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sqlalchemy-1418 / test / orm / test_mapper.py

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"""General mapper operations with an emphasis on selecting/loading."""

from test.lib.testing import assert_raises, assert_raises_message
import sqlalchemy as sa
from test.lib import testing
from sqlalchemy import MetaData, Integer, String, ForeignKey, func, util
from test.lib.schema import Table, Column
from sqlalchemy.engine import default
from sqlalchemy.orm import mapper, relationship, backref, \
    create_session, class_mapper, configure_mappers, reconstructor, \
    validates, aliased, deferred, synonym, attributes, \
    column_property, composite, dynamic_loader, \
    comparable_property, Session
from sqlalchemy.orm.persistence import _sort_states
from test.lib.testing import eq_, AssertsCompiledSQL
from test.lib import fixtures
from test.orm import _fixtures
from test.lib.assertsql import CompiledSQL
import logging

class MapperTest(_fixtures.FixtureTest, AssertsCompiledSQL):
    __dialect__ = 'default'

    def test_prop_shadow(self):
        """A backref name may not shadow an existing property name."""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)


        mapper(Address, addresses)
        mapper(User, users,
            properties={
            'addresses':relationship(Address, backref='email_address')
        })
        assert_raises(sa.exc.ArgumentError, sa.orm.configure_mappers)

    def test_update_attr_keys(self):
        """test that update()/insert() use the correct key when given InstrumentedAttributes."""

        User, users = self.classes.User, self.tables.users


        mapper(User, users, properties={
            'foobar':users.c.name
        })

        users.insert().values({User.foobar:'name1'}).execute()
        eq_(sa.select([User.foobar]).where(User.foobar=='name1').execute().fetchall(), [('name1',)])

        users.update().values({User.foobar:User.foobar + 'foo'}).execute()
        eq_(sa.select([User.foobar]).where(User.foobar=='name1foo').execute().fetchall(), [('name1foo',)])

    def test_utils(self):
        users = self.tables.users

        from sqlalchemy.orm.util import _is_mapped_class, _is_aliased_class

        class Foo(object):
            x = "something"
            @property
            def y(self):
                return "somethign else"
        m = mapper(Foo, users)
        a1 = aliased(Foo)

        f = Foo()

        for fn, arg, ret in [
            (_is_mapped_class, Foo.x, False),
            (_is_mapped_class, Foo.y, False),
            (_is_mapped_class, Foo, True),
            (_is_mapped_class, f, False),
            (_is_mapped_class, a1, True),
            (_is_mapped_class, m, True),
            (_is_aliased_class, a1, True),
            (_is_aliased_class, Foo.x, False),
            (_is_aliased_class, Foo.y, False),
            (_is_aliased_class, Foo, False),
            (_is_aliased_class, f, False),
            (_is_aliased_class, a1, True),
            (_is_aliased_class, m, False),
        ]:
            assert fn(arg) == ret



    def test_prop_accessor(self):
        users, User = self.tables.users, self.classes.User

        mapper(User, users)
        assert_raises(NotImplementedError,
                          getattr, sa.orm.class_mapper(User), 'properties')


    def test_friendly_attribute_str_on_uncompiled_boom(self):
        User, users = self.classes.User, self.tables.users

        def boom():
            raise Exception("it broke")
        mapper(User, users, properties={
            'addresses':relationship(boom)
        })

        # test that QueryableAttribute.__str__() doesn't 
        # cause a compile.
        eq_(str(User.addresses), "User.addresses")

    def test_exceptions_sticky(self):
        """test preservation of mapper compile errors raised during hasattr(),
        as well as for redundant mapper compile calls.  Test that 
        repeated calls don't stack up error messages.

        """

        Address, addresses, User = (self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)


        mapper(Address, addresses, properties={
            'user':relationship(User)
        })

        try:
            hasattr(Address.user, 'property')
        except sa.orm.exc.UnmappedClassError:
            assert util.compat.py32

        for i in range(3):
            assert_raises_message(sa.exc.InvalidRequestError,
                                  "^One or more mappers failed to "
                                  "initialize - can't proceed with "
                                  "initialization of other mappers.  "
                                  "Original exception was: Class "
                                  "'test.orm._fixtures.User' is not mapped$"
                                  , configure_mappers)

    def test_column_prefix(self):
        users, User = self.tables.users, self.classes.User

        mapper(User, users, column_prefix='_', properties={
            'user_name': synonym('_name')
        })

        s = create_session()
        u = s.query(User).get(7)
        eq_(u._name, 'jack')
        eq_(u._id,7)
        u2 = s.query(User).filter_by(user_name='jack').one()
        assert u is u2

    def test_no_pks_1(self):
        User, users = self.classes.User, self.tables.users

        s = sa.select([users.c.name]).alias('foo')
        assert_raises(sa.exc.ArgumentError, mapper, User, s)

    def test_no_pks_2(self):
        User, users = self.classes.User, self.tables.users

        s = sa.select([users.c.name]).alias()
        assert_raises(sa.exc.ArgumentError, mapper, User, s)

    def test_reconfigure_on_other_mapper(self):
        """A configure trigger on an already-configured mapper 
        still triggers a check against all mappers."""

        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        mapper(User, users)
        sa.orm.configure_mappers()
        assert sa.orm.mapperlib._new_mappers is False

        m = mapper(Address, addresses, properties={
                'user': relationship(User, backref="addresses")})

        assert m.configured is False
        assert sa.orm.mapperlib._new_mappers is True
        u = User()
        assert User.addresses
        assert sa.orm.mapperlib._new_mappers is False

    def test_configure_on_session(self):
        User, users = self.classes.User, self.tables.users

        m = mapper(User, users)
        session = create_session()
        session.connection(m)

    def test_incomplete_columns(self):
        """Loading from a select which does not contain all columns"""

        addresses, Address = self.tables.addresses, self.classes.Address

        mapper(Address, addresses)
        s = create_session()
        a = s.query(Address).from_statement(
            sa.select([addresses.c.id, addresses.c.user_id])).first()
        eq_(a.user_id, 7)
        eq_(a.id, 1)
        # email address auto-defers
        assert 'email_addres' not in a.__dict__
        eq_(a.email_address, 'jack@bean.com')

    def test_column_not_present(self):
        users, addresses, User = (self.tables.users,
                                self.tables.addresses,
                                self.classes.User)

        assert_raises_message(sa.exc.ArgumentError,
                              "not represented in the mapper's table",
                              mapper, User, users, properties={'foo'
                              : addresses.c.user_id})

    def test_constructor_exc(self):
        """TypeError is raised for illegal constructor args, 
        whether or not explicit __init__ is present [ticket:908]."""

        users, addresses = self.tables.users, self.tables.addresses


        class Foo(object):
            def __init__(self):
                pass
        class Bar(object):
            pass

        mapper(Foo, users)
        mapper(Bar, addresses)
        assert_raises(TypeError, Foo, x=5)
        assert_raises(TypeError, Bar, x=5)

    def test_sort_states_comparisons(self):
        """test that _sort_states() doesn't compare 
        insert_order to state.key, for set of mixed
        persistent/pending.  In particular Python 3 disallows
        this.

        """
        class Foo(object):
            def __init__(self, id):
                self.id = id
        m = MetaData()
        foo_t = Table('foo', m, 
                        Column('id', String, primary_key=True)
                    )
        m = mapper(Foo, foo_t)
        class DontCompareMeToString(int):
        # Py3K
        #    pass
        # Py2K
            def __lt__(self, other):
                assert not isinstance(other, basestring)
                return int(self) < other
        # end Py2K
        foos = [Foo(id='f%d' % i) for i in range(5)]
        states = [attributes.instance_state(f) for f in foos]

        for s in states[0:3]:
            s.key = m._identity_key_from_state(s)
        states[3].insert_order = DontCompareMeToString(5)
        states[4].insert_order = DontCompareMeToString(1)
        states[2].insert_order = DontCompareMeToString(3)
        eq_(
            _sort_states(states),
            [states[4], states[3], states[0], states[1], states[2]]
        )


    def test_props(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        m = mapper(User, users, properties = {
            'addresses' : relationship(mapper(Address, addresses))
        })
        assert User.addresses.property is m.get_property('addresses')

    def test_configure_on_prop_1(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        mapper(User, users, properties = {
            'addresses' : relationship(mapper(Address, addresses))
        })
        User.addresses.any(Address.email_address=='foo@bar.com')

    def test_configure_on_prop_2(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        mapper(User, users, properties = {
            'addresses' : relationship(mapper(Address, addresses))
        })
        eq_(str(User.id == 3), str(users.c.id==3))

    def test_configure_on_prop_3(self):
        users, addresses, User = (self.tables.users,
                                self.tables.addresses,
                                self.classes.User)

        class Foo(User):pass
        mapper(User, users)
        mapper(Foo, addresses, inherits=User)
        assert getattr(Foo().__class__, 'name').impl is not None

    def test_deferred_subclass_attribute_instrument(self):
        users, addresses, User = (self.tables.users,
                                self.tables.addresses,
                                self.classes.User)

        class Foo(User):pass
        mapper(User, users)
        configure_mappers()
        mapper(Foo, addresses, inherits=User)
        assert getattr(Foo().__class__, 'name').impl is not None

    def test_check_descriptor_as_method(self):
        User, users = self.classes.User, self.tables.users

        m = mapper(User, users)
        class MyClass(User):
            def foo(self):
                pass
        m._is_userland_descriptor(MyClass.foo)

    def test_configure_on_get_props_1(self):
        User, users = self.classes.User, self.tables.users

        m =mapper(User, users)
        assert not m.configured
        assert list(m.iterate_properties)
        assert m.configured

    def test_configure_on_get_props_2(self):
        User, users = self.classes.User, self.tables.users

        m= mapper(User, users)
        assert not m.configured
        assert m.get_property('name')
        assert m.configured

    def test_configure_on_get_props_3(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        m= mapper(User, users)
        assert not m.configured
        configure_mappers()

        m2 = mapper(Address, addresses, properties={
                                            'user':relationship(User, backref='addresses')
                                        })
        assert m.get_property('addresses')

    def test_add_property(self):
        users, addresses, Address = (self.tables.users,
                                self.tables.addresses,
                                self.classes.Address)

        assert_col = []

        class User(fixtures.ComparableEntity):
            def _get_name(self):
                assert_col.append(('get', self._name))
                return self._name
            def _set_name(self, name):
                assert_col.append(('set', name))
                self._name = name
            name = property(_get_name, _set_name)

            def _uc_name(self):
                if self._name is None:
                    return None
                return self._name.upper()
            uc_name = property(_uc_name)
            uc_name2 = property(_uc_name)

        m = mapper(User, users)
        mapper(Address, addresses)

        class UCComparator(sa.orm.PropComparator):
            __hash__ = None

            def __eq__(self, other):
                cls = self.prop.parent.class_
                col = getattr(cls, 'name')
                if other is None:
                    return col == None
                else:
                    return sa.func.upper(col) == sa.func.upper(other)

        m.add_property('_name', deferred(users.c.name))
        m.add_property('name', synonym('_name'))
        m.add_property('addresses', relationship(Address))
        m.add_property('uc_name', sa.orm.comparable_property(UCComparator))
        m.add_property('uc_name2', sa.orm.comparable_property(
                UCComparator, User.uc_name2))

        sess = create_session(autocommit=False)
        assert sess.query(User).get(7)

        u = sess.query(User).filter_by(name='jack').one()

        def go():
            eq_(len(u.addresses),
                len(self.static.user_address_result[0].addresses))
            eq_(u.name, 'jack')
            eq_(u.uc_name, 'JACK')
            eq_(u.uc_name2, 'JACK')
            eq_(assert_col, [('get', 'jack')], str(assert_col))
        self.sql_count_(2, go)

        u.name = 'ed'
        u3 = User()
        u3.name = 'some user'
        sess.add(u3)
        sess.flush()
        sess.rollback()

    def test_add_prop_via_backref_resets_memoizations_reconfigures(self):
        users, User = self.tables.users, self.classes.User
        addresses, Address = self.tables.addresses, self.classes.Address

        m1 = mapper(User, users)
        User()

        m2 = mapper(Address, addresses, properties={
            'user':relationship(User, backref="addresses")
        })
        # configure mappers takes place when User is generated
        User()
        assert hasattr(User, 'addresses')
        assert "addresses" in [p.key for p in m1._polymorphic_properties]

    def test_replace_property(self):
        users, User = self.tables.users, self.classes.User

        m = mapper(User, users)
        m.add_property('_name',users.c.name)
        m.add_property('name', synonym('_name'))

        sess = create_session()
        u = sess.query(User).filter_by(name='jack').one()
        eq_(u._name, 'jack')
        eq_(u.name, 'jack')
        u.name = 'jacko'
        assert m._columntoproperty[users.c.name] is m.get_property('_name')

        sa.orm.clear_mappers()

        m = mapper(User, users)
        m.add_property('name', synonym('_name', map_column=True))

        sess.expunge_all()
        u = sess.query(User).filter_by(name='jack').one()
        eq_(u._name, 'jack')
        eq_(u.name, 'jack')
        u.name = 'jacko'
        assert m._columntoproperty[users.c.name] is m.get_property('_name')

    def test_add_column_prop_deannotate(self):
        User, users = self.classes.User, self.tables.users
        Address, addresses = self.classes.Address, self.tables.addresses
        class SubUser(User):
            pass
        m = mapper(User, users)
        m2 = mapper(SubUser, addresses, inherits=User)
        m3 = mapper(Address, addresses, properties={
            'foo':relationship(m2)
        })
        # add property using annotated User.name,
        # needs to be deannotated
        m.add_property("x", column_property(User.name + "name"))
        s = create_session()
        q = s.query(m2).select_from(Address).join(Address.foo)
        self.assert_compile(
            q,
            "SELECT "
            "anon_1.addresses_id AS anon_1_addresses_id, "
            "anon_1.users_id AS anon_1_users_id, "
            "anon_1.users_name AS anon_1_users_name, "
            "anon_1.addresses_user_id AS anon_1_addresses_user_id, "
            "anon_1.addresses_email_address AS "
            "anon_1_addresses_email_address, "
            "anon_1.users_name || :name_1 AS anon_2 "
            "FROM addresses JOIN (SELECT users.id AS users_id, "
            "users.name AS users_name, addresses.id AS addresses_id, "
            "addresses.user_id AS addresses_user_id, "
            "addresses.email_address AS addresses_email_address "
            "FROM users JOIN addresses ON users.id = "
            "addresses.user_id) AS anon_1 ON "
            "anon_1.users_id = addresses.user_id"
        )

    def test_column_prop_deannotate(self):
        """test that column property deannotates, 
        bringing expressions down to the original mapped columns.
        """
        User, users = self.classes.User, self.tables.users
        m = mapper(User, users)
        assert User.id.property.columns[0] is users.c.id
        assert User.name.property.columns[0] is users.c.name
        expr = User.name + "name"
        expr2 = sa.select([User.name, users.c.id])
        m.add_property("x", column_property(expr))
        m.add_property("y", column_property(expr2))

        assert User.x.property.columns[0] is not expr
        assert User.x.property.columns[0].element.left is users.c.name
        assert User.x.property.columns[0].element.right is not expr.right

        assert User.y.property.columns[0] is not expr2
        assert User.y.property.columns[0].element.\
                    _raw_columns[0] is users.c.name
        assert User.y.property.columns[0].element.\
                    _raw_columns[1] is users.c.id

    def test_synonym_replaces_backref(self):
        addresses, users, User = (self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        assert_calls = []
        class Address(object):
            def _get_user(self):
                assert_calls.append("get")
                return self._user
            def _set_user(self, user):
                assert_calls.append("set")
                self._user = user
            user = property(_get_user, _set_user)

        # synonym is created against nonexistent prop
        mapper(Address, addresses, properties={
            'user':synonym('_user')
        })
        sa.orm.configure_mappers()

        # later, backref sets up the prop
        mapper(User, users, properties={
            'addresses':relationship(Address, backref='_user')
        })

        sess = create_session()
        u1 = sess.query(User).get(7)
        u2 = sess.query(User).get(8)
        # comparaison ops need to work
        a1 = sess.query(Address).filter(Address.user==u1).one()
        eq_(a1.id, 1)
        a1.user = u2
        assert a1.user is u2
        eq_(assert_calls, ["set", "get"])

    def test_self_ref_synonym(self):
        t = Table('nodes', MetaData(),
            Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
            Column('parent_id', Integer, ForeignKey('nodes.id')))

        class Node(object):
            pass

        mapper(Node, t, properties={
            '_children':relationship(Node, backref=backref('_parent', remote_side=t.c.id)),
            'children':synonym('_children'),
            'parent':synonym('_parent')
        })

        n1 = Node()
        n2 = Node()
        n1.children.append(n2)
        assert n2.parent is n2._parent is n1
        assert n1.children[0] is n1._children[0] is n2
        eq_(str(Node.parent == n2), ":param_1 = nodes.parent_id")

    def test_non_primary_identity_class(self):
        User = self.classes.User
        users, addresses = self.tables.users, self.tables.addresses
        class AddressUser(User):
            pass
        m1 = mapper(User, users, polymorphic_identity='user')
        m2 = mapper(AddressUser, addresses, inherits=User, 
                        polymorphic_identity='address')
        m3 = mapper(AddressUser, addresses, non_primary=True)
        assert m3._identity_class is m2._identity_class
        eq_(
            m2.identity_key_from_instance(AddressUser()),
            m3.identity_key_from_instance(AddressUser())
        )



    def test_illegal_non_primary(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        mapper(User, users)
        mapper(Address, addresses)
        mapper(User, users, non_primary=True, properties={
            'addresses':relationship(Address)
        })
        assert_raises_message(
            sa.exc.ArgumentError,
            "Attempting to assign a new relationship 'addresses' "
            "to a non-primary mapper on class 'User'",
            configure_mappers
        )

    def test_illegal_non_primary_2(self):
        User, users = self.classes.User, self.tables.users

        assert_raises_message(
            sa.exc.InvalidRequestError,
            "Configure a primary mapper first",
            mapper, User, users, non_primary=True)

    def test_illegal_non_primary_3(self):
        users, addresses = self.tables.users, self.tables.addresses

        class Base(object):
            pass
        class Sub(Base):
            pass
        mapper(Base, users)
        assert_raises_message(sa.exc.InvalidRequestError, 
                "Configure a primary mapper first",
                mapper, Sub, addresses, non_primary=True
            )

    def test_prop_filters(self):
        t = Table('person', MetaData(),
                  Column('id', Integer, primary_key=True,
                                        test_needs_autoincrement=True),
                  Column('type', String(128)),
                  Column('name', String(128)),
                  Column('employee_number', Integer),
                  Column('boss_id', Integer, ForeignKey('person.id')),
                  Column('vendor_id', Integer))

        class Person(object): pass
        class Vendor(Person): pass
        class Employee(Person): pass
        class Manager(Employee): pass
        class Hoho(object): pass
        class Lala(object): pass
        class Fub(object):pass
        class Frob(object):pass
        class HasDef(object):
            def name(self):
                pass
        class Empty(object):pass

        empty = mapper(Empty, t, properties={'empty_id' : t.c.id}, 
                       include_properties=[])
        p_m = mapper(Person, t, polymorphic_on=t.c.type,
                     include_properties=('id', 'type', 'name'))
        e_m = mapper(Employee, inherits=p_m,
                     polymorphic_identity='employee', properties={'boss'
                     : relationship(Manager, backref=backref('peon'),
                     remote_side=t.c.id)},
                     exclude_properties=('vendor_id', ))

        m_m = mapper(Manager, inherits=e_m, polymorphic_identity='manager',
                     include_properties=('id', 'type'))

        v_m = mapper(Vendor, inherits=p_m, polymorphic_identity='vendor',
                     exclude_properties=('boss_id', 'employee_number'))
        h_m = mapper(Hoho, t, include_properties=('id', 'type', 'name'))
        l_m = mapper(Lala, t, exclude_properties=('vendor_id', 'boss_id'),
                     column_prefix="p_")

        hd_m = mapper(HasDef, t, column_prefix="h_")

        fb_m = mapper(Fub, t, include_properties=(t.c.id, t.c.type))
        frb_m = mapper(Frob, t, column_prefix='f_',
                       exclude_properties=(t.c.boss_id,
                       'employee_number', t.c.vendor_id))

        configure_mappers()

        def assert_props(cls, want):
            have = set([n for n in dir(cls) if not n.startswith('_')])
            want = set(want)
            eq_(have, want)

        def assert_instrumented(cls, want):
            have = set([p.key for p in class_mapper(cls).iterate_properties])
            want = set(want)
            eq_(have, want)

        assert_props(HasDef, ['h_boss_id', 'h_employee_number', 'h_id', 
                                'name', 'h_name', 'h_vendor_id', 'h_type'])
        assert_props(Person, ['id', 'name', 'type'])
        assert_instrumented(Person, ['id', 'name', 'type'])
        assert_props(Employee, ['boss', 'boss_id', 'employee_number',
                                'id', 'name', 'type'])
        assert_instrumented(Employee,['boss', 'boss_id', 'employee_number',
                                                        'id', 'name', 'type'])
        assert_props(Manager, ['boss', 'boss_id', 'employee_number', 'peon',
                               'id', 'name', 'type'])

        # 'peon' and 'type' are both explicitly stated properties
        assert_instrumented(Manager, ['peon', 'type', 'id'])

        assert_props(Vendor, ['vendor_id', 'id', 'name', 'type'])
        assert_props(Hoho, ['id', 'name', 'type'])
        assert_props(Lala, ['p_employee_number', 'p_id', 'p_name', 'p_type'])
        assert_props(Fub, ['id', 'type'])
        assert_props(Frob, ['f_id', 'f_type', 'f_name', ])


        # putting the discriminator column in exclude_properties, 
        # very weird.  As of 0.7.4 this re-maps it.
        class Foo(Person):
            pass
        assert_props(Empty, ['empty_id'])

        mapper(
            Foo, inherits=Person, polymorphic_identity='foo',
            exclude_properties=('type', ),
        )
        assert hasattr(Foo, "type")
        assert Foo.type.property.columns[0] is t.c.type

    @testing.provide_metadata
    def test_prop_filters_defaults(self):
        metadata = self.metadata
        t = Table('t', metadata,
               Column('id', Integer(), primary_key=True, test_needs_autoincrement=True),
               Column('x', Integer(), nullable=False, server_default='0')
              )
        t.create()
        class A(object):
            pass
        mapper(A, t, include_properties=['id'])
        s = Session()
        s.add(A())
        s.commit()

    def test_we_dont_call_bool(self):
        class NoBoolAllowed(object):
            def __nonzero__(self):
                raise Exception("nope")
        mapper(NoBoolAllowed, self.tables.users)
        u1 = NoBoolAllowed()
        u1.name = "some name"
        s = Session(testing.db)
        s.add(u1)
        s.commit()
        assert s.query(NoBoolAllowed).get(u1.id) is u1

    def test_we_dont_call_eq(self):
        class NoEqAllowed(object):
            def __eq__(self, other):
                raise Exception("nope")

        addresses, users = self.tables.addresses, self.tables.users
        Address = self.classes.Address

        mapper(NoEqAllowed, users, properties={
            'addresses':relationship(Address, backref='user')
        })
        mapper(Address, addresses)

        u1 = NoEqAllowed()
        u1.name = "some name"
        u1.addresses = [Address(id=12, email_address='a1')]
        s = Session(testing.db)
        s.add(u1)
        s.commit()

        a1 = s.query(Address).filter_by(id=12).one()
        assert a1.user is u1

    def test_mapping_to_join_raises(self):
        """Test implicit merging of two cols raises."""

        addresses, users, User = (self.tables.addresses,
                                self.tables.users,
                                self.classes.User)


        usersaddresses = sa.join(users, addresses,
                                 users.c.id == addresses.c.user_id)
        assert_raises_message(
            sa.exc.InvalidRequestError,
            "Implicitly",
            mapper, User, usersaddresses, primary_key=[users.c.id]
        )

    def test_mapping_to_join_explicit_prop(self):
        """Mapping to a join"""

        User, addresses, users = (self.classes.User,
                                self.tables.addresses,
                                self.tables.users)


        usersaddresses = sa.join(users, addresses, users.c.id
                                 == addresses.c.user_id)
        mapper(User, usersaddresses, primary_key=[users.c.id],
               properties={'add_id':addresses.c.id}
               )
        l = create_session().query(User).order_by(users.c.id).all()
        eq_(l, self.static.user_result[:3])

    def test_mapping_to_join_exclude_prop(self):
        """Mapping to a join"""

        User, addresses, users = (self.classes.User,
                                self.tables.addresses,
                                self.tables.users)


        usersaddresses = sa.join(users, addresses, users.c.id
                                 == addresses.c.user_id)
        mapper(User, usersaddresses, primary_key=[users.c.id],
               exclude_properties=[addresses.c.id]
               )
        l = create_session().query(User).order_by(users.c.id).all()
        eq_(l, self.static.user_result[:3])

    def test_mapping_to_join_no_pk(self):
        email_bounces, addresses, Address = (self.tables.email_bounces,
                                self.tables.addresses,
                                self.classes.Address)

        m = mapper(Address, 
                    addresses.join(email_bounces), 
                    properties={'id':[addresses.c.id, email_bounces.c.id]}
                )
        configure_mappers()
        assert addresses in m._pks_by_table
        assert email_bounces not in m._pks_by_table

        sess = create_session()
        a = Address(id=10, email_address='e1')
        sess.add(a)
        sess.flush()

        eq_(addresses.count().scalar(), 6)
        eq_(email_bounces.count().scalar(), 5)

    def test_mapping_to_outerjoin(self):
        """Mapping to an outer join with a nullable composite primary key."""

        users, addresses, User = (self.tables.users,
                                self.tables.addresses,
                                self.classes.User)



        mapper(User, users.outerjoin(addresses),
               primary_key=[users.c.id, addresses.c.id],
               properties=dict(
            address_id=addresses.c.id))

        session = create_session()
        l = session.query(User).order_by(User.id, User.address_id).all()

        eq_(l, [
            User(id=7, address_id=1),
            User(id=8, address_id=2),
            User(id=8, address_id=3),
            User(id=8, address_id=4),
            User(id=9, address_id=5),
            User(id=10, address_id=None)])

    def test_mapping_to_outerjoin_no_partial_pks(self):
        """test the allow_partial_pks=False flag."""

        users, addresses, User = (self.tables.users,
                                self.tables.addresses,
                                self.classes.User)



        mapper(User, users.outerjoin(addresses),
                allow_partial_pks=False,
               primary_key=[users.c.id, addresses.c.id],
               properties=dict(
            address_id=addresses.c.id))

        session = create_session()
        l = session.query(User).order_by(User.id, User.address_id).all()

        eq_(l, [
            User(id=7, address_id=1),
            User(id=8, address_id=2),
            User(id=8, address_id=3),
            User(id=8, address_id=4),
            User(id=9, address_id=5),
            None])

    def test_scalar_pk_arg(self):
        users, Keyword, items, Item, User, keywords = (self.tables.users,
                                self.classes.Keyword,
                                self.tables.items,
                                self.classes.Item,
                                self.classes.User,
                                self.tables.keywords)

        m1 = mapper(Item, items, primary_key=[items.c.id])
        m2 = mapper(Keyword, keywords, primary_key=keywords.c.id)
        m3 = mapper(User, users, primary_key=(users.c.id,))

        assert m1.primary_key[0] is items.c.id
        assert m2.primary_key[0] is keywords.c.id
        assert m3.primary_key[0] is users.c.id


    def test_custom_join(self):
        """select_from totally replace the FROM parameters."""

        users, items, order_items, orders, Item, User, Order = (self.tables.users,
                                self.tables.items,
                                self.tables.order_items,
                                self.tables.orders,
                                self.classes.Item,
                                self.classes.User,
                                self.classes.Order)


        mapper(Item, items)

        mapper(Order, orders, properties=dict(
            items=relationship(Item, order_items)))

        mapper(User, users, properties=dict(
            orders=relationship(Order)))

        session = create_session()
        l = (session.query(User).
             select_from(users.join(orders).
                         join(order_items).
                         join(items)).
             filter(items.c.description == 'item 4')).all()

        eq_(l, [self.static.user_result[0]])

    def test_cancel_order_by(self):
        users, User = self.tables.users, self.classes.User

        mapper(User, users, order_by=users.c.name.desc())

        assert "order by users.name desc" in str(create_session().query(User).statement).lower()
        assert "order by" not in str(create_session().query(User).order_by(None).statement).lower()
        assert "order by users.name asc" in str(create_session().query(User).order_by(User.name.asc()).statement).lower()

        eq_(
            create_session().query(User).all(),
            [User(id=7, name=u'jack'), User(id=9, name=u'fred'), User(id=8, name=u'ed'), User(id=10, name=u'chuck')]
        )

        eq_(
            create_session().query(User).order_by(User.name).all(),
            [User(id=10, name=u'chuck'), User(id=8, name=u'ed'), User(id=9, name=u'fred'), User(id=7, name=u'jack')]
        )

    # 'Raises a "expression evaluation not supported" error at prepare time
    @testing.fails_on('firebird', 'FIXME: unknown')
    def test_function(self):
        """Mapping to a SELECT statement that has functions in it."""

        addresses, users, User = (self.tables.addresses,
                                self.tables.users,
                                self.classes.User)


        s = sa.select([users,
                       (users.c.id * 2).label('concat'),
                       sa.func.count(addresses.c.id).label('count')],
                      users.c.id == addresses.c.user_id,
                      group_by=[c for c in users.c]).alias('myselect')

        mapper(User, s, order_by=s.c.id)
        sess = create_session()
        l = sess.query(User).all()

        for idx, total in enumerate((14, 16)):
            eq_(l[idx].concat, l[idx].id * 2)
            eq_(l[idx].concat, total)

    def test_count(self):
        """The count function on Query."""

        User, users = self.classes.User, self.tables.users


        mapper(User, users)

        session = create_session()
        q = session.query(User)

        eq_(q.count(), 4)
        eq_(q.filter(User.id.in_([8,9])).count(), 2)
        eq_(q.filter(users.c.id.in_([8,9])).count(), 2)

        eq_(session.query(User.id).count(), 4)
        eq_(session.query(User.id).filter(User.id.in_((8, 9))).count(), 2)

    def test_many_to_many_count(self):
        keywords, items, item_keywords, Keyword, Item = (self.tables.keywords,
                                self.tables.items,
                                self.tables.item_keywords,
                                self.classes.Keyword,
                                self.classes.Item)

        mapper(Keyword, keywords)
        mapper(Item, items, properties=dict(
            keywords = relationship(Keyword, item_keywords, lazy='select')))

        session = create_session()
        q = (session.query(Item).
             join('keywords').
             distinct().
             filter(Keyword.name == "red"))
        eq_(q.count(), 2)

    def test_override_1(self):
        """Overriding a column raises an error."""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        def go():
            mapper(User, users,
                   properties=dict(
                       name=relationship(mapper(Address, addresses))))

        assert_raises(sa.exc.ArgumentError, go)

    def test_override_2(self):
        """exclude_properties cancels the error."""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)


        mapper(User, users,
               exclude_properties=['name'],
               properties=dict(
                   name=relationship(mapper(Address, addresses))))

        assert bool(User.name)

    def test_override_3(self):
        """The column being named elsewhere also cancels the error,"""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users,
               properties=dict(
                   name=relationship(mapper(Address, addresses)),
                   foo=users.c.name))

    def test_synonym(self):
        users, addresses, Address = (self.tables.users,
                                self.tables.addresses,
                                self.classes.Address)


        assert_col = []
        class extendedproperty(property):
            attribute = 123
            def __getitem__(self, key):
                return 'value'

        class User(object):
            def _get_name(self):
                assert_col.append(('get', self.name))
                return self.name
            def _set_name(self, name):
                assert_col.append(('set', name))
                self.name = name
            uname = extendedproperty(_get_name, _set_name)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='select'),
            uname = synonym('name'),
            adlist = synonym('addresses'),
            adname = synonym('addresses')
        ))

        # ensure the synonym can get at the proxied comparators without
        # an explicit compile
        User.name == 'ed'
        User.adname.any()

        assert hasattr(User, 'adlist')
        # as of 0.4.2, synonyms always create a property
        assert hasattr(User, 'adname')

        # test compile
        assert not isinstance(User.uname == 'jack', bool)

        assert User.uname.property
        assert User.adlist.property

        sess = create_session()

        # test RowTuple names
        row = sess.query(User.id, User.uname).first()
        assert row.uname == row[1]

        u = sess.query(User).filter(User.uname=='jack').one()

        fixture = self.static.user_address_result[0].addresses
        eq_(u.adlist, fixture)

        addr = sess.query(Address).filter_by(id=fixture[0].id).one()
        u = sess.query(User).filter(User.adname.contains(addr)).one()
        u2 = sess.query(User).filter(User.adlist.contains(addr)).one()

        assert u is u2

        assert u not in sess.dirty
        u.uname = "some user name"
        assert len(assert_col) > 0
        eq_(assert_col, [('set', 'some user name')])
        eq_(u.uname, "some user name")
        eq_(assert_col, [('set', 'some user name'), ('get', 'some user name')])
        eq_(u.name, "some user name")
        assert u in sess.dirty

        eq_(User.uname.attribute, 123)
        eq_(User.uname['key'], 'value')

    def test_synonym_of_synonym(self):
        users,  User = (self.tables.users,
                                self.classes.User)

        mapper(User, users, properties={
            'x':synonym('id'),
            'y':synonym('x')
        })

        s = Session()
        u = s.query(User).filter(User.y==8).one()
        eq_(u.y, 8)


    def test_synonym_column_location(self):
        users, User = self.tables.users, self.classes.User

        def go():
            mapper(User, users, properties={
                'not_name':synonym('_name', map_column=True)})

        assert_raises_message(
            sa.exc.ArgumentError,
            ("Can't compile synonym '_name': no column on table "
             "'users' named 'not_name'"),
            go)

    def test_column_synonyms(self):
        """Synonyms which automatically instrument properties, set up aliased column, etc."""

        addresses, users, Address = (self.tables.addresses,
                                self.tables.users,
                                self.classes.Address)



        assert_col = []
        class User(object):
            def _get_name(self):
                assert_col.append(('get', self._name))
                return self._name
            def _set_name(self, name):
                assert_col.append(('set', name))
                self._name = name
            name = property(_get_name, _set_name)

        mapper(Address, addresses)
        mapper(User, users, properties = {
            'addresses':relationship(Address, lazy='select'),
            'name':synonym('_name', map_column=True)
        })

        # test compile
        assert not isinstance(User.name == 'jack', bool)

        assert hasattr(User, 'name')
        assert hasattr(User, '_name')

        sess = create_session()
        u = sess.query(User).filter(User.name == 'jack').one()
        eq_(u.name, 'jack')
        u.name = 'foo'
        eq_(u.name, 'foo')
        eq_(assert_col, [('get', 'jack'), ('set', 'foo'), ('get', 'foo')])

    def test_synonym_map_column_conflict(self):
        users, User = self.tables.users, self.classes.User

        assert_raises(
            sa.exc.ArgumentError,
            mapper,
            User, users, properties=util.OrderedDict([
                ('_user_id', users.c.id),
                ('id', synonym('_user_id', map_column=True)),
            ])
        )

        assert_raises(
            sa.exc.ArgumentError,
            mapper,
            User, users, properties=util.OrderedDict([
                ('id', synonym('_user_id', map_column=True)),
                ('_user_id', users.c.id),
            ])
        )

    def test_comparable(self):
        users = self.tables.users

        class extendedproperty(property):
            attribute = 123

            def method1(self):
                return "method1"

            def __getitem__(self, key):
                return 'value'

        class UCComparator(sa.orm.PropComparator):
            __hash__ = None

            def method1(self):
                return "uccmethod1"

            def method2(self, other):
                return "method2"

            def __eq__(self, other):
                cls = self.prop.parent.class_
                col = getattr(cls, 'name')
                if other is None:
                    return col == None
                else:
                    return sa.func.upper(col) == sa.func.upper(other)

        def map_(with_explicit_property):
            class User(object):
                @extendedproperty
                def uc_name(self):
                    if self.name is None:
                        return None
                    return self.name.upper()
            if with_explicit_property:
                args = (UCComparator, User.uc_name)
            else:
                args = (UCComparator,)
            mapper(User, users, properties=dict(
                    uc_name = sa.orm.comparable_property(*args)))
            return User

        for User in (map_(True), map_(False)):
            sess = create_session()
            sess.begin()
            q = sess.query(User)

            assert hasattr(User, 'name')
            assert hasattr(User, 'uc_name')

            eq_(User.uc_name.method1(), "method1")
            eq_(User.uc_name.method2('x'), "method2")

            assert_raises_message(
                AttributeError, 
                "Neither 'extendedproperty' object nor 'UCComparator' object has an attribute 'nonexistent'", 
                getattr, User.uc_name, 'nonexistent')

            # test compile
            assert not isinstance(User.uc_name == 'jack', bool)
            u = q.filter(User.uc_name=='JACK').one()

            assert u.uc_name == "JACK"
            assert u not in sess.dirty

            u.name = "some user name"
            eq_(u.name, "some user name")
            assert u in sess.dirty
            eq_(u.uc_name, "SOME USER NAME")

            sess.flush()
            sess.expunge_all()

            q = sess.query(User)
            u2 = q.filter(User.name=='some user name').one()
            u3 = q.filter(User.uc_name=='SOME USER NAME').one()

            assert u2 is u3

            eq_(User.uc_name.attribute, 123)
            eq_(User.uc_name['key'], 'value')
            sess.rollback()

    def test_comparable_column(self):
        users, User = self.tables.users, self.classes.User

        class MyComparator(sa.orm.properties.ColumnProperty.Comparator):
            __hash__ = None
            def __eq__(self, other):
                # lower case comparison
                return func.lower(self.__clause_element__()) == func.lower(other)

            def intersects(self, other):
                # non-standard comparator
                return self.__clause_element__().op('&=')(other)

        mapper(User, users, properties={
            'name':sa.orm.column_property(users.c.name, comparator_factory=MyComparator)
        })

        assert_raises_message(
            AttributeError, 
            "Neither 'InstrumentedAttribute' object nor 'MyComparator' object has an attribute 'nonexistent'", 
            getattr, User.name, "nonexistent")

        eq_(str((User.name == 'ed').compile(dialect=sa.engine.default.DefaultDialect())) , "lower(users.name) = lower(:lower_1)")
        eq_(str((User.name.intersects('ed')).compile(dialect=sa.engine.default.DefaultDialect())), "users.name &= :name_1")


    def test_reentrant_compile(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        class MyFakeProperty(sa.orm.properties.ColumnProperty):
            def post_instrument_class(self, mapper):
                super(MyFakeProperty, self).post_instrument_class(mapper)
                configure_mappers()

        m1 = mapper(User, users, properties={
            'name':MyFakeProperty(users.c.name)
        })
        m2 = mapper(Address, addresses)
        configure_mappers()

        sa.orm.clear_mappers()
        class MyFakeProperty(sa.orm.properties.ColumnProperty):
            def post_instrument_class(self, mapper):
                super(MyFakeProperty, self).post_instrument_class(mapper)
                configure_mappers()

        m1 = mapper(User, users, properties={
            'name':MyFakeProperty(users.c.name)
        })
        m2 = mapper(Address, addresses)
        configure_mappers()

    def test_reconstructor(self):
        users = self.tables.users

        recon = []

        class User(object):
            @reconstructor
            def reconstruct(self):
                recon.append('go')

        mapper(User, users)

        User()
        eq_(recon, [])
        create_session().query(User).first()
        eq_(recon, ['go'])

    def test_reconstructor_inheritance(self):
        users = self.tables.users

        recon = []
        class A(object):
            @reconstructor
            def reconstruct(self):
                assert isinstance(self, A)
                recon.append('A')

        class B(A):
            @reconstructor
            def reconstruct(self):
                assert isinstance(self, B)
                recon.append('B')

        class C(A):
            @reconstructor
            def reconstruct(self):
                assert isinstance(self, C)
                recon.append('C')

        mapper(A, users, polymorphic_on=users.c.name,
               polymorphic_identity='jack')
        mapper(B, inherits=A, polymorphic_identity='ed')
        mapper(C, inherits=A, polymorphic_identity='chuck')

        A()
        B()
        C()
        eq_(recon, [])

        sess = create_session()
        sess.query(A).first()
        sess.query(B).first()
        sess.query(C).first()
        eq_(recon, ['A', 'B', 'C'])

    def test_unmapped_reconstructor_inheritance(self):
        users = self.tables.users

        recon = []
        class Base(object):
            @reconstructor
            def reconstruct(self):
                recon.append('go')

        class User(Base):
            pass

        mapper(User, users)

        User()
        eq_(recon, [])

        create_session().query(User).first()
        eq_(recon, ['go'])

    def test_unmapped_error(self):
        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(Address, addresses)
        sa.orm.clear_mappers()

        mapper(User, users, properties={
            'addresses':relationship(Address)
        })

        assert_raises_message(
            sa.orm.exc.UnmappedClassError, 
            "Class 'test.orm._fixtures.Address' is not mapped",
            sa.orm.configure_mappers)

    def test_unmapped_not_type_error(self):
        assert_raises_message(
            sa.exc.ArgumentError, 
            "Class object expected, got '5'.",
            class_mapper, 5
        )

    def test_unmapped_subclass_error_postmap(self):
        users = self.tables.users

        class Base(object):
            pass
        class Sub(Base):
            pass

        mapper(Base, users)
        sa.orm.configure_mappers()

        # we can create new instances, set attributes.
        s = Sub()
        s.name = 'foo'
        eq_(s.name, 'foo')
        eq_(
            attributes.get_history(s, 'name'),
            (['foo'], (), ())
        )

        # using it with an ORM operation, raises
        assert_raises(sa.orm.exc.UnmappedClassError,
                        create_session().add, Sub())

    def test_unmapped_subclass_error_premap(self):
        users = self.tables.users

        class Base(object):
            pass

        mapper(Base, users)

        class Sub(Base):
            pass

        sa.orm.configure_mappers()

        # we can create new instances, set attributes.
        s = Sub()
        s.name = 'foo'
        eq_(s.name, 'foo')
        eq_(
            attributes.get_history(s, 'name'),
            (['foo'], (), ())
        )

        # using it with an ORM operation, raises
        assert_raises(sa.orm.exc.UnmappedClassError,
                        create_session().add, Sub())

    def test_oldstyle_mixin(self):
        users = self.tables.users

        class OldStyle:
            pass
        class NewStyle(object):
            pass

        class A(NewStyle, OldStyle):
            pass

        mapper(A, users)

        class B(OldStyle, NewStyle):
            pass

        mapper(B, users)

class DocumentTest(fixtures.TestBase):

    def test_doc_propagate(self):
        metadata = MetaData()
        t1 = Table('t1', metadata,
            Column('col1', Integer, primary_key=True, doc="primary key column"),
            Column('col2', String, doc="data col"),
            Column('col3', String, doc="data col 2"),
            Column('col4', String, doc="data col 3"),
            Column('col5', String),
        )
        t2 = Table('t2', metadata,
            Column('col1', Integer, primary_key=True, doc="primary key column"),
            Column('col2', String, doc="data col"),
            Column('col3', Integer, ForeignKey('t1.col1'), doc="foreign key to t1.col1")
        )

        class Foo(object):
            pass

        class Bar(object):
            pass

        mapper(Foo, t1, properties={
            'bars':relationship(Bar, 
                                    doc="bar relationship", 
                                    backref=backref('foo',doc='foo relationship')
                                ),
            'foober':column_property(t1.c.col3, doc='alternate data col'),
            'hoho':synonym("col4", doc="syn of col4")
        })
        mapper(Bar, t2)
        configure_mappers()
        eq_(Foo.col1.__doc__, "primary key column")
        eq_(Foo.col2.__doc__, "data col")
        eq_(Foo.col5.__doc__, None)
        eq_(Foo.foober.__doc__, "alternate data col")
        eq_(Foo.bars.__doc__, "bar relationship")
        eq_(Foo.hoho.__doc__, "syn of col4")
        eq_(Bar.col1.__doc__, "primary key column")
        eq_(Bar.foo.__doc__, "foo relationship")

class ORMLoggingTest(_fixtures.FixtureTest):
    def setup(self):
        self.buf = logging.handlers.BufferingHandler(100)
        for log in [
            logging.getLogger('sqlalchemy.orm'),
        ]:
            log.addHandler(self.buf)

    def teardown(self):
        for log in [
            logging.getLogger('sqlalchemy.orm'),
        ]:
            log.removeHandler(self.buf)

    def _current_messages(self):
        return [b.getMessage() for b in self.buf.buffer]

    def test_mapper_info_aliased(self):
        User, users = self.classes.User, self.tables.users
        tb = users.select().alias()
        mapper(User, tb)
        s = Session()
        s.add(User(name='ed'))
        s.commit()

        for msg in self._current_messages():
            assert msg.startswith('(User|%%(%d anon)s) ' % id(tb))

class OptionsTest(_fixtures.FixtureTest):

    @testing.fails_on('maxdb', 'FIXME: unknown')
    def test_synonym_options(self):
        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='select',
                                 order_by=addresses.c.id),
            adlist = synonym('addresses')))

        def go():
            sess = create_session()
            u = (sess.query(User).
                 order_by(User.id).
                 options(sa.orm.joinedload('adlist')).
                 filter_by(name='jack')).one()
            eq_(u.adlist,
                [self.static.user_address_result[0].addresses[0]])
        self.assert_sql_count(testing.db, go, 1)

    def test_eager_options(self):
        """A lazy relationship can be upgraded to an eager relationship."""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses),
                                 order_by=addresses.c.id)))

        sess = create_session()
        l = (sess.query(User).
             order_by(User.id).
             options(sa.orm.joinedload('addresses'))).all()

        def go():
            eq_(l, self.static.user_address_result)
        self.sql_count_(0, go)

    @testing.fails_on('maxdb', 'FIXME: unknown')
    def test_eager_options_with_limit(self):
        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses=relationship(mapper(Address, addresses), lazy='select')))

        sess = create_session()
        u = (sess.query(User).
             options(sa.orm.joinedload('addresses')).
             filter_by(id=8)).one()

        def go():
            eq_(u.id, 8)
            eq_(len(u.addresses), 3)
        self.sql_count_(0, go)

        sess.expunge_all()

        u = sess.query(User).filter_by(id=8).one()
        eq_(u.id, 8)
        eq_(len(u.addresses), 3)

    @testing.fails_on('maxdb', 'FIXME: unknown')
    def test_lazy_options_with_limit(self):
        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='joined')))

        sess = create_session()
        u = (sess.query(User).
             options(sa.orm.lazyload('addresses')).
             filter_by(id=8)).one()

        def go():
            eq_(u.id, 8)
            eq_(len(u.addresses), 3)
        self.sql_count_(1, go)

    def test_eager_degrade(self):
        """An eager relationship automatically degrades to a lazy relationship 
        if eager columns are not available"""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), 
                                lazy='joined', order_by=addresses.c.id)))

        sess = create_session()
        # first test straight eager load, 1 statement
        def go():
            l = sess.query(User).order_by(User.id).all()
            eq_(l, self.static.user_address_result)
        self.sql_count_(1, go)

        sess.expunge_all()

        # then select just from users.  run it into instances.
        # then assert the data, which will launch 3 more lazy loads
        # (previous users in session fell out of scope and were removed from
        # session's identity map)
        r = users.select().order_by(users.c.id).execute()
        def go():
            l = list(sess.query(User).instances(r))
            eq_(l, self.static.user_address_result)
        self.sql_count_(4, go)

    def test_eager_degrade_deep(self):
        users, Keyword, items, order_items, orders, Item, User, Address, keywords, item_keywords, Order, addresses = (self.tables.users,
                                self.classes.Keyword,
                                self.tables.items,
                                self.tables.order_items,
                                self.tables.orders,
                                self.classes.Item,
                                self.classes.User,
                                self.classes.Address,
                                self.tables.keywords,
                                self.tables.item_keywords,
                                self.classes.Order,
                                self.tables.addresses)

        # test with a deeper set of eager loads.  when we first load the three
        # users, they will have no addresses or orders.  the number of lazy
        # loads when traversing the whole thing will be three for the
        # addresses and three for the orders.
        mapper(Address, addresses)

        mapper(Keyword, keywords)

        mapper(Item, items, properties=dict(
            keywords=relationship(Keyword, secondary=item_keywords,
                              lazy='joined',
                              order_by=item_keywords.c.keyword_id)))

        mapper(Order, orders, properties=dict(
            items=relationship(Item, secondary=order_items, lazy='joined',
                           order_by=order_items.c.item_id)))

        mapper(User, users, properties=dict(
            addresses=relationship(Address, lazy='joined',
                               order_by=addresses.c.id),
            orders=relationship(Order, lazy='joined',
                            order_by=orders.c.id)))

        sess = create_session()

        # first test straight eager load, 1 statement
        def go():
            l = sess.query(User).order_by(User.id).all()
            eq_(l, self.static.user_all_result)
        self.assert_sql_count(testing.db, go, 1)

        sess.expunge_all()

        # then select just from users.  run it into instances.
        # then assert the data, which will launch 6 more lazy loads
        r = users.select().execute()
        def go():
            l = list(sess.query(User).instances(r))
            eq_(l, self.static.user_all_result)
        self.assert_sql_count(testing.db, go, 6)

    def test_lazy_options(self):
        """An eager relationship can be upgraded to a lazy relationship."""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='joined')
        ))

        sess = create_session()
        l = (sess.query(User).
             order_by(User.id).
             options(sa.orm.lazyload('addresses'))).all()

        def go():
            eq_(l, self.static.user_address_result)
        self.sql_count_(4, go)

    def test_option_propagate(self):
        users, items, order_items, Order, Item, User, orders = (self.tables.users,
                                self.tables.items,
                                self.tables.order_items,
                                self.classes.Order,
                                self.classes.Item,
                                self.classes.User,
                                self.tables.orders)

        mapper(User, users, properties=dict(
            orders = relationship(Order)
        ))
        mapper(Order, orders, properties=dict(
            items = relationship(Item, secondary=order_items)
        ))
        mapper(Item, items)

        sess = create_session()

        oalias = aliased(Order)
        opt1 = sa.orm.joinedload(User.orders, Order.items)
        opt2a, opt2b = sa.orm.contains_eager(User.orders, Order.items, alias=oalias)
        u1 = sess.query(User).join(oalias, User.orders).options(opt1, opt2a, opt2b).first()
        ustate = attributes.instance_state(u1)
        assert opt1 in ustate.load_options
        assert opt2a not in ustate.load_options
        assert opt2b not in ustate.load_options


class DeepOptionsTest(_fixtures.FixtureTest):
    @classmethod
    def setup_mappers(cls):
        users, Keyword, items, order_items, Order, Item, User, keywords, item_keywords, orders = (cls.tables.users,
                                cls.classes.Keyword,
                                cls.tables.items,
                                cls.tables.order_items,
                                cls.classes.Order,
                                cls.classes.Item,
                                cls.classes.User,
                                cls.tables.keywords,
                                cls.tables.item_keywords,
                                cls.tables.orders)

        mapper(Keyword, keywords)

        mapper(Item, items, properties=dict(
            keywords=relationship(Keyword, item_keywords,
                              order_by=item_keywords.c.item_id)))

        mapper(Order, orders, properties=dict(
            items=relationship(Item, order_items,
                           order_by=items.c.id)))

        mapper(User, users, order_by=users.c.id, properties=dict(
            orders=relationship(Order, order_by=orders.c.id)))

    def test_deep_options_1(self):
        User = self.classes.User

        sess = create_session()

        # joinedload nothing.
        u = sess.query(User).all()
        def go():
            x = u[0].orders[1].items[0].keywords[1]
        self.assert_sql_count(testing.db, go, 3)

    def test_deep_options_2(self):
        """test (joined|subquery)load_all() options"""

        User = self.classes.User


        sess = create_session()

        l = (sess.query(User).
              options(sa.orm.joinedload_all('orders.items.keywords'))).all()
        def go():
            x = l[0].orders[1].items[0].keywords[1]
        self.sql_count_(0, go)

        sess = create_session()

        l = (sess.query(User).
              options(sa.orm.subqueryload_all('orders.items.keywords'))).all()
        def go():
            x = l[0].orders[1].items[0].keywords[1]
        self.sql_count_(0, go)


    def test_deep_options_3(self):
        User = self.classes.User

        sess = create_session()

        # same thing, with separate options calls
        q2 = (sess.query(User).
              options(sa.orm.joinedload('orders')).
              options(sa.orm.joinedload('orders.items')).
              options(sa.orm.joinedload('orders.items.keywords')))
        u = q2.all()
        def go():
            x = u[0].orders[1].items[0].keywords[1]
        self.sql_count_(0, go)

    def test_deep_options_4(self):
        Item, User, Order = (self.classes.Item,
                                self.classes.User,
                                self.classes.Order)

        sess = create_session()

        assert_raises_message(
            sa.exc.ArgumentError,
            "Can't find property 'items' on any entity "
            "specified in this Query.",
            sess.query(User).options, sa.orm.joinedload(Order.items))

        # joinedload "keywords" on items.  it will lazy load "orders", then
        # lazy load the "items" on the order, but on "items" it will eager
        # load the "keywords"
        q3 = sess.query(User).options(sa.orm.joinedload('orders.items.keywords'))
        u = q3.all()
        def go():
            x = u[0].orders[1].items[0].keywords[1]
        self.sql_count_(2, go)

        sess = create_session()
        q3 = sess.query(User).options(
                    sa.orm.joinedload(User.orders, Order.items, Item.keywords))
        u = q3.all()
        def go():
            x = u[0].orders[1].items[0].keywords[1]
        self.sql_count_(2, go)

class ValidatorTest(_fixtures.FixtureTest):
    def test_scalar(self):
        users = self.tables.users

        class User(fixtures.ComparableEntity):
            @validates('name')
            def validate_name(self, key, name):
                assert name != 'fred'
                return name + ' modified'

        mapper(User, users)
        sess = create_session()
        u1 = User(name='ed')
        eq_(u1.name, 'ed modified')
        assert_raises(AssertionError, setattr, u1, "name", "fred")
        eq_(u1.name, 'ed modified')
        sess.add(u1)
        sess.flush()
        sess.expunge_all()
        eq_(sess.query(User).filter_by(name='ed modified').one(), User(name='ed'))

    def test_collection(self):
        users, addresses, Address = (self.tables.users,
                                self.tables.addresses,
                                self.classes.Address)

        class User(fixtures.ComparableEntity):
            @validates('addresses')
            def validate_address(self, key, ad):
                assert '@' in ad.email_address
                return ad

        mapper(User, users, properties={'addresses':relationship(Address)})
        mapper(Address, addresses)
        sess = create_session()
        u1 = User(name='edward')
        assert_raises(AssertionError, u1.addresses.append, Address(email_address='noemail'))
        u1.addresses.append(Address(id=15, email_address='foo@bar.com'))
        sess.add(u1)
        sess.flush()
        sess.expunge_all()
        eq_(
            sess.query(User).filter_by(name='edward').one(), 
            User(name='edward', addresses=[Address(email_address='foo@bar.com')])
        )

    def test_validators_dict(self):
        users, addresses, Address = (self.tables.users,
                                     self.tables.addresses,
                                     self.classes.Address)

        class User(fixtures.ComparableEntity):

            @validates('name')
            def validate_name(self, key, name):
                assert name != 'fred'
                return name + ' modified'

            @validates('addresses')
            def validate_address(self, key, ad):
                assert '@' in ad.email_address
                return ad

            def simple_function(self, key, value):
                return key, value

        u_m = mapper(User,
                      users,
                      properties={'addresses':relationship(Address)})
        mapper(Address, addresses)

        eq_(
            dict((k, v.__name__) for k, v in u_m.validators.items()),
            {'name':'validate_name', 
            'addresses':'validate_address'}
        )

class ComparatorFactoryTest(_fixtures.FixtureTest, AssertsCompiledSQL):
    def test_kwarg_accepted(self):
        users, Address = self.tables.users, self.classes.Address

        class DummyComposite(object):
            def __init__(self, x, y):
                pass

        from sqlalchemy.orm.interfaces import PropComparator

        class MyFactory(PropComparator):
            pass

        for args in (
            (column_property, users.c.name),
            (deferred, users.c.name),
            (synonym, 'name'),
            (composite, DummyComposite, users.c.id, users.c.name),
            (relationship, Address),
            (backref, 'address'),
            (comparable_property, ),
            (dynamic_loader, Address)
        ):
            fn = args[0]
            args = args[1:]
            fn(comparator_factory=MyFactory, *args)

    def test_column(self):
        User, users = self.classes.User, self.tables.users

        from sqlalchemy.orm.properties import ColumnProperty

        class MyFactory(ColumnProperty.Comparator):
            __hash__ = None
            def __eq__(self, other):
                return func.foobar(self.__clause_element__()) == func.foobar(other)
        mapper(User, users, properties={'name':column_property(users.c.name, comparator_factory=MyFactory)})
        self.assert_compile(User.name == 'ed', "foobar(users.name) = foobar(:foobar_1)", dialect=default.DefaultDialect())
        self.assert_compile(aliased(User).name == 'ed', "foobar(users_1.name) = foobar(:foobar_1)", dialect=default.DefaultDialect())

    def test_synonym(self):
        users, User = self.tables.users, self.classes.User

        from sqlalchemy.orm.properties import ColumnProperty
        class MyFactory(ColumnProperty.Comparator):
            __hash__ = None
            def __eq__(self, other):
                return func.foobar(self.__clause_element__()) ==\
                            func.foobar(other)

        mapper(User, users, properties={
                    'name':synonym('_name', map_column=True,
                                    comparator_factory=MyFactory)
                    })
        self.assert_compile(
                    User.name == 'ed', 
                    "foobar(users.name) = foobar(:foobar_1)",
                    dialect=default.DefaultDialect())

        self.assert_compile(
                    aliased(User).name == 'ed', 
                    "foobar(users_1.name) = foobar(:foobar_1)",
                    dialect=default.DefaultDialect())

    def test_relationship(self):
        users, Address, addresses, User = (self.tables.users,
                                self.classes.Address,
                                self.tables.addresses,
                                self.classes.User)

        from sqlalchemy.orm.properties import PropertyLoader

        class MyFactory(PropertyLoader.Comparator):
            __hash__ = None
            def __eq__(self, other):
                return func.foobar(self.__clause_element__().c.user_id) == func.foobar(other.id)

        class MyFactory2(PropertyLoader.Comparator):
            __hash__ = None
            def __eq__(self, other):
                return func.foobar(self.__clause_element__().c.id) == func.foobar(other.user_id)

        mapper(User, users)
        mapper(Address, addresses, properties={
            'user':relationship(User, comparator_factory=MyFactory, 
                backref=backref("addresses", comparator_factory=MyFactory2)
            )
            }
        )
        self.assert_compile(Address.user == User(id=5), "foobar(addresses.user_id) = foobar(:foobar_1)", dialect=default.DefaultDialect())
        self.assert_compile(User.addresses == Address(id=5, user_id=7), "foobar(users.id) = foobar(:foobar_1)", dialect=default.DefaultDialect())

        self.assert_compile(aliased(Address).user == User(id=5), "foobar(addresses_1.user_id) = foobar(:foobar_1)", dialect=default.DefaultDialect())
        self.assert_compile(aliased(User).addresses == Address(id=5, user_id=7), "foobar(users_1.id) = foobar(:foobar_1)", dialect=default.DefaultDialect())


class SecondaryOptionsTest(fixtures.MappedTest):
    """test that the contains_eager() option doesn't bleed into a secondary load."""

    run_inserts = 'once'

    run_deletes = None

    @classmethod
    def define_tables(cls, metadata):
        Table("base", metadata, 
            Column('id', Integer, primary_key=True),
            Column('type', String(50), nullable=False)
        )
        Table("child1", metadata,
            Column('id', Integer, ForeignKey('base.id'), primary_key=True),
            Column('child2id', Integer, ForeignKey('child2.id'), nullable=False)
        )
        Table("child2", metadata,
            Column('id', Integer, ForeignKey('base.id'), primary_key=True),
        )
        Table('related', metadata,
            Column('id', Integer, ForeignKey('base.id'), primary_key=True),
        )

    @classmethod
    def setup_mappers(cls):
        child1, child2, base, related = (cls.tables.child1,
                                cls.tables.child2,
                                cls.tables.base,
                                cls.tables.related)

        class Base(cls.Comparable):
            pass
        class Child1(Base):
            pass
        class Child2(Base):
            pass
        class Related(cls.Comparable):
            pass
        mapper(Base, base, polymorphic_on=base.c.type, properties={
            'related':relationship(Related, uselist=False)
        })
        mapper(Child1, child1, inherits=Base, 
                polymorphic_identity='child1', 
            properties={
            'child2':relationship(Child2, 
                                    primaryjoin=child1.c.child2id==base.c.id, 
                                    foreign_keys=child1.c.child2id)
        })
        mapper(Child2, child2, inherits=Base, polymorphic_identity='child2')
        mapper(Related, related)

    @classmethod
    def insert_data(cls):
        child1, child2, base, related = (cls.tables.child1,
                                cls.tables.child2,
                                cls.tables.base,
                                cls.tables.related)

        base.insert().execute([
            {'id':1, 'type':'child1'},
            {'id':2, 'type':'child1'},
            {'id':3, 'type':'child1'},
            {'id':4, 'type':'child2'},
            {'id':5, 'type':'child2'},
            {'id':6, 'type':'child2'},
        ])
        child2.insert().execute([
            {'id':4},
            {'id':5},
            {'id':6},
        ])
        child1.insert().execute([
            {'id':1, 'child2id':4},
            {'id':2, 'child2id':5},
            {'id':3, 'child2id':6},
        ])
        related.insert().execute([
            {'id':1},
            {'id':2},
            {'id':3},
            {'id':4},
            {'id':5},
            {'id':6},
        ])

    def test_contains_eager(self):
        Child1, Related = self.classes.Child1, self.classes.Related

        sess = create_session()

        child1s = sess.query(Child1).\
                    join(Child1.related).\
                    options(sa.orm.contains_eager(Child1.related)).\
                    order_by(Child1.id)

        def go():
            eq_(
                child1s.all(),
                [
                    Child1(id=1, related=Related(id=1)), 
                    Child1(id=2, related=Related(id=2)), 
                    Child1(id=3, related=Related(id=3))
                ]
            )
        self.assert_sql_count(testing.db, go, 1)

        c1 = child1s[0]
 
        self.assert_sql_execution(
            testing.db, 
            lambda: c1.child2, 
            CompiledSQL(
                "SELECT child2.id AS child2_id, base.id AS base_id, base.type AS base_type "
                "FROM base JOIN child2 ON base.id = child2.id "
                "WHERE base.id = :param_1",
                {'param_1':4}
            )
        )

    def test_joinedload_on_other(self):
        Child1, Related = self.classes.Child1, self.classes.Related

        sess = create_session()

        child1s = sess.query(Child1).join(Child1.related).options(sa.orm.joinedload(Child1.related)).order_by(Child1.id)

        def go():
            eq_(
                child1s.all(),
                [Child1(id=1, related=Related(id=1)), Child1(id=2, related=Related(id=2)), Child1(id=3, related=Related(id=3))]
            )
        self.assert_sql_count(testing.db, go, 1)

        c1 = child1s[0]

        self.assert_sql_execution(
            testing.db, 
            lambda: c1.child2, 
            CompiledSQL(
            "SELECT child2.id AS child2_id, base.id AS base_id, base.type AS base_type "
            "FROM base JOIN child2 ON base.id = child2.id WHERE base.id = :param_1",

#   joinedload- this shouldn't happen
#            "SELECT base.id AS base_id, child2.id AS child2_id, base.type AS base_type, "
#            "related_1.id AS related_1_id FROM base JOIN child2 ON base.id = child2.id "
#            "LEFT OUTER JOIN related AS related_1 ON base.id = related_1.id WHERE base.id = :param_1",
                {'param_1':4}
            )
        )

    def test_joinedload_on_same(self):
        Child1, Child2, Related = (self.classes.Child1,
                                self.classes.Child2,
                                self.classes.Related)

        sess = create_session()

        child1s = sess.query(Child1).join(Child1.related).options(sa.orm.joinedload(Child1.child2, Child2.related)).order_by(Child1.id)

        def go():
            eq_(
                child1s.all(),
                [Child1(id=1, related=Related(id=1)), Child1(id=2, related=Related(id=2)), Child1(id=3, related=Related(id=3))]
            )
        self.assert_sql_count(testing.db, go, 4)

        c1 = child1s[0]

        # this *does* joinedload
        self.assert_sql_execution(
            testing.db, 
            lambda: c1.child2, 
            CompiledSQL(
                "SELECT child2.id AS child2_id, base.id AS base_id, base.type AS base_type, "
                "related_1.id AS related_1_id FROM base JOIN child2 ON base.id = child2.id "
                "LEFT OUTER JOIN related AS related_1 ON base.id = related_1.id WHERE base.id = :param_1",
                {'param_1':4}
            )
        )


class NoLoadTest(_fixtures.FixtureTest):
    run_inserts = 'once'
    run_deletes = None

    def test_basic(self):
        """A basic one-to-many lazy load"""

        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        m = mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='noload')
        ))
        q = create_session().query(m)
        l = [None]
        def go():
            x = q.filter(User.id == 7).all()
            x[0].addresses
            l[0] = x
        self.assert_sql_count(testing.db, go, 1)

        self.assert_result(l[0], User,
            {'id' : 7, 'addresses' : (Address, [])},
            )

    def test_options(self):
        Address, addresses, users, User = (self.classes.Address,
                                self.tables.addresses,
                                self.tables.users,
                                self.classes.User)

        m = mapper(User, users, properties=dict(
            addresses = relationship(mapper(Address, addresses), lazy='noload')
        ))
        q = create_session().query(m).options(sa.orm.lazyload('addresses'))
        l = [None]
        def go():
            x = q.filter(User.id == 7).all()
            x[0].addresses
            l[0] = x
        self.sql_count_(2, go)

        self.assert_result(l[0], User,
            {'id' : 7, 'addresses' : (Address, [{'id' : 1}])},
            )





class RequirementsTest(fixtures.MappedTest):
    """Tests the contract for user classes."""

    @classmethod
    def define_tables(cls, metadata):
        Table('ht1', metadata,
              Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
              Column('value', String(10)))
        Table('ht2', metadata,
              Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
              Column('ht1_id', Integer, ForeignKey('ht1.id')),
              Column('value', String(10)))
        Table('ht3', metadata,
              Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
              Column('value', String(10)))
        Table('ht4', metadata,
              Column('ht1_id', Integer, ForeignKey('ht1.id'), primary_key=True),
              Column('ht3_id', Integer, ForeignKey('ht3.id'), primary_key=True))
        Table('ht5', metadata,
              Column('ht1_id', Integer, ForeignKey('ht1.id'), primary_key=True))
        Table('ht6', metadata,
              Column('ht1a_id', Integer, ForeignKey('ht1.id'), primary_key=True),
              Column('ht1b_id', Integer, ForeignKey('ht1.id'), primary_key=True),
              Column('value', String(10)))

    # Py2K
    def test_baseclass(self):
        ht1 = self.tables.ht1

        class OldStyle:
            pass

        assert_raises(sa.exc.ArgumentError, mapper, OldStyle, ht1)

        assert_raises(sa.exc.ArgumentError, mapper, 123)

        class NoWeakrefSupport(str):
            pass

        # TODO: is weakref support detectable without an instance?
        #self.assertRaises(sa.exc.ArgumentError, mapper, NoWeakrefSupport, t2)
    # end Py2K

    class _ValueBase(object):
        def __init__(self, value='abc', id=None):
            self.id = id
            self.value = value
        def __nonzero__(self):
            return False
        def __hash__(self):
            return hash(self.value)
        def __eq__(self, other):
            if isinstance(other, type(self)):
                return self.value == other.value
            return False

    def test_comparison_overrides(self):
        """Simple tests to ensure users can supply comparison __methods__.

        The suite-level test --options are better suited to detect
        problems- they add selected __methods__ across the board on all
        ORM tests.  This test simply shoves a variety of operations
        through the ORM to catch basic regressions early in a standard
        test run.
        """

        ht6, ht5, ht4, ht3, ht2, ht1 = (self.tables.ht6,
                                self.tables.ht5,
                                self.tables.ht4,
                                self.tables.ht3,
                                self.tables.ht2,
                                self.tables.ht1)


        class H1(self._ValueBase):
            pass
        class H2(self._ValueBase):
            pass
        class H3(self._ValueBase):
            pass
        class H6(self._ValueBase):
            pass

        mapper(H1, ht1, properties={
            'h2s': relationship(H2, backref='h1'),
            'h3s': relationship(H3, secondary=ht4, backref='h1s'),
            'h1s': relationship(H1, secondary=ht5, backref='parent_h1'),
            't6a': relationship(H6, backref='h1a',
                                primaryjoin=ht1.c.id==ht6.c.ht1a_id),
            't6b': relationship(H6, backref='h1b',
                                primaryjoin=ht1.c.id==ht6.c.ht1b_id),
            })
        mapper(H2, ht2)
        mapper(H3, ht3)
        mapper(H6, ht6)

        s = create_session()
        s.add_all([
            H1('abc'),
            H1('def'),
        ])
        h1 = H1('ghi')
        s.add(h1)
        h1.h2s.append(H2('abc'))
        h1.h3s.extend([H3(), H3()])
        h1.h1s.append(H1())

        s.flush()
        eq_(ht1.count().scalar(), 4)

        h6 = H6()
        h6.h1a = h1
        h6.h1b = h1

        h6 = H6()
        h6.h1a = h1
        h6.h1b = x = H1()
        assert x in s

        h6.h1b.h2s.append(H2('def'))

        s.flush()

        h1.h2s.extend([H2('abc'), H2('def')])
        s.flush()

        h1s = s.query(H1).options(sa.orm.joinedload('h2s')).all()
        eq_(len(h1s), 5)

        self.assert_unordered_result(h1s, H1,
                                     {'h2s': []},
                                     {'h2s': []},
                                     {'h2s': (H2, [{'value': 'abc'},
                                                   {'value': 'def'},
                                                   {'value': 'abc'}])},
                                     {'h2s': []},
                                     {'h2s': (H2, [{'value': 'def'}])})

        h1s = s.query(H1).options(sa.orm.joinedload('h3s')).all()

        eq_(len(h1s), 5)
        h1s = s.query(H1).options(sa.orm.joinedload_all('t6a.h1b'),
                                  sa.orm.joinedload('h2s'),
                                  sa.orm.joinedload_all('h3s.h1s')).all()
        eq_(len(h1s), 5)


    def test_composite_results(self):
        ht2, ht1 = (self.tables.ht2,
                        self.tables.ht1)


        class H1(self._ValueBase):
            def __init__(self, value, id, h2s):
                self.value = value
                self.id = id
                self.h2s = h2s
        class H2(self._ValueBase):
            def __init__(self, value, id):
                self.value = value
                self.id = id

        mapper(H1, ht1, properties={
            'h2s': relationship(H2, backref='h1'),
        })
        mapper(H2, ht2)
        s = Session()
        s.add_all([
            H1('abc', 1, h2s=[
                H2('abc', id=1),
                H2('def', id=2),
                H2('def', id=3),
            ]),
            H1('def', 2, h2s=[
                H2('abc', id=4),
                H2('abc', id=5),
                H2('def', id=6),
            ]),
        ])
        s.commit()
        eq_(
            [(h1.value, h1.id, h2.value, h2.id) 
            for h1, h2 in 
            s.query(H1, H2).join(H1.h2s).order_by(H1.id, H2.id)],
            [
                ('abc', 1, 'abc', 1),
                ('abc', 1, 'def', 2),
                ('abc', 1, 'def', 3),
                ('def', 2, 'abc', 4),
                ('def', 2, 'abc', 5),
                ('def', 2, 'def', 6),
            ]
        )

    def test_nonzero_len_recursion(self):
        ht1 = self.tables.ht1

        class H1(object):
            def __len__(self):
                return len(self.get_value())

            def get_value(self):
                self.value = "foobar"
                return self.value

        class H2(object):
            def __nonzero__(self):
                return bool(self.get_value())

            def get_value(self):
                self.value = "foobar"
                return self.value

        mapper(H1, ht1)
        mapper(H2, ht1)

        h1 = H1()
        h1.value = "Asdf"
        h1.value = "asdf asdf" # ding

        h2 = H2()
        h2.value = "Asdf"
        h2.value = "asdf asdf" # ding

class MagicNamesTest(fixtures.MappedTest):

    @classmethod
    def define_tables(cls, metadata):
        Table('cartographers', metadata,
              Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
              Column('name', String(50)),
              Column('alias', String(50)),
              Column('quip', String(100)))
        Table('maps', metadata,
              Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
              Column('cart_id', Integer,
                     ForeignKey('cartographers.id')),
              Column('state', String(2)),
              Column('data', sa.Text))

    @classmethod
    def setup_classes(cls):
        class Cartographer(cls.Basic):
            pass

        class Map(cls.Basic):
            pass

    def test_mappish(self):
        maps, Cartographer, cartographers, Map = (self.tables.maps,
                                self.classes.Cartographer,
                                self.tables.cartographers,
                                self.classes.Map)

        mapper(Cartographer, cartographers, properties=dict(
            query=cartographers.c.quip))
        mapper(Map, maps, properties=dict(
            mapper=relationship(Cartographer, backref='maps')))

        c = Cartographer(name='Lenny', alias='The Dude',
                         query='Where be dragons?')
        m = Map(state='AK', mapper=c)

        sess = create_session()
        sess.add(c)
        sess.flush()
        sess.expunge_all()

        for C, M in ((Cartographer, Map),
                     (sa.orm.aliased(Cartographer), sa.orm.aliased(Map))):
            c1 = (sess.query(C).
                  filter(C.alias=='The Dude').
                  filter(C.query=='Where be dragons?')).one()
            m1 = sess.query(M).filter(M.mapper==c1).one()

    def test_direct_stateish(self):
        for reserved in (sa.orm.instrumentation.ClassManager.STATE_ATTR,
                         sa.orm.instrumentation.ClassManager.MANAGER_ATTR):
            t = Table('t', sa.MetaData(),
                      Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
                      Column(reserved, Integer))
            class T(object):
                pass

            assert_raises_message(
                KeyError,
                ('%r: requested attribute name conflicts with '
                 'instrumentation attribute of the same name.' % reserved),
                mapper, T, t)

    def test_indirect_stateish(self):
        maps = self.tables.maps

        for reserved in (sa.orm.instrumentation.ClassManager.STATE_ATTR,
                         sa.orm.instrumentation.ClassManager.MANAGER_ATTR):
            class M(object):
                pass

            assert_raises_message(
                KeyError,
                ('requested attribute name conflicts with '
                 'instrumentation attribute of the same name'),
                mapper, M, maps, properties={
                  reserved: maps.c.state})