.orm.joinedload("addresses", Address.dingaling),
]:
opt2 = pickle.loads(pickle.dumps(opt))
eq_(opt.key, opt2.key)
u1 = sess.query(User).options(opt).first()
u2 = pickle.loads(pickle.dumps(u1))
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
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_attribute_mapped_collection(self):
users, addresses = self.tables.users, self.tables.addresses
mapper(User, users, properties={
'addresses':relationship(
Address,
collection_class=
attribute_mapped_collection('email_address')
)
})
mapper(Address, addresses)
u1 = User()
u1.addresses = {"email1":Address(email_address="email1")}
for loads, dumps in picklers():
repickled = loads(dumps(u1))
eq_(u1.addresses, repickled.addresses)
eq_(repickled.addresses['email1'],
Address(email_address="email1"))
def test_no_mappers(self):
users = self.tables.users
umapper = 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 'test.lib.pickleable.User'> - no mapper()",
pickle.loads, u1_pickled)
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_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_no_instrumentation(self):
users = self.tables.users
umapper = mapper(User, users)
u1 = User(name='ed')
u1_pickled = pickle.dumps(u1, -1)
clear_mappers()
umapper = mapper(User, users)
u1 = pickle.loads(u1_pickled)
# this fails unless the InstanceState
# compiles the mapper
eq_(str(u1), "User(name='ed')")
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)