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from sqlalchemy.ext import serializer
from sqlalchemy import testing
from sqlalchemy import Integer, String, ForeignKey, select, \
desc, func, util
from sqlalchemy.testing.schema import Table
from sqlalchemy.testing.schema import Column
from sqlalchemy.orm import relationship, sessionmaker, scoped_session, \
class_mapper, mapper, joinedload, configure_mappers, aliased
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class User(fixtures.ComparableEntity):
pass
class Address(fixtures.ComparableEntity):
pass
users = addresses = Session = None
class SerializeTest(fixtures.MappedTest):
run_setup_mappers = 'once'
run_inserts = 'once'
run_deletes = None
@classmethod
def define_tables(cls, metadata):
global users, addresses
users = Table('users', metadata, Column('id', Integer,
primary_key=True), Column('name', String(50)))
addresses = Table('addresses', metadata, Column('id', Integer,
primary_key=True), Column('email',
String(50)), Column('user_id', Integer,
ForeignKey('users.id')))
@classmethod
def setup_mappers(cls):
global Session
Session = scoped_session(sessionmaker())
mapper(User, users, properties={'addresses'
: relationship(Address, backref='user',
order_by=addresses.c.id)})
mapper(Address, addresses)
configure_mappers()
@classmethod
def insert_data(cls):
params = [dict(list(zip(('id', 'name'), column_values)))
for column_values in [(7, 'jack'), (8, 'ed'), (9,
'fred'), (10, 'chuck')]]
users.insert().execute(params)
addresses.insert().execute([dict(list(zip(('id', 'user_id', 'email'
), column_values)))
for column_values in [(1, 7,
'jack@bean.com'), (2, 8,
'ed@wood.com'), (3, 8,
'ed@bettyboop.com'), (4, 8,
'ed@lala.com'), (5, 9,
'fred@fred.com')]])
def test_tables(self):
assert serializer.loads(serializer.dumps(users, -1),
users.metadata, Session) is users
def test_columns(self):
assert serializer.loads(serializer.dumps(users.c.name, -1),
users.metadata, Session) is users.c.name
def test_mapper(self):
user_mapper = class_mapper(User)
assert serializer.loads(serializer.dumps(user_mapper, -1),
None, None) is user_mapper
def test_attribute(self):
assert serializer.loads(serializer.dumps(User.name, -1), None,
None) is User.name
@testing.requires.python26 # crashes in 2.5
def test_expression(self):
expr = \
select([users]).select_from(users.join(addresses)).limit(5)
re_expr = serializer.loads(serializer.dumps(expr, -1),
users.metadata, None)
eq_(str(expr), str(re_expr))
assert re_expr.bind is testing.db
eq_(re_expr.execute().fetchall(), [(7, 'jack'), (8, 'ed'),
(8, 'ed'), (8, 'ed'), (9, 'fred')])
def test_query_one(self):
q = Session.query(User).\
filter(User.name == 'ed').\
options(joinedload(User.addresses))
q2 = serializer.loads(
serializer.dumps(q, -1),
users.metadata, Session)
def go():
eq_(q2.all(), [
User(name='ed', addresses=[Address(id=2),
Address(id=3), Address(id=4)])])
self.assert_sql_count(testing.db, go, 1)
eq_(q2.join(User.addresses).filter(Address.email
== 'ed@bettyboop.com').value(func.count('*')), 1)
u1 = Session.query(User).get(8)
q = Session.query(Address).filter(Address.user
== u1).order_by(desc(Address.email))
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(q2.all(), [Address(email='ed@wood.com'),
Address(email='ed@lala.com'),
Address(email='ed@bettyboop.com')])
@testing.requires.non_broken_pickle
def test_query_two(self):
q = \
Session.query(User).join(User.addresses).\
filter(Address.email.like('%fred%'))
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(q2.all(), [User(name='fred')])
eq_(list(q2.values(User.id, User.name)), [(9, 'fred')])
@testing.requires.non_broken_pickle
@testing.skip_if(lambda: util.pypy, "pypy unsupported, fixed in 0.9")
def test_query_three(self):
ua = aliased(User)
q = \
Session.query(ua).join(ua.addresses).\
filter(Address.email.like('%fred%'))
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(q2.all(), [User(name='fred')])
# try to pull out the aliased entity here...
ua_2 = q2._entities[0].entity_zero.entity
eq_(list(q2.values(ua_2.id, ua_2.name)), [(9, 'fred')])
@testing.requires.non_broken_pickle
def test_orm_join(self):
from sqlalchemy.orm.util import join
j = join(User, Address, User.addresses)
j2 = serializer.loads(serializer.dumps(j, -1), users.metadata)
assert j2.left is j.left
assert j2.right is j.right
assert j2._target_adapter._next
@testing.requires.python26 # namedtuple workaround not serializable in 2.5
@testing.exclude('sqlite', '<=', (3, 5, 9),
'id comparison failing on the buildbot')
def test_aliases(self):
u7, u8, u9, u10 = Session.query(User).order_by(User.id).all()
ualias = aliased(User)
q = Session.query(User, ualias).join(ualias, User.id
< ualias.id).filter(User.id < 9).order_by(User.id,
ualias.id)
eq_(list(q.all()), [(u7, u8), (u7, u9), (u7, u10), (u8, u9),
(u8, u10)])
q2 = serializer.loads(serializer.dumps(q, -1), users.metadata,
Session)
eq_(list(q2.all()), [(u7, u8), (u7, u9), (u7, u10), (u8, u9),
(u8, u10)])
@testing.requires.non_broken_pickle
def test_any(self):
r = User.addresses.any(Address.email == 'x')
ser = serializer.dumps(r, -1)
x = serializer.loads(ser, users.metadata)
eq_(str(r), str(x))
if __name__ == '__main__':
testing.main()
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