mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-03 14:29:41 -04:00
Mike Bayer
be5d326343
and also addresses a significant chunk of py3k deprecations. It's mainly expicit __hash__ methods. Additionally, most usage of sets/dicts to store columns uses util-based placeholder names.
130 lines
4.7 KiB
Python
130 lines
4.7 KiB
Python
import testenv; testenv.configure_for_tests()
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from sqlalchemy.ext import serializer
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from sqlalchemy import exc
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from testlib import sa, testing
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from testlib.sa import MetaData, Table, Column, Integer, String, ForeignKey, select, desc, func, util
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from testlib.sa.orm import relation, sessionmaker, scoped_session, class_mapper, mapper, eagerload, compile_mappers, aliased
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from testlib.testing import eq_
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from orm._base import ComparableEntity, MappedTest
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class User(ComparableEntity):
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pass
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class Address(ComparableEntity):
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pass
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class SerializeTest(testing.ORMTest):
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keep_mappers = True
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keep_data = True
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def define_tables(self, metadata):
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global users, addresses
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users = Table('users', metadata,
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Column('id', Integer, primary_key=True),
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Column('name', String(50))
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)
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addresses = Table('addresses', metadata,
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Column('id', Integer, primary_key=True),
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Column('email', String(50)),
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Column('user_id', Integer, ForeignKey('users.id')),
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)
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def setup_mappers(self):
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global Session
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Session = scoped_session(sessionmaker())
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mapper(User, users, properties={
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'addresses':relation(Address, backref='user', order_by=addresses.c.id)
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})
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mapper(Address, addresses)
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compile_mappers()
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def insert_data(self):
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params = [dict(zip(('id', 'name'), column_values)) for column_values in
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[(7, 'jack'),
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(8, 'ed'),
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(9, 'fred'),
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(10, 'chuck')]
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]
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users.insert().execute(params)
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addresses.insert().execute(
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[dict(zip(('id', 'user_id', 'email'), column_values)) for column_values in
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[(1, 7, "jack@bean.com"),
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(2, 8, "ed@wood.com"),
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(3, 8, "ed@bettyboop.com"),
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(4, 8, "ed@lala.com"),
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(5, 9, "fred@fred.com")]
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]
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)
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def test_tables(self):
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assert serializer.loads(serializer.dumps(users), users.metadata, Session) is users
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def test_columns(self):
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assert serializer.loads(serializer.dumps(users.c.name), users.metadata, Session) is users.c.name
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def test_mapper(self):
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user_mapper = class_mapper(User)
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assert serializer.loads(serializer.dumps(user_mapper), None, None) is user_mapper
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def test_attribute(self):
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assert serializer.loads(serializer.dumps(User.name), None, None) is User.name
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def test_expression(self):
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expr = select([users]).select_from(users.join(addresses)).limit(5)
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re_expr = serializer.loads(serializer.dumps(expr), users.metadata, None)
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eq_(
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str(expr),
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str(re_expr)
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)
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assert re_expr.bind is testing.db
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eq_(
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re_expr.execute().fetchall(),
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[(7, u'jack'), (8, u'ed'), (8, u'ed'), (8, u'ed'), (9, u'fred')]
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)
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# fails due to pure Python pickle bug: http://bugs.python.org/issue998998
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@testing.fails_if(lambda: util.py3k)
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def test_query(self):
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q = Session.query(User).filter(User.name=='ed').options(eagerload(User.addresses))
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eq_(q.all(), [User(name='ed', addresses=[Address(id=2), Address(id=3), Address(id=4)])])
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q2 = serializer.loads(serializer.dumps(q), users.metadata, Session)
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def go():
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eq_(q2.all(), [User(name='ed', addresses=[Address(id=2), Address(id=3), Address(id=4)])])
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self.assert_sql_count(testing.db, go, 1)
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eq_(q2.join(User.addresses).filter(Address.email=='ed@bettyboop.com').value(func.count('*')), 1)
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u1 = Session.query(User).get(8)
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q = Session.query(Address).filter(Address.user==u1).order_by(desc(Address.email))
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q2 = serializer.loads(serializer.dumps(q), users.metadata, Session)
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eq_(q2.all(), [Address(email='ed@wood.com'), Address(email='ed@lala.com'), Address(email='ed@bettyboop.com')])
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q = Session.query(User).join(User.addresses).filter(Address.email.like('%fred%'))
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q2 = serializer.loads(serializer.dumps(q), users.metadata, Session)
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eq_(q2.all(), [User(name='fred')])
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eq_(list(q2.values(User.id, User.name)), [(9, u'fred')])
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def test_aliases(self):
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u7, u8, u9, u10 = Session.query(User).order_by(User.id).all()
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ualias = aliased(User)
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q = Session.query(User, ualias).join((ualias, User.id < ualias.id)).filter(User.id<9).order_by(User.id, ualias.id)
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q2 = serializer.loads(serializer.dumps(q), users.metadata, Session)
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eq_(list(q2.all()), [(u7, u8), (u7, u9), (u7, u10), (u8, u9), (u8, u10)])
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if __name__ == '__main__':
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testing.main()
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