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|
"""basic tests of lazy loaded attributes"""
from sqlalchemy import testing
from sqlalchemy.orm import immediateload
from sqlalchemy.orm import relationship
from sqlalchemy.testing import eq_
from sqlalchemy.testing.fixtures import fixture_session
from test.orm import _fixtures
class ImmediateTest(_fixtures.FixtureTest):
run_inserts = "once"
run_deletes = None
@testing.combinations(
("raise",),
("raise_on_sql",),
("select",),
("immediate"),
)
def test_basic_option(self, default_lazy):
Address, addresses, users, User = (
self.classes.Address,
self.tables.addresses,
self.tables.users,
self.classes.User,
)
self.mapper_registry.map_imperatively(Address, addresses)
self.mapper_registry.map_imperatively(
User,
users,
properties={"addresses": relationship(Address, lazy=default_lazy)},
)
sess = fixture_session()
result = (
sess.query(User)
.options(immediateload(User.addresses))
.filter(users.c.id == 7)
.all()
)
eq_(len(sess.identity_map), 2)
sess.close()
eq_(
[
User(
id=7,
addresses=[Address(id=1, email_address="jack@bean.com")],
)
],
result,
)
@testing.combinations(
("raise",),
("raise_on_sql",),
("select",),
("immediate"),
)
def test_basic_option_m2o(self, default_lazy):
Address, addresses, users, User = (
self.classes.Address,
self.tables.addresses,
self.tables.users,
self.classes.User,
)
self.mapper_registry.map_imperatively(
Address,
addresses,
properties={"user": relationship(User, lazy=default_lazy)},
)
self.mapper_registry.map_imperatively(User, users)
sess = fixture_session()
result = (
sess.query(Address)
.options(immediateload(Address.user))
.filter(Address.id == 1)
.all()
)
eq_(len(sess.identity_map), 2)
sess.close()
eq_(
[Address(id=1, email_address="jack@bean.com", user=User(id=7))],
result,
)
def test_basic(self):
Address, addresses, users, User = (
self.classes.Address,
self.tables.addresses,
self.tables.users,
self.classes.User,
)
self.mapper_registry.map_imperatively(Address, addresses)
self.mapper_registry.map_imperatively(
User,
users,
properties={"addresses": relationship(Address, lazy="immediate")},
)
sess = fixture_session()
result = sess.query(User).filter(users.c.id == 7).all()
eq_(len(sess.identity_map), 2)
sess.close()
eq_(
[
User(
id=7,
addresses=[Address(id=1, email_address="jack@bean.com")],
)
],
result,
)
@testing.combinations(
("joined",),
("selectin",),
("subquery",),
)
def test_m2one_side(self, o2m_lazy):
Address, addresses, users, User = (
self.classes.Address,
self.tables.addresses,
self.tables.users,
self.classes.User,
)
self.mapper_registry.map_imperatively(
Address,
addresses,
properties={
"user": relationship(
User, lazy="immediate", back_populates="addresses"
)
},
)
self.mapper_registry.map_imperatively(
User,
users,
properties={
"addresses": relationship(
Address, lazy=o2m_lazy, back_populates="user"
)
},
)
sess = fixture_session()
u1 = sess.query(User).filter(users.c.id == 7).one()
sess.close()
assert "addresses" in u1.__dict__
assert "user" in u1.addresses[0].__dict__
@testing.combinations(
("immediate",),
("joined",),
("selectin",),
("subquery",),
)
def test_o2mone_side(self, m2o_lazy):
Address, addresses, users, User = (
self.classes.Address,
self.tables.addresses,
self.tables.users,
self.classes.User,
)
self.mapper_registry.map_imperatively(
Address,
addresses,
properties={
"user": relationship(
User, lazy=m2o_lazy, back_populates="addresses"
)
},
)
self.mapper_registry.map_imperatively(
User,
users,
properties={
"addresses": relationship(
Address, lazy="immediate", back_populates="user"
)
},
)
sess = fixture_session()
u1 = sess.query(User).filter(users.c.id == 7).one()
sess.close()
assert "addresses" in u1.__dict__
# current behavior of "immediate" is that subsequent eager loaders
# aren't fired off. This is because the "lazyload" strategy
# does not invoke eager loaders.
assert "user" not in u1.addresses[0].__dict__
|
