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from sqlalchemy import Integer, String, ForeignKey, func, desc, and_, or_
from sqlalchemy.orm import (
interfaces,
relationship,
mapper,
clear_mappers,
create_session,
joinedload,
joinedload_all,
subqueryload,
subqueryload_all,
polymorphic_union,
aliased,
class_mapper,
with_polymorphic,
)
from sqlalchemy import exc as sa_exc
from sqlalchemy.engine import default
from sqlalchemy.testing import AssertsCompiledSQL, fixtures
from sqlalchemy import testing
from sqlalchemy.testing.schema import Table, Column
from sqlalchemy.testing import assert_raises, eq_
from ._poly_fixtures import (
Company,
Person,
Engineer,
Manager,
Boss,
Machine,
Paperwork,
_PolymorphicFixtureBase,
_Polymorphic,
_PolymorphicPolymorphic,
_PolymorphicUnions,
_PolymorphicJoins,
_PolymorphicAliasedJoins,
)
class _WithPolymorphicBase(_PolymorphicFixtureBase):
def test_join_base_to_sub(self):
sess = create_session()
pa = with_polymorphic(Person, [Engineer])
def go():
eq_(
sess.query(pa)
.filter(pa.Engineer.primary_language == "java")
.all(),
self._emps_wo_relationships_fixture()[0:1],
)
self.assert_sql_count(testing.db, go, 1)
def test_col_expression_base_plus_two_subs(self):
sess = create_session()
pa = with_polymorphic(Person, [Engineer, Manager])
eq_(
sess.query(
pa.name, pa.Engineer.primary_language, pa.Manager.manager_name
)
.filter(
or_(
pa.Engineer.primary_language == "java",
pa.Manager.manager_name == "dogbert",
)
)
.order_by(pa.Engineer.type)
.all(),
[("dilbert", "java", None), ("dogbert", None, "dogbert")],
)
def test_join_to_join_entities(self):
sess = create_session()
pa = with_polymorphic(Person, [Engineer])
pa_alias = with_polymorphic(Person, [Engineer], aliased=True)
eq_(
[
(p1.name, type(p1), p2.name, type(p2))
for (p1, p2) in sess.query(pa, pa_alias)
.join(
pa_alias,
or_(
pa.Engineer.primary_language
== pa_alias.Engineer.primary_language,
and_(
pa.Engineer.primary_language == None, # noqa
pa_alias.Engineer.primary_language == None,
pa.person_id > pa_alias.person_id,
),
),
)
.order_by(pa.name, pa_alias.name)
],
[
("dilbert", Engineer, "dilbert", Engineer),
("dogbert", Manager, "pointy haired boss", Boss),
("vlad", Engineer, "vlad", Engineer),
("wally", Engineer, "wally", Engineer),
],
)
def test_join_to_join_columns(self):
sess = create_session()
pa = with_polymorphic(Person, [Engineer])
pa_alias = with_polymorphic(Person, [Engineer], aliased=True)
eq_(
[
row
for row in sess.query(
pa.name,
pa.Engineer.primary_language,
pa_alias.name,
pa_alias.Engineer.primary_language,
)
.join(
pa_alias,
or_(
pa.Engineer.primary_language
== pa_alias.Engineer.primary_language,
and_(
pa.Engineer.primary_language == None, # noqa
pa_alias.Engineer.primary_language == None,
pa.person_id > pa_alias.person_id,
),
),
)
.order_by(pa.name, pa_alias.name)
],
[
("dilbert", "java", "dilbert", "java"),
("dogbert", None, "pointy haired boss", None),
("vlad", "cobol", "vlad", "cobol"),
("wally", "c++", "wally", "c++"),
],
)
class PolymorphicTest(_WithPolymorphicBase, _Polymorphic):
pass
class PolymorphicPolymorphicTest(
_WithPolymorphicBase, _PolymorphicPolymorphic
):
pass
class PolymorphicUnionsTest(_WithPolymorphicBase, _PolymorphicUnions):
pass
class PolymorphicAliasedJoinsTest(
_WithPolymorphicBase, _PolymorphicAliasedJoins
):
pass
class PolymorphicJoinsTest(_WithPolymorphicBase, _PolymorphicJoins):
pass
|
