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from sqlalchemy import exc
from sqlalchemy import select
from sqlalchemy.orm import aliased
from sqlalchemy.orm import loading
from sqlalchemy.orm import Session
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.util import KeyedTuple
from . import _fixtures
# class GetFromIdentityTest(_fixtures.FixtureTest):
# class LoadOnIdentTest(_fixtures.FixtureTest):
# class InstanceProcessorTest(_fixture.FixtureTest):
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 = Session()
q = s.query(User)
ctx = q._compile_context()
cursor = mock.Mock()
q._entities = [
mock.Mock(row_processor=mock.Mock(side_effect=Exception("boom")))
]
assert_raises(Exception, list, loading.instances(q, cursor, ctx))
assert cursor.close.called, "Cursor wasn't closed"
def test_row_proc_not_created(self):
User = self.classes.User
s = 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 = 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_column(self):
User = self.classes.User
s = 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_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].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)
def kt(*x):
return KeyedTuple(x, ["User", "id"])
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].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)
def kt(*x):
return KeyedTuple(x, ["User", "useralias"])
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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