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from sqlalchemy import exc
from sqlalchemy import select
from sqlalchemy import testing
from sqlalchemy.engine import result_tuple
from sqlalchemy.orm import aliased
from sqlalchemy.orm import loading
from sqlalchemy.orm import mapper
from sqlalchemy.orm import relationship
from sqlalchemy.testing import mock
from sqlalchemy.testing.assertions import assert_raises
from sqlalchemy.testing.assertions import assert_raises_message
from sqlalchemy.testing.assertions import eq_
from sqlalchemy.testing.fixtures import fixture_session
from . import _fixtures
# class GetFromIdentityTest(_fixtures.FixtureTest):
# class LoadOnIdentTest(_fixtures.FixtureTest):
class InstanceProcessorTest(_fixtures.FixtureTest):
def test_state_no_load_path_comparison(self):
# test issue #5110
User, Order, Address = self.classes("User", "Order", "Address")
users, orders, addresses = self.tables("users", "orders", "addresses")
mapper(
User,
users,
properties={
"addresses": relationship(Address, lazy="joined"),
"orders": relationship(
Order, lazy="joined", order_by=orders.c.id
),
},
)
mapper(
Order,
orders,
properties={"address": relationship(Address, lazy="joined")},
)
mapper(Address, addresses)
s = fixture_session()
def go():
eq_(
User(
id=7,
orders=[
Order(id=1, address=Address(id=1)),
Order(id=3, address=Address(id=1)),
Order(id=5, address=None),
],
),
s.query(User).populate_existing().get(7),
)
self.assert_sql_count(testing.db, go, 1)
class InstancesTest(_fixtures.FixtureTest):
run_setup_mappers = "once"
run_inserts = "once"
run_deletes = None
@classmethod
def setup_mappers(cls):
cls._setup_stock_mapping()
def test_cursor_close_w_failed_rowproc(self):
User = self.classes.User
s = fixture_session()
q = s.query(User)
ctx = q._compile_context()
cursor = mock.Mock()
ctx.compile_state._entities = [
mock.Mock(row_processor=mock.Mock(side_effect=Exception("boom")))
]
assert_raises(Exception, loading.instances, cursor, ctx)
assert cursor.close.called, "Cursor wasn't closed"
def test_row_proc_not_created(self):
User = self.classes.User
s = fixture_session()
q = s.query(User.id, User.name)
stmt = select(User.id)
assert_raises_message(
exc.NoSuchColumnError,
"Could not locate column in row for column 'users.name'",
q.from_statement(stmt).all,
)
class MergeResultTest(_fixtures.FixtureTest):
run_setup_mappers = "once"
run_inserts = "once"
run_deletes = None
@classmethod
def setup_mappers(cls):
cls._setup_stock_mapping()
def _fixture(self):
User = self.classes.User
s = fixture_session()
u1, u2, u3, u4 = (
User(id=1, name="u1"),
User(id=2, name="u2"),
User(id=7, name="u3"),
User(id=8, name="u4"),
)
s.query(User).filter(User.id.in_([7, 8])).all()
s.close()
return s, [u1, u2, u3, u4]
def test_single_entity(self):
s, (u1, u2, u3, u4) = self._fixture()
User = self.classes.User
q = s.query(User)
collection = [u1, u2, u3, u4]
it = loading.merge_result(q, collection)
eq_([x.id for x in it], [1, 2, 7, 8])
def test_single_entity_frozen(self):
s = fixture_session()
User = self.classes.User
stmt = select(User).where(User.id.in_([7, 8, 9])).order_by(User.id)
result = s.execute(stmt)
it = loading.merge_frozen_result(s, stmt, result.freeze())
eq_([x.id for x in it().scalars()], [7, 8, 9])
def test_single_column(self):
User = self.classes.User
s = fixture_session()
q = s.query(User.id)
collection = [(1,), (2,), (7,), (8,)]
it = loading.merge_result(q, collection)
eq_(list(it), [(1,), (2,), (7,), (8,)])
def test_single_column_frozen(self):
User = self.classes.User
s = fixture_session()
stmt = select(User.id).where(User.id.in_([7, 8, 9])).order_by(User.id)
result = s.execute(stmt)
it = loading.merge_frozen_result(s, stmt, result.freeze())
eq_([x.id for x in it()], [7, 8, 9])
def test_entity_col_mix_plain_tuple(self):
s, (u1, u2, u3, u4) = self._fixture()
User = self.classes.User
q = s.query(User, User.id)
collection = [(u1, 1), (u2, 2), (u3, 7), (u4, 8)]
it = loading.merge_result(q, collection)
it = list(it)
eq_([(x.id, y) for x, y in it], [(1, 1), (2, 2), (7, 7), (8, 8)])
eq_(list(it[0]._mapping.keys()), ["User", "id"])
def test_entity_col_mix_plain_tuple_frozen(self):
s = fixture_session()
User = self.classes.User
stmt = (
select(User, User.id)
.where(User.id.in_([7, 8, 9]))
.order_by(User.id)
)
result = s.execute(stmt)
it = loading.merge_frozen_result(s, stmt, result.freeze())
it = list(it())
eq_([(x.id, y) for x, y in it], [(7, 7), (8, 8), (9, 9)])
eq_(list(it[0]._mapping.keys()), ["User", "id"])
def test_entity_col_mix_keyed_tuple(self):
s, (u1, u2, u3, u4) = self._fixture()
User = self.classes.User
q = s.query(User, User.id)
row = result_tuple(["User", "id"])
def kt(*x):
return row(x)
collection = [kt(u1, 1), kt(u2, 2), kt(u3, 7), kt(u4, 8)]
it = loading.merge_result(q, collection)
it = list(it)
eq_([(x.id, y) for x, y in it], [(1, 1), (2, 2), (7, 7), (8, 8)])
eq_(list(it[0]._mapping.keys()), ["User", "id"])
def test_none_entity(self):
s, (u1, u2, u3, u4) = self._fixture()
User = self.classes.User
ua = aliased(User)
q = s.query(User, ua)
row = result_tuple(["User", "useralias"])
def kt(*x):
return row(x)
collection = [kt(u1, u2), kt(u1, None), kt(u2, u3)]
it = loading.merge_result(q, collection)
eq_(
[(x and x.id or None, y and y.id or None) for x, y in it],
[(u1.id, u2.id), (u1.id, None), (u2.id, u3.id)],
)
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