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from sqlalchemy import ForeignKey
from sqlalchemy import Integer
from sqlalchemy import testing
from sqlalchemy.orm import attributes
from sqlalchemy.orm import class_mapper
from sqlalchemy.orm import exc as orm_exc
from sqlalchemy.orm import sync
from sqlalchemy.orm import unitofwork
from sqlalchemy.testing import assert_raises_message
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
from sqlalchemy.testing.fixtures import fixture_session
from sqlalchemy.testing.schema import Column
from sqlalchemy.testing.schema import Table
class AssertsUOW:
def _get_test_uow(self, session):
uow = unitofwork.UOWTransaction(session)
deleted = set(session._deleted)
new = set(session._new)
dirty = set(session._dirty_states).difference(deleted)
for s in new.union(dirty):
uow.register_object(s)
for d in deleted:
uow.register_object(d, isdelete=True)
return uow
class SyncTest(
fixtures.MappedTest, testing.AssertsExecutionResults, AssertsUOW
):
@classmethod
def define_tables(cls, metadata):
Table(
"t1",
metadata,
Column("id", Integer, primary_key=True),
Column("foo", Integer),
)
Table(
"t2",
metadata,
Column("id", Integer, ForeignKey("t1.id"), primary_key=True),
Column("t1id", Integer, ForeignKey("t1.id")),
)
@classmethod
def setup_classes(cls):
class A(cls.Basic):
pass
class B(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
cls.mapper_registry.map_imperatively(cls.classes.A, cls.tables.t1)
cls.mapper_registry.map_imperatively(cls.classes.B, cls.tables.t2)
def _fixture(self):
A, B = self.classes.A, self.classes.B
session = fixture_session()
uowcommit = self._get_test_uow(session)
a_mapper = class_mapper(A)
b_mapper = class_mapper(B)
self.a1 = a1 = A()
self.b1 = b1 = B()
uowcommit = self._get_test_uow(session)
return (
uowcommit,
attributes.instance_state(a1),
attributes.instance_state(b1),
a_mapper,
b_mapper,
)
def test_populate(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, b_mapper.c.id)]
a1.obj().id = 7
assert "id" not in b1.obj().__dict__
sync.populate(a1, a_mapper, b1, b_mapper, pairs, uowcommit, False)
eq_(b1.obj().id, 7)
eq_(b1.obj().__dict__["id"], 7)
assert ("pk_cascaded", b1, b_mapper.c.id) not in uowcommit.attributes
def test_populate_flag_cascaded(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, b_mapper.c.id)]
a1.obj().id = 7
assert "id" not in b1.obj().__dict__
sync.populate(a1, a_mapper, b1, b_mapper, pairs, uowcommit, True)
eq_(b1.obj().id, 7)
eq_(b1.obj().__dict__["id"], 7)
eq_(uowcommit.attributes[("pk_cascaded", b1, b_mapper.c.id)], True)
def test_populate_unmapped_source(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(b_mapper.c.id, b_mapper.c.id)]
assert_raises_message(
orm_exc.UnmappedColumnError,
"Can't execute sync rule for source column 't2.id'; "
r"mapper 'Mapper\[A\(t1\)\]' does not map this column.",
sync.populate,
a1,
a_mapper,
b1,
b_mapper,
pairs,
uowcommit,
False,
)
def test_populate_unmapped_dest(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, a_mapper.c.id)]
assert_raises_message(
orm_exc.UnmappedColumnError,
r"Can't execute sync rule for destination "
r"column 't1.id'; "
r"mapper 'Mapper\[B\(t2\)\]' does not map this column.",
sync.populate,
a1,
a_mapper,
b1,
b_mapper,
pairs,
uowcommit,
False,
)
def test_clear(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, b_mapper.c.t1id)]
b1.obj().t1id = 8
eq_(b1.obj().__dict__["t1id"], 8)
sync.clear(b1, b_mapper, pairs)
eq_(b1.obj().__dict__["t1id"], None)
def test_clear_pk(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, b_mapper.c.id)]
b1.obj().id = 8
eq_(b1.obj().__dict__["id"], 8)
assert_raises_message(
AssertionError,
"Dependency rule tried to blank-out primary key "
"column 't2.id' on instance '<B",
sync.clear,
b1,
b_mapper,
pairs,
)
def test_clear_unmapped(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(a_mapper.c.id, a_mapper.c.foo)]
assert_raises_message(
orm_exc.UnmappedColumnError,
"Can't execute sync rule for destination "
r"column 't1.foo'; mapper 'Mapper\[B\(t2\)\]' does not "
"map this column.",
sync.clear,
b1,
b_mapper,
pairs,
)
def test_update(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().id = 10
a1._commit_all(a1.dict)
a1.obj().id = 12
pairs = [(a_mapper.c.id, b_mapper.c.id)]
dest = {}
sync.update(a1, a_mapper, dest, "old_", pairs)
eq_(dest, {"id": 12, "old_id": 10})
def test_update_unmapped(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(b_mapper.c.id, b_mapper.c.id)]
dest = {}
assert_raises_message(
orm_exc.UnmappedColumnError,
"Can't execute sync rule for source column 't2.id'; "
r"mapper 'Mapper\[A\(t1\)\]' does not map this column.",
sync.update,
a1,
a_mapper,
dest,
"old_",
pairs,
)
def test_populate_dict(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().id = 10
pairs = [(a_mapper.c.id, b_mapper.c.id)]
dest = {}
sync.populate_dict(a1, a_mapper, dest, pairs)
eq_(dest, {"id": 10})
def test_populate_dict_unmapped(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().id = 10
pairs = [(b_mapper.c.id, b_mapper.c.id)]
dest = {}
assert_raises_message(
orm_exc.UnmappedColumnError,
"Can't execute sync rule for source column 't2.id'; "
r"mapper 'Mapper\[A\(t1\)\]' does not map this column.",
sync.populate_dict,
a1,
a_mapper,
dest,
pairs,
)
def test_source_modified_unmodified(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().id = 10
pairs = [(a_mapper.c.id, b_mapper.c.id)]
eq_(sync.source_modified(uowcommit, a1, a_mapper, pairs), False)
def test_source_modified_no_pairs(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
eq_(sync.source_modified(uowcommit, a1, a_mapper, []), False)
def test_source_modified_modified(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().id = 10
a1._commit_all(a1.dict)
a1.obj().id = 12
pairs = [(a_mapper.c.id, b_mapper.c.id)]
eq_(sync.source_modified(uowcommit, a1, a_mapper, pairs), True)
def test_source_modified_composite(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().foo = 10
a1._commit_all(a1.dict)
a1.obj().foo = 12
pairs = [
(a_mapper.c.id, b_mapper.c.id),
(a_mapper.c.foo, b_mapper.c.id),
]
eq_(sync.source_modified(uowcommit, a1, a_mapper, pairs), True)
def test_source_modified_composite_unmodified(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
a1.obj().foo = 10
a1._commit_all(a1.dict)
pairs = [
(a_mapper.c.id, b_mapper.c.id),
(a_mapper.c.foo, b_mapper.c.id),
]
eq_(sync.source_modified(uowcommit, a1, a_mapper, pairs), False)
def test_source_modified_no_unmapped(self):
uowcommit, a1, b1, a_mapper, b_mapper = self._fixture()
pairs = [(b_mapper.c.id, b_mapper.c.id)]
assert_raises_message(
orm_exc.UnmappedColumnError,
"Can't execute sync rule for source column 't2.id'; "
r"mapper 'Mapper\[A\(t1\)\]' does not map this column.",
sync.source_modified,
uowcommit,
a1,
a_mapper,
pairs,
)
|
