mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-28 19:44:50 -04:00
Mike Bayer
94a089bc2b
a with_polymorphic, regardless of inheritance type, represents multiple classes. A subclass that wants to joinedload with innerjoin=True needs to be demoted to an outerjoin because the parent entity rows might not be of that type. Looks more intuitive with a joined inheritance load, but applies just as well to single or concrete. Change-Id: I4d3d76106ae20032269f8848aad70a8e2f9422f9 Fixes: #3988
2094 lines
68 KiB
Python
2094 lines
68 KiB
Python
from sqlalchemy.orm import create_session, relationship, mapper, \
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contains_eager, joinedload, subqueryload, subqueryload_all,\
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Session, aliased, with_polymorphic, joinedload_all, backref
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from sqlalchemy import Integer, String, ForeignKey, select, func
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from sqlalchemy.engine import default
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from sqlalchemy.testing import AssertsCompiledSQL, fixtures
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from sqlalchemy import testing
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from sqlalchemy.testing.schema import Table, Column
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from sqlalchemy.testing import assert_raises, eq_, is_
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class Company(fixtures.ComparableEntity):
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pass
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class Person(fixtures.ComparableEntity):
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pass
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class Engineer(Person):
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pass
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class Manager(Person):
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pass
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class Boss(Manager):
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pass
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class Machine(fixtures.ComparableEntity):
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pass
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class Paperwork(fixtures.ComparableEntity):
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pass
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class SelfReferentialTestJoinedToBase(fixtures.MappedTest):
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run_setup_mappers = 'once'
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@classmethod
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def define_tables(cls, metadata):
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Table('people', metadata,
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Column('person_id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(30)))
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Table('engineers', metadata,
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Column('person_id', Integer,
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ForeignKey('people.person_id'),
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primary_key=True),
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Column('primary_language', String(50)),
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Column('reports_to_id', Integer,
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ForeignKey('people.person_id')))
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@classmethod
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def setup_mappers(cls):
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engineers, people = cls.tables.engineers, cls.tables.people
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mapper(Person, people,
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polymorphic_on=people.c.type,
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polymorphic_identity='person')
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mapper(Engineer, engineers,
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inherits=Person,
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inherit_condition=engineers.c.person_id == people.c.person_id,
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polymorphic_identity='engineer',
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properties={
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'reports_to': relationship(
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Person,
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primaryjoin=(
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people.c.person_id == engineers.c.reports_to_id))})
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def test_has(self):
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p1 = Person(name='dogbert')
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e1 = Engineer(name='dilbert', primary_language='java', reports_to=p1)
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sess = create_session()
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sess.add(p1)
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sess.add(e1)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Engineer)
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.filter(Engineer.reports_to.has(Person.name == 'dogbert'))
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.first(),
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Engineer(name='dilbert'))
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def test_oftype_aliases_in_exists(self):
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e1 = Engineer(name='dilbert', primary_language='java')
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e2 = Engineer(name='wally', primary_language='c++', reports_to=e1)
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sess = create_session()
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sess.add_all([e1, e2])
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sess.flush()
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eq_(sess.query(Engineer)
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.filter(Engineer.reports_to
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.of_type(Engineer)
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.has(Engineer.name == 'dilbert'))
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.first(),
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e2)
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def test_join(self):
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p1 = Person(name='dogbert')
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e1 = Engineer(name='dilbert', primary_language='java', reports_to=p1)
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sess = create_session()
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sess.add(p1)
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sess.add(e1)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Engineer)
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.join('reports_to', aliased=True)
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.filter(Person.name == 'dogbert').first(),
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Engineer(name='dilbert'))
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class SelfReferentialJ2JTest(fixtures.MappedTest):
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run_setup_mappers = 'once'
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@classmethod
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def define_tables(cls, metadata):
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people = Table('people', metadata,
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Column('person_id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(30)))
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engineers = Table('engineers', metadata,
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Column('person_id', Integer,
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ForeignKey('people.person_id'),
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primary_key=True),
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Column('primary_language', String(50)),
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Column('reports_to_id', Integer,
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ForeignKey('managers.person_id')))
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managers = Table('managers', metadata,
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Column('person_id', Integer,
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ForeignKey('people.person_id'),
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primary_key=True),)
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@classmethod
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def setup_mappers(cls):
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engineers = cls.tables.engineers
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managers = cls.tables.managers
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people = cls.tables.people
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mapper(Person, people,
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polymorphic_on=people.c.type,
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polymorphic_identity='person')
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mapper(Manager, managers,
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inherits=Person,
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polymorphic_identity='manager')
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mapper(Engineer, engineers,
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inherits=Person,
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polymorphic_identity='engineer',
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properties={
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'reports_to': relationship(
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Manager,
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primaryjoin=(
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managers.c.person_id == engineers.c.reports_to_id),
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backref='engineers')})
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def test_has(self):
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m1 = Manager(name='dogbert')
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e1 = Engineer(name='dilbert', primary_language='java', reports_to=m1)
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sess = create_session()
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sess.add(m1)
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sess.add(e1)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Engineer)
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.filter(Engineer.reports_to.has(Manager.name == 'dogbert'))
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.first(),
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Engineer(name='dilbert'))
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def test_join(self):
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m1 = Manager(name='dogbert')
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e1 = Engineer(name='dilbert', primary_language='java', reports_to=m1)
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sess = create_session()
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sess.add(m1)
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sess.add(e1)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Engineer)
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.join('reports_to', aliased=True)
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.filter(Manager.name == 'dogbert').first(),
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Engineer(name='dilbert'))
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def test_filter_aliasing(self):
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m1 = Manager(name='dogbert')
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m2 = Manager(name='foo')
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e1 = Engineer(name='wally', primary_language='java', reports_to=m1)
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e2 = Engineer(name='dilbert', primary_language='c++', reports_to=m2)
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e3 = Engineer(name='etc', primary_language='c++')
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sess = create_session()
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sess.add_all([m1, m2, e1, e2, e3])
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sess.flush()
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sess.expunge_all()
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# filter aliasing applied to Engineer doesn't whack Manager
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eq_(sess.query(Manager)
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.join(Manager.engineers)
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.filter(Manager.name == 'dogbert').all(),
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[m1])
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eq_(sess.query(Manager)
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.join(Manager.engineers)
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.filter(Engineer.name == 'dilbert').all(),
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[m2])
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eq_(sess.query(Manager, Engineer)
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.join(Manager.engineers)
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.order_by(Manager.name.desc()).all(),
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[(m2, e2), (m1, e1)])
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def test_relationship_compare(self):
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m1 = Manager(name='dogbert')
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m2 = Manager(name='foo')
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e1 = Engineer(name='dilbert', primary_language='java', reports_to=m1)
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e2 = Engineer(name='wally', primary_language='c++', reports_to=m2)
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e3 = Engineer(name='etc', primary_language='c++')
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sess = create_session()
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sess.add(m1)
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sess.add(m2)
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sess.add(e1)
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sess.add(e2)
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sess.add(e3)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(Manager)
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.join(Manager.engineers)
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.filter(Engineer.reports_to == None).all(), # noqa
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[])
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eq_(sess.query(Manager)
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.join(Manager.engineers)
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.filter(Engineer.reports_to == m1).all(),
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[m1])
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class SelfReferentialJ2JSelfTest(fixtures.MappedTest):
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run_setup_mappers = 'once'
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@classmethod
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def define_tables(cls, metadata):
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people = Table('people', metadata,
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Column('person_id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(30)))
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engineers = Table('engineers', metadata,
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Column('person_id', Integer,
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ForeignKey('people.person_id'),
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primary_key=True),
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Column('reports_to_id', Integer,
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ForeignKey('engineers.person_id')))
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@classmethod
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def setup_mappers(cls):
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engineers = cls.tables.engineers
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people = cls.tables.people
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mapper(Person, people,
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polymorphic_on=people.c.type,
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polymorphic_identity='person')
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mapper(Engineer, engineers,
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inherits=Person,
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polymorphic_identity='engineer',
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properties={
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'reports_to': relationship(
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Engineer,
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primaryjoin=(
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engineers.c.person_id == engineers.c.reports_to_id),
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backref='engineers',
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remote_side=engineers.c.person_id)})
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def _two_obj_fixture(self):
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e1 = Engineer(name='wally')
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e2 = Engineer(name='dilbert', reports_to=e1)
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sess = Session()
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sess.add_all([e1, e2])
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sess.commit()
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return sess
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def _five_obj_fixture(self):
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sess = Session()
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e1, e2, e3, e4, e5 = [
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Engineer(name='e%d' % (i + 1)) for i in range(5)
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]
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e3.reports_to = e1
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e4.reports_to = e2
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sess.add_all([e1, e2, e3, e4, e5])
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sess.commit()
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return sess
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def test_has(self):
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sess = self._two_obj_fixture()
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eq_(sess.query(Engineer)
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.filter(Engineer.reports_to.has(Engineer.name == 'wally'))
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.first(),
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Engineer(name='dilbert'))
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def test_join_explicit_alias(self):
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sess = self._five_obj_fixture()
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ea = aliased(Engineer)
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eq_(sess.query(Engineer)
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.join(ea, Engineer.engineers)
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.filter(Engineer.name == 'e1').all(),
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[Engineer(name='e1')])
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def test_join_aliased_flag_one(self):
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sess = self._two_obj_fixture()
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eq_(sess.query(Engineer)
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.join('reports_to', aliased=True)
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.filter(Engineer.name == 'wally').first(),
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Engineer(name='dilbert'))
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def test_join_aliased_flag_two(self):
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sess = self._five_obj_fixture()
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eq_(sess.query(Engineer)
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.join(Engineer.engineers, aliased=True)
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.filter(Engineer.name == 'e4').all(),
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[Engineer(name='e2')])
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def test_relationship_compare(self):
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sess = self._five_obj_fixture()
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e1 = sess.query(Engineer).filter_by(name='e1').one()
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e2 = sess.query(Engineer).filter_by(name='e2').one()
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eq_(sess.query(Engineer)
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.join(Engineer.engineers, aliased=True)
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.filter(Engineer.reports_to == None).all(), # noqa
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[])
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eq_(sess.query(Engineer)
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.join(Engineer.engineers, aliased=True)
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.filter(Engineer.reports_to == e1).all(),
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[e1])
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eq_(sess.query(Engineer)
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.join(Engineer.engineers, aliased=True)
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.filter(Engineer.reports_to != None).all(), # noqa
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[e1, e2])
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class M2MFilterTest(fixtures.MappedTest):
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run_setup_mappers = 'once'
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run_inserts = 'once'
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run_deletes = None
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@classmethod
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def define_tables(cls, metadata):
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organizations = Table('organizations', metadata,
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Column('id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(50)))
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engineers_to_org = Table('engineers_to_org', metadata,
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Column('org_id', Integer,
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ForeignKey('organizations.id')),
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Column('engineer_id', Integer,
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ForeignKey('engineers.person_id')))
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people = Table('people', metadata,
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Column('person_id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(30)))
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engineers = Table('engineers', metadata,
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Column('person_id', Integer,
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ForeignKey('people.person_id'),
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primary_key=True),
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Column('primary_language', String(50)))
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@classmethod
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def setup_mappers(cls):
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organizations = cls.tables.organizations
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people = cls.tables.people
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engineers = cls.tables.engineers
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engineers_to_org = cls.tables.engineers_to_org
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class Organization(cls.Comparable):
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pass
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mapper(Organization, organizations,
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properties={
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'engineers': relationship(
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Engineer,
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secondary=engineers_to_org,
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backref='organizations')})
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mapper(Person, people,
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polymorphic_on=people.c.type,
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polymorphic_identity='person')
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mapper(Engineer, engineers,
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inherits=Person,
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polymorphic_identity='engineer')
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@classmethod
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def insert_data(cls):
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Organization = cls.classes.Organization
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e1 = Engineer(name='e1')
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e2 = Engineer(name='e2')
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e3 = Engineer(name='e3')
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e4 = Engineer(name='e4')
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org1 = Organization(name='org1', engineers=[e1, e2])
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org2 = Organization(name='org2', engineers=[e3, e4])
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sess = create_session()
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sess.add(org1)
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sess.add(org2)
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sess.flush()
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def test_not_contains(self):
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Organization = self.classes.Organization
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sess = create_session()
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e1 = sess.query(Person).filter(Engineer.name == 'e1').one()
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eq_(sess.query(Organization)
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.filter(~Organization.engineers
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.of_type(Engineer)
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.contains(e1))
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.all(),
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[Organization(name='org2')])
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# this had a bug
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eq_(sess.query(Organization)
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.filter(~Organization.engineers
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.contains(e1))
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.all(),
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[Organization(name='org2')])
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def test_any(self):
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sess = create_session()
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Organization = self.classes.Organization
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eq_(sess.query(Organization)
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.filter(Organization.engineers
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.of_type(Engineer)
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.any(Engineer.name == 'e1'))
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.all(),
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[Organization(name='org1')])
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eq_(sess.query(Organization)
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.filter(Organization.engineers
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.any(Engineer.name == 'e1'))
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.all(),
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[Organization(name='org1')])
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class SelfReferentialM2MTest(fixtures.MappedTest, AssertsCompiledSQL):
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__dialect__ = "default"
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@classmethod
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def define_tables(cls, metadata):
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Table('secondary', metadata,
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Column('left_id', Integer,
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ForeignKey('parent.id'),
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nullable=False),
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Column('right_id', Integer,
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ForeignKey('parent.id'),
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nullable=False))
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Table('parent', metadata,
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Column('id', Integer,
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primary_key=True,
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test_needs_autoincrement=True),
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Column('cls', String(50)))
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Table('child1', metadata,
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Column('id', Integer,
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ForeignKey('parent.id'),
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primary_key=True))
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Table('child2', metadata,
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Column('id', Integer,
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ForeignKey('parent.id'),
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primary_key=True))
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@classmethod
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def setup_classes(cls):
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class Parent(cls.Basic):
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pass
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class Child1(Parent):
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pass
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class Child2(Parent):
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pass
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@classmethod
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def setup_mappers(cls):
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child1 = cls.tables.child1
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child2 = cls.tables.child2
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Parent = cls.classes.Parent
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parent = cls.tables.parent
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Child1 = cls.classes.Child1
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Child2 = cls.classes.Child2
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secondary = cls.tables.secondary
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mapper(Parent, parent,
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polymorphic_on=parent.c.cls)
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mapper(Child1, child1,
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inherits=Parent,
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polymorphic_identity='child1',
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properties={
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'left_child2': relationship(
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Child2,
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secondary=secondary,
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primaryjoin=parent.c.id == secondary.c.right_id,
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secondaryjoin=parent.c.id == secondary.c.left_id,
|
|
uselist=False,
|
|
backref="right_children")})
|
|
|
|
mapper(Child2, child2,
|
|
inherits=Parent,
|
|
polymorphic_identity='child2')
|
|
|
|
def test_query_crit(self):
|
|
Child1, Child2 = self.classes.Child1, self.classes.Child2
|
|
sess = create_session()
|
|
c11, c12, c13 = Child1(), Child1(), Child1()
|
|
c21, c22, c23 = Child2(), Child2(), Child2()
|
|
c11.left_child2 = c22
|
|
c12.left_child2 = c22
|
|
c13.left_child2 = c23
|
|
sess.add_all([c11, c12, c13, c21, c22, c23])
|
|
sess.flush()
|
|
|
|
# test that the join to Child2 doesn't alias Child1 in the select
|
|
eq_(set(sess.query(Child1).join(Child1.left_child2)),
|
|
set([c11, c12, c13]))
|
|
|
|
eq_(set(sess.query(Child1, Child2).join(Child1.left_child2)),
|
|
set([(c11, c22), (c12, c22), (c13, c23)]))
|
|
|
|
# test __eq__() on property is annotating correctly
|
|
eq_(set(sess.query(Child2)
|
|
.join(Child2.right_children)
|
|
.filter(Child1.left_child2 == c22)),
|
|
set([c22]))
|
|
|
|
# test the same again
|
|
self.assert_compile(
|
|
sess.query(Child2).join(Child2.right_children).
|
|
filter(Child1.left_child2 == c22).with_labels().statement,
|
|
"SELECT child2.id AS child2_id, parent.id AS parent_id, "
|
|
"parent.cls AS parent_cls FROM secondary AS secondary_1, "
|
|
"parent JOIN child2 ON parent.id = child2.id JOIN secondary AS "
|
|
"secondary_2 ON parent.id = secondary_2.left_id JOIN "
|
|
"(parent AS parent_1 JOIN child1 AS child1_1 "
|
|
"ON parent_1.id = child1_1.id) "
|
|
"ON parent_1.id = secondary_2.right_id WHERE "
|
|
"parent_1.id = secondary_1.right_id AND :param_1 = "
|
|
"secondary_1.left_id")
|
|
|
|
def test_eager_join(self):
|
|
Child1, Child2 = self.classes.Child1, self.classes.Child2
|
|
sess = create_session()
|
|
c1 = Child1()
|
|
c1.left_child2 = Child2()
|
|
sess.add(c1)
|
|
sess.flush()
|
|
|
|
# test that the splicing of the join works here, doesn't break in
|
|
# the middle of "parent join child1"
|
|
q = sess.query(Child1).options(joinedload('left_child2'))
|
|
self.assert_compile(
|
|
q.limit(1).with_labels().statement,
|
|
"SELECT child1.id AS child1_id, parent.id AS parent_id, "
|
|
"parent.cls AS parent_cls, child2_1.id AS child2_1_id, "
|
|
"parent_1.id AS parent_1_id, parent_1.cls AS parent_1_cls "
|
|
"FROM parent JOIN child1 ON parent.id = child1.id "
|
|
"LEFT OUTER JOIN (secondary AS secondary_1 JOIN "
|
|
"(parent AS parent_1 JOIN child2 AS child2_1 "
|
|
"ON parent_1.id = child2_1.id) "
|
|
"ON parent_1.id = secondary_1.left_id) "
|
|
"ON parent.id = secondary_1.right_id "
|
|
"LIMIT :param_1",
|
|
checkparams={'param_1': 1}
|
|
)
|
|
|
|
# another way to check
|
|
eq_(
|
|
select([func.count('*')]).select_from(
|
|
q.limit(1).with_labels().subquery()
|
|
).scalar(),
|
|
1
|
|
)
|
|
assert q.first() is c1
|
|
|
|
def test_subquery_load(self):
|
|
Child1, Child2 = self.classes.Child1, self.classes.Child2
|
|
sess = create_session()
|
|
c1 = Child1()
|
|
c1.left_child2 = Child2()
|
|
sess.add(c1)
|
|
sess.flush()
|
|
sess.expunge_all()
|
|
|
|
query_ = sess.query(Child1).options(subqueryload('left_child2'))
|
|
for row in query_.all():
|
|
assert row.left_child2
|
|
|
|
|
|
class EagerToSubclassTest(fixtures.MappedTest):
|
|
"""Test eager loads to subclass mappers"""
|
|
|
|
run_setup_classes = 'once'
|
|
run_setup_mappers = 'once'
|
|
run_inserts = 'once'
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('parent', metadata,
|
|
Column('id', Integer,
|
|
primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('data', String(10)))
|
|
|
|
Table('base', metadata,
|
|
Column('id', Integer,
|
|
primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('type', String(10)),
|
|
Column('related_id', Integer,
|
|
ForeignKey('related.id')))
|
|
|
|
Table('sub', metadata,
|
|
Column('id', Integer,
|
|
ForeignKey('base.id'),
|
|
primary_key=True),
|
|
Column('data', String(10)),
|
|
Column('parent_id', Integer,
|
|
ForeignKey('parent.id'),
|
|
nullable=False))
|
|
|
|
Table('related', metadata,
|
|
Column('id', Integer,
|
|
primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('data', String(10)))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class Parent(cls.Comparable):
|
|
pass
|
|
|
|
class Base(cls.Comparable):
|
|
pass
|
|
|
|
class Sub(Base):
|
|
pass
|
|
|
|
class Related(cls.Comparable):
|
|
pass
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
sub = cls.tables.sub
|
|
Sub = cls.classes.Sub
|
|
base = cls.tables.base
|
|
Base = cls.classes.Base
|
|
parent = cls.tables.parent
|
|
Parent = cls.classes.Parent
|
|
related = cls.tables.related
|
|
Related = cls.classes.Related
|
|
|
|
mapper(Parent, parent,
|
|
properties={'children': relationship(Sub, order_by=sub.c.data)})
|
|
|
|
mapper(Base, base,
|
|
polymorphic_on=base.c.type,
|
|
polymorphic_identity='b',
|
|
properties={'related': relationship(Related)})
|
|
|
|
mapper(Sub, sub,
|
|
inherits=Base,
|
|
polymorphic_identity='s')
|
|
|
|
mapper(Related, related)
|
|
|
|
@classmethod
|
|
def insert_data(cls):
|
|
global p1, p2
|
|
|
|
Parent = cls.classes.Parent
|
|
Sub = cls.classes.Sub
|
|
Related = cls.classes.Related
|
|
sess = Session()
|
|
r1, r2 = Related(data='r1'), Related(data='r2')
|
|
s1 = Sub(data='s1', related=r1)
|
|
s2 = Sub(data='s2', related=r2)
|
|
s3 = Sub(data='s3')
|
|
s4 = Sub(data='s4', related=r2)
|
|
s5 = Sub(data='s5')
|
|
p1 = Parent(data='p1', children=[s1, s2, s3])
|
|
p2 = Parent(data='p2', children=[s4, s5])
|
|
sess.add(p1)
|
|
sess.add(p2)
|
|
sess.commit()
|
|
|
|
def test_joinedload(self):
|
|
Parent = self.classes.Parent
|
|
sess = Session()
|
|
|
|
def go():
|
|
eq_(sess.query(Parent)
|
|
.options(joinedload(Parent.children)).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
def test_contains_eager(self):
|
|
Parent = self.classes.Parent
|
|
Sub = self.classes.Sub
|
|
sess = Session()
|
|
|
|
def go():
|
|
eq_(sess.query(Parent)
|
|
.join(Parent.children)
|
|
.options(contains_eager(Parent.children))
|
|
.order_by(Parent.data, Sub.data).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
def test_subq_through_related(self):
|
|
Parent = self.classes.Parent
|
|
Base = self.classes.Base
|
|
sess = Session()
|
|
|
|
def go():
|
|
eq_(sess.query(Parent)
|
|
.options(subqueryload_all(Parent.children, Base.related))
|
|
.order_by(Parent.data).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 3)
|
|
|
|
def test_subq_through_related_aliased(self):
|
|
Parent = self.classes.Parent
|
|
Base = self.classes.Base
|
|
pa = aliased(Parent)
|
|
sess = Session()
|
|
|
|
def go():
|
|
eq_(sess.query(pa)
|
|
.options(subqueryload_all(pa.children, Base.related))
|
|
.order_by(pa.data).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 3)
|
|
|
|
|
|
class SubClassEagerToSubClassTest(fixtures.MappedTest):
|
|
"""Test joinedloads from subclass to subclass mappers"""
|
|
|
|
run_setup_classes = 'once'
|
|
run_setup_mappers = 'once'
|
|
run_inserts = 'once'
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('parent', metadata,
|
|
Column('id', Integer,
|
|
primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('type', String(10)))
|
|
|
|
Table('subparent', metadata,
|
|
Column('id', Integer,
|
|
ForeignKey('parent.id'),
|
|
primary_key=True),
|
|
Column('data', String(10)))
|
|
|
|
Table('base', metadata,
|
|
Column('id', Integer,
|
|
primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('type', String(10)))
|
|
|
|
Table('sub', metadata,
|
|
Column('id', Integer,
|
|
ForeignKey('base.id'),
|
|
primary_key=True),
|
|
Column('data', String(10)),
|
|
Column('subparent_id', Integer,
|
|
ForeignKey('subparent.id'),
|
|
nullable=False))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class Parent(cls.Comparable):
|
|
pass
|
|
|
|
class Subparent(Parent):
|
|
pass
|
|
|
|
class Base(cls.Comparable):
|
|
pass
|
|
|
|
class Sub(Base):
|
|
pass
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
sub = cls.tables.sub
|
|
Sub = cls.classes.Sub
|
|
base = cls.tables.base
|
|
Base = cls.classes.Base
|
|
parent = cls.tables.parent
|
|
Parent = cls.classes.Parent
|
|
subparent = cls.tables.subparent
|
|
Subparent = cls.classes.Subparent
|
|
|
|
mapper(Parent, parent,
|
|
polymorphic_on=parent.c.type,
|
|
polymorphic_identity='b')
|
|
|
|
mapper(Subparent, subparent,
|
|
inherits=Parent,
|
|
polymorphic_identity='s',
|
|
properties={
|
|
'children': relationship(Sub, order_by=base.c.id)})
|
|
|
|
mapper(Base, base,
|
|
polymorphic_on=base.c.type,
|
|
polymorphic_identity='b')
|
|
|
|
mapper(Sub, sub,
|
|
inherits=Base,
|
|
polymorphic_identity='s')
|
|
|
|
@classmethod
|
|
def insert_data(cls):
|
|
global p1, p2
|
|
|
|
Sub, Subparent = cls.classes.Sub, cls.classes.Subparent
|
|
sess = create_session()
|
|
p1 = Subparent(
|
|
data='p1',
|
|
children=[Sub(data='s1'), Sub(data='s2'), Sub(data='s3')])
|
|
p2 = Subparent(
|
|
data='p2',
|
|
children=[Sub(data='s4'), Sub(data='s5')])
|
|
sess.add(p1)
|
|
sess.add(p2)
|
|
sess.flush()
|
|
|
|
def test_joinedload(self):
|
|
Subparent = self.classes.Subparent
|
|
|
|
sess = create_session()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.options(joinedload(Subparent.children)).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
sess.expunge_all()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.options(joinedload("children")).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
def test_contains_eager(self):
|
|
Subparent = self.classes.Subparent
|
|
|
|
sess = create_session()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.join(Subparent.children)
|
|
.options(contains_eager(Subparent.children)).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
sess.expunge_all()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.join(Subparent.children)
|
|
.options(contains_eager("children")).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
def test_subqueryload(self):
|
|
Subparent = self.classes.Subparent
|
|
|
|
sess = create_session()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.options(subqueryload(Subparent.children)).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 2)
|
|
|
|
sess.expunge_all()
|
|
|
|
def go():
|
|
eq_(sess.query(Subparent)
|
|
.options(subqueryload("children")).all(),
|
|
[p1, p2])
|
|
self.assert_sql_count(testing.db, go, 2)
|
|
|
|
|
|
class SameNamedPropTwoPolymorphicSubClassesTest(fixtures.MappedTest):
|
|
"""test pathing when two subclasses contain a different property
|
|
for the same name, and polymorphic loading is used.
|
|
|
|
#2614
|
|
|
|
"""
|
|
run_setup_classes = 'once'
|
|
run_setup_mappers = 'once'
|
|
run_inserts = 'once'
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('a', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('type', String(10)))
|
|
Table('b', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True))
|
|
Table('btod', metadata,
|
|
Column('bid', Integer, ForeignKey('b.id'), nullable=False),
|
|
Column('did', Integer, ForeignKey('d.id'), nullable=False)
|
|
)
|
|
Table('c', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True))
|
|
Table('ctod', metadata,
|
|
Column('cid', Integer, ForeignKey('c.id'), nullable=False),
|
|
Column('did', Integer, ForeignKey('d.id'), nullable=False))
|
|
Table('d', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class A(cls.Comparable):
|
|
pass
|
|
|
|
class B(A):
|
|
pass
|
|
|
|
class C(A):
|
|
pass
|
|
|
|
class D(cls.Comparable):
|
|
pass
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
A = cls.classes.A
|
|
B = cls.classes.B
|
|
C = cls.classes.C
|
|
D = cls.classes.D
|
|
|
|
mapper(A, cls.tables.a, polymorphic_on=cls.tables.a.c.type)
|
|
mapper(B, cls.tables.b, inherits=A, polymorphic_identity='b',
|
|
properties={
|
|
'related': relationship(D, secondary=cls.tables.btod)
|
|
})
|
|
mapper(C, cls.tables.c, inherits=A, polymorphic_identity='c',
|
|
properties={
|
|
'related': relationship(D, secondary=cls.tables.ctod)
|
|
})
|
|
mapper(D, cls.tables.d)
|
|
|
|
@classmethod
|
|
def insert_data(cls):
|
|
B = cls.classes.B
|
|
C = cls.classes.C
|
|
D = cls.classes.D
|
|
|
|
session = Session()
|
|
|
|
d = D()
|
|
session.add_all([
|
|
B(related=[d]),
|
|
C(related=[d])
|
|
])
|
|
session.commit()
|
|
|
|
def test_free_w_poly_subquery(self):
|
|
A = self.classes.A
|
|
B = self.classes.B
|
|
C = self.classes.C
|
|
D = self.classes.D
|
|
|
|
session = Session()
|
|
d = session.query(D).one()
|
|
a_poly = with_polymorphic(A, [B, C])
|
|
|
|
def go():
|
|
for a in session.query(a_poly).\
|
|
options(
|
|
subqueryload(a_poly.B.related),
|
|
subqueryload(a_poly.C.related)):
|
|
eq_(a.related, [d])
|
|
self.assert_sql_count(testing.db, go, 3)
|
|
|
|
def test_fixed_w_poly_subquery(self):
|
|
A = self.classes.A
|
|
B = self.classes.B
|
|
C = self.classes.C
|
|
D = self.classes.D
|
|
|
|
session = Session()
|
|
d = session.query(D).one()
|
|
|
|
def go():
|
|
for a in session.query(A).with_polymorphic([B, C]).\
|
|
options(subqueryload(B.related), subqueryload(C.related)):
|
|
eq_(a.related, [d])
|
|
self.assert_sql_count(testing.db, go, 3)
|
|
|
|
def test_free_w_poly_joined(self):
|
|
A = self.classes.A
|
|
B = self.classes.B
|
|
C = self.classes.C
|
|
D = self.classes.D
|
|
|
|
session = Session()
|
|
d = session.query(D).one()
|
|
a_poly = with_polymorphic(A, [B, C])
|
|
|
|
def go():
|
|
for a in session.query(a_poly).\
|
|
options(
|
|
joinedload(a_poly.B.related),
|
|
joinedload(a_poly.C.related)):
|
|
eq_(a.related, [d])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
def test_fixed_w_poly_joined(self):
|
|
A = self.classes.A
|
|
B = self.classes.B
|
|
C = self.classes.C
|
|
D = self.classes.D
|
|
|
|
session = Session()
|
|
d = session.query(D).one()
|
|
|
|
def go():
|
|
for a in session.query(A).with_polymorphic([B, C]).\
|
|
options(joinedload(B.related), joinedload(C.related)):
|
|
eq_(a.related, [d])
|
|
self.assert_sql_count(testing.db, go, 1)
|
|
|
|
|
|
class SubClassToSubClassFromParentTest(fixtures.MappedTest):
|
|
"""test #2617
|
|
|
|
"""
|
|
run_setup_classes = 'once'
|
|
run_setup_mappers = 'once'
|
|
run_inserts = 'once'
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('z', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True))
|
|
Table('a', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('type', String(10)),
|
|
Column('z_id', Integer, ForeignKey('z.id')))
|
|
Table('b', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True))
|
|
Table('d', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True),
|
|
Column('b_id', Integer, ForeignKey('b.id')))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class Z(cls.Comparable):
|
|
pass
|
|
|
|
class A(cls.Comparable):
|
|
pass
|
|
|
|
class B(A):
|
|
pass
|
|
|
|
class D(A):
|
|
pass
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
Z = cls.classes.Z
|
|
A = cls.classes.A
|
|
B = cls.classes.B
|
|
D = cls.classes.D
|
|
|
|
mapper(Z, cls.tables.z)
|
|
mapper(A, cls.tables.a, polymorphic_on=cls.tables.a.c.type,
|
|
with_polymorphic='*',
|
|
properties={
|
|
'zs': relationship(Z, lazy="subquery")
|
|
})
|
|
mapper(B, cls.tables.b, inherits=A, polymorphic_identity='b',
|
|
properties={
|
|
'related': relationship(D, lazy="subquery",
|
|
primaryjoin=cls.tables.d.c.b_id ==
|
|
cls.tables.b.c.id)
|
|
})
|
|
mapper(D, cls.tables.d, inherits=A, polymorphic_identity='d')
|
|
|
|
@classmethod
|
|
def insert_data(cls):
|
|
B = cls.classes.B
|
|
|
|
session = Session()
|
|
session.add(B())
|
|
session.commit()
|
|
|
|
def test_2617(self):
|
|
A = self.classes.A
|
|
session = Session()
|
|
|
|
def go():
|
|
a1 = session.query(A).first()
|
|
eq_(a1.related, [])
|
|
self.assert_sql_count(testing.db, go, 3)
|
|
|
|
|
|
class SubClassToSubClassMultiTest(AssertsCompiledSQL, fixtures.MappedTest):
|
|
"""
|
|
Two different joined-inh subclasses, led by a
|
|
parent, with two distinct endpoints:
|
|
|
|
parent -> subcl1 -> subcl2 -> (ep1, ep2)
|
|
|
|
the join to ep2 indicates we need to join
|
|
from the middle of the joinpoint, skipping ep1
|
|
|
|
"""
|
|
|
|
run_create_tables = None
|
|
run_deletes = None
|
|
__dialect__ = 'default'
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('parent', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('data', String(30)))
|
|
Table('base1', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('data', String(30)))
|
|
Table('sub1', metadata,
|
|
Column('id', Integer, ForeignKey('base1.id'), primary_key=True),
|
|
Column('parent_id', ForeignKey('parent.id')),
|
|
Column('subdata', String(30)))
|
|
|
|
Table('base2', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('base1_id', ForeignKey('base1.id')),
|
|
Column('data', String(30)))
|
|
Table('sub2', metadata,
|
|
Column('id', Integer, ForeignKey('base2.id'), primary_key=True),
|
|
Column('subdata', String(30)))
|
|
Table('ep1', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('base2_id', Integer, ForeignKey('base2.id')),
|
|
Column('data', String(30)))
|
|
Table('ep2', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('base2_id', Integer, ForeignKey('base2.id')),
|
|
Column('data', String(30)))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class Parent(cls.Comparable):
|
|
pass
|
|
|
|
class Base1(cls.Comparable):
|
|
pass
|
|
|
|
class Sub1(Base1):
|
|
pass
|
|
|
|
class Base2(cls.Comparable):
|
|
pass
|
|
|
|
class Sub2(Base2):
|
|
pass
|
|
|
|
class EP1(cls.Comparable):
|
|
pass
|
|
|
|
class EP2(cls.Comparable):
|
|
pass
|
|
|
|
@classmethod
|
|
def _classes(cls):
|
|
return cls.classes.Parent, cls.classes.Base1,\
|
|
cls.classes.Base2, cls.classes.Sub1,\
|
|
cls.classes.Sub2, cls.classes.EP1,\
|
|
cls.classes.EP2
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = cls._classes()
|
|
|
|
mapper(Parent, cls.tables.parent, properties={
|
|
'sub1': relationship(Sub1)
|
|
})
|
|
mapper(Base1, cls.tables.base1, properties={
|
|
'sub2': relationship(Sub2)
|
|
})
|
|
mapper(Sub1, cls.tables.sub1, inherits=Base1)
|
|
mapper(Base2, cls.tables.base2, properties={
|
|
'ep1': relationship(EP1),
|
|
'ep2': relationship(EP2)
|
|
})
|
|
mapper(Sub2, cls.tables.sub2, inherits=Base2)
|
|
mapper(EP1, cls.tables.ep1)
|
|
mapper(EP2, cls.tables.ep2)
|
|
|
|
def test_one(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Parent).join(Parent.sub1, Sub1.sub2).
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT parent.id AS parent_id, parent.data AS parent_data "
|
|
"FROM parent JOIN (base1 JOIN sub1 ON base1.id = sub1.id) "
|
|
"ON parent.id = sub1.parent_id JOIN "
|
|
"(base2 JOIN sub2 "
|
|
"ON base2.id = sub2.id) "
|
|
"ON base1.id = base2.base1_id "
|
|
"JOIN ep1 ON base2.id = ep1.base2_id "
|
|
"JOIN ep2 ON base2.id = ep2.base2_id"
|
|
)
|
|
|
|
def test_two(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s2a = aliased(Sub2, flat=True)
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Parent).join(Parent.sub1).
|
|
join(s2a, Sub1.sub2),
|
|
"SELECT parent.id AS parent_id, parent.data AS parent_data "
|
|
"FROM parent JOIN (base1 JOIN sub1 ON base1.id = sub1.id) "
|
|
"ON parent.id = sub1.parent_id JOIN "
|
|
"(base2 AS base2_1 JOIN sub2 AS sub2_1 "
|
|
"ON base2_1.id = sub2_1.id) "
|
|
"ON base1.id = base2_1.base1_id"
|
|
)
|
|
|
|
def test_three(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Base1).join(Base1.sub2).
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT base1.id AS base1_id, base1.data AS base1_data "
|
|
"FROM base1 JOIN (base2 JOIN sub2 "
|
|
"ON base2.id = sub2.id) ON base1.id = "
|
|
"base2.base1_id "
|
|
"JOIN ep1 ON base2.id = ep1.base2_id "
|
|
"JOIN ep2 ON base2.id = ep2.base2_id"
|
|
)
|
|
|
|
def test_four(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Sub2).join(Base1, Base1.id == Sub2.base1_id).
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT sub2.id AS sub2_id, base2.id AS base2_id, "
|
|
"base2.base1_id AS base2_base1_id, base2.data AS base2_data, "
|
|
"sub2.subdata AS sub2_subdata "
|
|
"FROM base2 JOIN sub2 ON base2.id = sub2.id "
|
|
"JOIN base1 ON base1.id = base2.base1_id "
|
|
"JOIN ep1 ON base2.id = ep1.base2_id "
|
|
"JOIN ep2 ON base2.id = ep2.base2_id"
|
|
)
|
|
|
|
def test_five(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Sub2).join(Sub1, Sub1.id == Sub2.base1_id).
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT sub2.id AS sub2_id, base2.id AS base2_id, "
|
|
"base2.base1_id AS base2_base1_id, base2.data AS base2_data, "
|
|
"sub2.subdata AS sub2_subdata "
|
|
"FROM base2 JOIN sub2 ON base2.id = sub2.id "
|
|
"JOIN "
|
|
"(base1 JOIN sub1 ON base1.id = sub1.id) "
|
|
"ON sub1.id = base2.base1_id "
|
|
"JOIN ep1 ON base2.id = ep1.base2_id "
|
|
"JOIN ep2 ON base2.id = ep2.base2_id"
|
|
)
|
|
|
|
def test_six(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
s.query(Sub2).from_self().
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT anon_1.sub2_id AS anon_1_sub2_id, "
|
|
"anon_1.base2_id AS anon_1_base2_id, "
|
|
"anon_1.base2_base1_id AS anon_1_base2_base1_id, "
|
|
"anon_1.base2_data AS anon_1_base2_data, "
|
|
"anon_1.sub2_subdata AS anon_1_sub2_subdata "
|
|
"FROM (SELECT sub2.id AS sub2_id, base2.id AS base2_id, "
|
|
"base2.base1_id AS base2_base1_id, base2.data AS base2_data, "
|
|
"sub2.subdata AS sub2_subdata "
|
|
"FROM base2 JOIN sub2 ON base2.id = sub2.id) AS anon_1 "
|
|
"JOIN ep1 ON anon_1.base2_id = ep1.base2_id "
|
|
"JOIN ep2 ON anon_1.base2_id = ep2.base2_id"
|
|
)
|
|
|
|
def test_seven(self):
|
|
Parent, Base1, Base2, Sub1, Sub2, EP1, EP2 = self._classes()
|
|
|
|
s = Session()
|
|
self.assert_compile(
|
|
# adding Sub2 to the entities list helps it,
|
|
# otherwise the joins for Sub2.ep1/ep2 don't have columns
|
|
# to latch onto. Can't really make it better than this
|
|
s.query(Parent, Sub2).join(Parent.sub1).\
|
|
join(Sub1.sub2).from_self().\
|
|
join(Sub2.ep1).
|
|
join(Sub2.ep2),
|
|
"SELECT anon_1.parent_id AS anon_1_parent_id, "
|
|
"anon_1.parent_data AS anon_1_parent_data, "
|
|
"anon_1.sub2_id AS anon_1_sub2_id, "
|
|
"anon_1.base2_id AS anon_1_base2_id, "
|
|
"anon_1.base2_base1_id AS anon_1_base2_base1_id, "
|
|
"anon_1.base2_data AS anon_1_base2_data, "
|
|
"anon_1.sub2_subdata AS anon_1_sub2_subdata "
|
|
"FROM (SELECT parent.id AS parent_id, parent.data AS parent_data, "
|
|
"sub2.id AS sub2_id, "
|
|
"base2.id AS base2_id, "
|
|
"base2.base1_id AS base2_base1_id, "
|
|
"base2.data AS base2_data, "
|
|
"sub2.subdata AS sub2_subdata "
|
|
"FROM parent JOIN (base1 JOIN sub1 ON base1.id = sub1.id) "
|
|
"ON parent.id = sub1.parent_id JOIN "
|
|
"(base2 JOIN sub2 ON base2.id = sub2.id) "
|
|
"ON base1.id = base2.base1_id) AS anon_1 "
|
|
"JOIN ep1 ON anon_1.base2_id = ep1.base2_id "
|
|
"JOIN ep2 ON anon_1.base2_id = ep2.base2_id"
|
|
)
|
|
|
|
|
|
class JoinedloadSinglePolysubSingle(
|
|
fixtures.DeclarativeMappedTest,
|
|
testing.AssertsCompiledSQL):
|
|
"""exercise issue #3611, using the test from dupe issue 3614"""
|
|
|
|
run_define_tables = None
|
|
__dialect__ = 'default'
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
Base = cls.DeclarativeBasic
|
|
|
|
class User(Base):
|
|
__tablename__ = 'users'
|
|
id = Column(Integer, primary_key=True)
|
|
|
|
class UserRole(Base):
|
|
__tablename__ = 'user_roles'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
|
|
row_type = Column(String(50), nullable=False)
|
|
__mapper_args__ = {'polymorphic_on': row_type}
|
|
|
|
user_id = Column(Integer, ForeignKey('users.id'), nullable=False)
|
|
user = relationship('User', lazy=False)
|
|
|
|
class Admin(UserRole):
|
|
__tablename__ = 'admins'
|
|
__mapper_args__ = {'polymorphic_identity': 'admin'}
|
|
|
|
id = Column(Integer, ForeignKey('user_roles.id'), primary_key=True)
|
|
|
|
class Thing(Base):
|
|
__tablename__ = 'things'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
|
|
admin_id = Column(Integer, ForeignKey('admins.id'))
|
|
admin = relationship('Admin', lazy=False)
|
|
|
|
def test_query(self):
|
|
Thing = self.classes.Thing
|
|
sess = Session()
|
|
self.assert_compile(
|
|
sess.query(Thing),
|
|
"SELECT things.id AS things_id, "
|
|
"things.admin_id AS things_admin_id, "
|
|
"users_1.id AS users_1_id, admins_1.id AS admins_1_id, "
|
|
"user_roles_1.id AS user_roles_1_id, "
|
|
"user_roles_1.row_type AS user_roles_1_row_type, "
|
|
"user_roles_1.user_id AS user_roles_1_user_id FROM things "
|
|
"LEFT OUTER JOIN (user_roles AS user_roles_1 JOIN admins "
|
|
"AS admins_1 ON user_roles_1.id = admins_1.id) ON "
|
|
"admins_1.id = things.admin_id "
|
|
"LEFT OUTER JOIN users AS "
|
|
"users_1 ON users_1.id = user_roles_1.user_id"
|
|
)
|
|
|
|
|
|
class JoinedloadOverWPolyAliased(
|
|
fixtures.DeclarativeMappedTest,
|
|
testing.AssertsCompiledSQL):
|
|
"""exercise issues in #3593 and #3611"""
|
|
|
|
run_setup_mappers = 'each'
|
|
run_setup_classes = 'each'
|
|
run_define_tables = 'each'
|
|
__dialect__ = 'default'
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
Base = cls.DeclarativeBasic
|
|
|
|
class Owner(Base):
|
|
__tablename__ = 'owner'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
type = Column(String(20))
|
|
|
|
__mapper_args__ = {
|
|
'polymorphic_on': type,
|
|
'with_polymorphic': ('*', None),
|
|
}
|
|
|
|
class SubOwner(Owner):
|
|
__mapper_args__ = {'polymorphic_identity': 'so'}
|
|
|
|
class Parent(Base):
|
|
__tablename__ = 'parent'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
type = Column(String(20))
|
|
|
|
__mapper_args__ = {
|
|
'polymorphic_on': type,
|
|
'with_polymorphic': ('*', None),
|
|
}
|
|
|
|
class Sub1(Parent):
|
|
__mapper_args__ = {'polymorphic_identity': 's1'}
|
|
|
|
class Link(Base):
|
|
__tablename__ = 'link'
|
|
|
|
parent_id = Column(
|
|
Integer, ForeignKey('parent.id'), primary_key=True)
|
|
child_id = Column(
|
|
Integer, ForeignKey('parent.id'), primary_key=True)
|
|
|
|
def _fixture_from_base(self):
|
|
Parent = self.classes.Parent
|
|
Link = self.classes.Link
|
|
Link.child = relationship(
|
|
Parent, primaryjoin=Link.child_id == Parent.id)
|
|
|
|
Parent.links = relationship(
|
|
Link,
|
|
primaryjoin=Parent.id == Link.parent_id,
|
|
)
|
|
return Parent
|
|
|
|
def _fixture_from_subclass(self):
|
|
Sub1 = self.classes.Sub1
|
|
Link = self.classes.Link
|
|
Parent = self.classes.Parent
|
|
Link.child = relationship(
|
|
Parent, primaryjoin=Link.child_id == Parent.id)
|
|
|
|
Sub1.links = relationship(
|
|
Link,
|
|
primaryjoin=Sub1.id == Link.parent_id,
|
|
)
|
|
return Sub1
|
|
|
|
def _fixture_to_subclass_to_base(self):
|
|
Owner = self.classes.Owner
|
|
Parent = self.classes.Parent
|
|
Sub1 = self.classes.Sub1
|
|
Link = self.classes.Link
|
|
|
|
# Link -> Sub1 -> Owner
|
|
|
|
Link.child = relationship(
|
|
Sub1, primaryjoin=Link.child_id == Sub1.id)
|
|
|
|
Parent.owner_id = Column(ForeignKey('owner.id'))
|
|
|
|
Parent.owner = relationship(Owner)
|
|
return Parent
|
|
|
|
def _fixture_to_base_to_base(self):
|
|
Owner = self.classes.Owner
|
|
Parent = self.classes.Parent
|
|
Link = self.classes.Link
|
|
|
|
# Link -> Parent -> Owner
|
|
|
|
Link.child = relationship(
|
|
Parent, primaryjoin=Link.child_id == Parent.id)
|
|
|
|
Parent.owner_id = Column(ForeignKey('owner.id'))
|
|
|
|
Parent.owner = relationship(Owner)
|
|
return Parent
|
|
|
|
def test_from_base(self):
|
|
self._test_poly_single_poly(self._fixture_from_base)
|
|
|
|
def test_from_sub(self):
|
|
self._test_poly_single_poly(self._fixture_from_subclass)
|
|
|
|
def test_to_sub_to_base(self):
|
|
self._test_single_poly_poly(self._fixture_to_subclass_to_base)
|
|
|
|
def test_to_base_to_base(self):
|
|
self._test_single_poly_poly(self._fixture_to_base_to_base)
|
|
|
|
def _test_poly_single_poly(self, fn):
|
|
cls = fn()
|
|
Link = self.classes.Link
|
|
|
|
session = Session()
|
|
q = session.query(cls).options(
|
|
joinedload_all(
|
|
cls.links,
|
|
Link.child,
|
|
cls.links
|
|
)
|
|
)
|
|
if cls is self.classes.Sub1:
|
|
extra = " WHERE parent.type IN (:type_1)"
|
|
else:
|
|
extra = ""
|
|
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT parent.id AS parent_id, parent.type AS parent_type, "
|
|
"link_1.parent_id AS link_1_parent_id, "
|
|
"link_1.child_id AS link_1_child_id, "
|
|
"parent_1.id AS parent_1_id, parent_1.type AS parent_1_type, "
|
|
"link_2.parent_id AS link_2_parent_id, "
|
|
"link_2.child_id AS link_2_child_id "
|
|
"FROM parent "
|
|
"LEFT OUTER JOIN link AS link_1 ON parent.id = link_1.parent_id "
|
|
"LEFT OUTER JOIN parent "
|
|
"AS parent_1 ON link_1.child_id = parent_1.id "
|
|
"LEFT OUTER JOIN link AS link_2 "
|
|
"ON parent_1.id = link_2.parent_id" + extra
|
|
)
|
|
|
|
def _test_single_poly_poly(self, fn):
|
|
parent_cls = fn()
|
|
Link = self.classes.Link
|
|
|
|
session = Session()
|
|
q = session.query(Link).options(
|
|
joinedload_all(
|
|
Link.child,
|
|
parent_cls.owner
|
|
)
|
|
)
|
|
|
|
if Link.child.property.mapper.class_ is self.classes.Sub1:
|
|
extra = "AND parent_1.type IN (:type_1) "
|
|
else:
|
|
extra = ""
|
|
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT link.parent_id AS link_parent_id, "
|
|
"link.child_id AS link_child_id, parent_1.id AS parent_1_id, "
|
|
"parent_1.type AS parent_1_type, "
|
|
"parent_1.owner_id AS parent_1_owner_id, "
|
|
"owner_1.id AS owner_1_id, owner_1.type AS owner_1_type "
|
|
"FROM link LEFT OUTER JOIN parent AS parent_1 "
|
|
"ON link.child_id = parent_1.id " + extra +
|
|
"LEFT OUTER JOIN owner AS owner_1 "
|
|
"ON owner_1.id = parent_1.owner_id"
|
|
)
|
|
|
|
def test_local_wpoly(self):
|
|
Sub1 = self._fixture_from_subclass()
|
|
Parent = self.classes.Parent
|
|
Link = self.classes.Link
|
|
|
|
poly = with_polymorphic(Parent, [Sub1])
|
|
|
|
session = Session()
|
|
q = session.query(poly).options(
|
|
joinedload(poly.Sub1.links).
|
|
joinedload(Link.child.of_type(Sub1)).
|
|
joinedload(poly.Sub1.links)
|
|
)
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT parent.id AS parent_id, parent.type AS parent_type, "
|
|
"link_1.parent_id AS link_1_parent_id, "
|
|
"link_1.child_id AS link_1_child_id, "
|
|
"parent_1.id AS parent_1_id, parent_1.type AS parent_1_type, "
|
|
"link_2.parent_id AS link_2_parent_id, "
|
|
"link_2.child_id AS link_2_child_id FROM parent "
|
|
"LEFT OUTER JOIN link AS link_1 ON parent.id = link_1.parent_id "
|
|
"LEFT OUTER JOIN parent AS parent_1 "
|
|
"ON link_1.child_id = parent_1.id "
|
|
"LEFT OUTER JOIN link AS link_2 ON parent_1.id = link_2.parent_id"
|
|
)
|
|
|
|
def test_local_wpoly_innerjoins(self):
|
|
# test for issue #3988
|
|
Sub1 = self._fixture_from_subclass()
|
|
Parent = self.classes.Parent
|
|
Link = self.classes.Link
|
|
|
|
poly = with_polymorphic(Parent, [Sub1])
|
|
|
|
session = Session()
|
|
q = session.query(poly).options(
|
|
joinedload(poly.Sub1.links, innerjoin=True).
|
|
joinedload(Link.child.of_type(Sub1), innerjoin=True).
|
|
joinedload(poly.Sub1.links, innerjoin=True)
|
|
)
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT parent.id AS parent_id, parent.type AS parent_type, "
|
|
"link_1.parent_id AS link_1_parent_id, "
|
|
"link_1.child_id AS link_1_child_id, "
|
|
"parent_1.id AS parent_1_id, parent_1.type AS parent_1_type, "
|
|
"link_2.parent_id AS link_2_parent_id, "
|
|
"link_2.child_id AS link_2_child_id FROM parent "
|
|
"LEFT OUTER JOIN link AS link_1 ON parent.id = link_1.parent_id "
|
|
"LEFT OUTER JOIN parent AS parent_1 "
|
|
"ON link_1.child_id = parent_1.id "
|
|
"LEFT OUTER JOIN link AS link_2 ON parent_1.id = link_2.parent_id"
|
|
)
|
|
|
|
def test_local_wpoly_innerjoins_roundtrip(self):
|
|
# test for issue #3988
|
|
Sub1 = self._fixture_from_subclass()
|
|
Parent = self.classes.Parent
|
|
Link = self.classes.Link
|
|
|
|
session = Session()
|
|
session.add_all([
|
|
Parent(),
|
|
Parent()
|
|
])
|
|
|
|
# represents "Parent" and "Sub1" rows
|
|
poly = with_polymorphic(Parent, [Sub1])
|
|
|
|
# innerjoin for Sub1 only, but this needs
|
|
# to be cancelled because the Parent rows
|
|
# would be omitted
|
|
q = session.query(poly).options(
|
|
joinedload(poly.Sub1.links, innerjoin=True).
|
|
joinedload(Link.child.of_type(Sub1), innerjoin=True)
|
|
)
|
|
eq_(len(q.all()), 2)
|
|
|
|
|
|
class JoinAcrossJoinedInhMultiPath(fixtures.DeclarativeMappedTest,
|
|
testing.AssertsCompiledSQL):
|
|
"""test long join paths with a joined-inh in the middle, where we go multiple
|
|
times across the same joined-inh to the same target but with other classes
|
|
in the middle. E.g. test [ticket:2908]
|
|
"""
|
|
|
|
run_setup_mappers = 'once'
|
|
__dialect__ = 'default'
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
Base = cls.DeclarativeBasic
|
|
|
|
class Root(Base):
|
|
__tablename__ = 'root'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
sub1_id = Column(Integer, ForeignKey('sub1.id'))
|
|
|
|
intermediate = relationship("Intermediate")
|
|
sub1 = relationship("Sub1")
|
|
|
|
class Intermediate(Base):
|
|
__tablename__ = 'intermediate'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
sub1_id = Column(Integer, ForeignKey('sub1.id'))
|
|
root_id = Column(Integer, ForeignKey('root.id'))
|
|
sub1 = relationship("Sub1")
|
|
|
|
class Parent(Base):
|
|
__tablename__ = 'parent'
|
|
|
|
id = Column(Integer, primary_key=True)
|
|
|
|
class Sub1(Parent):
|
|
__tablename__ = 'sub1'
|
|
id = Column(Integer, ForeignKey('parent.id'),
|
|
primary_key=True)
|
|
|
|
target = relationship("Target")
|
|
|
|
class Target(Base):
|
|
__tablename__ = 'target'
|
|
id = Column(Integer, primary_key=True)
|
|
sub1_id = Column(Integer, ForeignKey('sub1.id'))
|
|
|
|
def test_join(self):
|
|
Root, Intermediate, Sub1, Target = \
|
|
self.classes.Root, self.classes.Intermediate, \
|
|
self.classes.Sub1, self.classes.Target
|
|
s1_alias = aliased(Sub1)
|
|
s2_alias = aliased(Sub1)
|
|
t1_alias = aliased(Target)
|
|
t2_alias = aliased(Target)
|
|
|
|
sess = Session()
|
|
q = sess.query(Root).\
|
|
join(s1_alias, Root.sub1).join(t1_alias, s1_alias.target).\
|
|
join(Root.intermediate).join(s2_alias, Intermediate.sub1).\
|
|
join(t2_alias, s2_alias.target)
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT root.id AS root_id, root.sub1_id AS root_sub1_id "
|
|
"FROM root "
|
|
"JOIN (SELECT parent.id AS parent_id, sub1.id AS sub1_id "
|
|
"FROM parent JOIN sub1 ON parent.id = sub1.id) AS anon_1 "
|
|
"ON anon_1.sub1_id = root.sub1_id "
|
|
"JOIN target AS target_1 ON anon_1.sub1_id = target_1.sub1_id "
|
|
"JOIN intermediate ON root.id = intermediate.root_id "
|
|
"JOIN (SELECT parent.id AS parent_id, sub1.id AS sub1_id "
|
|
"FROM parent JOIN sub1 ON parent.id = sub1.id) AS anon_2 "
|
|
"ON anon_2.sub1_id = intermediate.sub1_id "
|
|
"JOIN target AS target_2 ON anon_2.sub1_id = target_2.sub1_id")
|
|
|
|
def test_join_flat(self):
|
|
Root, Intermediate, Sub1, Target = \
|
|
self.classes.Root, self.classes.Intermediate, \
|
|
self.classes.Sub1, self.classes.Target
|
|
s1_alias = aliased(Sub1, flat=True)
|
|
s2_alias = aliased(Sub1, flat=True)
|
|
t1_alias = aliased(Target)
|
|
t2_alias = aliased(Target)
|
|
|
|
sess = Session()
|
|
q = sess.query(Root).\
|
|
join(s1_alias, Root.sub1).join(t1_alias, s1_alias.target).\
|
|
join(Root.intermediate).join(s2_alias, Intermediate.sub1).\
|
|
join(t2_alias, s2_alias.target)
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT root.id AS root_id, root.sub1_id AS root_sub1_id "
|
|
"FROM root "
|
|
"JOIN (parent AS parent_1 JOIN sub1 AS sub1_1 "
|
|
"ON parent_1.id = sub1_1.id) "
|
|
"ON sub1_1.id = root.sub1_id "
|
|
"JOIN target AS target_1 ON sub1_1.id = target_1.sub1_id "
|
|
"JOIN intermediate ON root.id = intermediate.root_id "
|
|
"JOIN (parent AS parent_2 JOIN sub1 AS sub1_2 "
|
|
"ON parent_2.id = sub1_2.id) "
|
|
"ON sub1_2.id = intermediate.sub1_id "
|
|
"JOIN target AS target_2 ON sub1_2.id = target_2.sub1_id")
|
|
|
|
def test_joinedload(self):
|
|
Root, Intermediate, Sub1, Target = \
|
|
self.classes.Root, self.classes.Intermediate, \
|
|
self.classes.Sub1, self.classes.Target
|
|
|
|
sess = Session()
|
|
q = sess.query(Root).\
|
|
options(
|
|
joinedload(Root.sub1).joinedload(Sub1.target),
|
|
joinedload(Root.intermediate).joinedload(Intermediate.sub1).
|
|
joinedload(Sub1.target))
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT root.id AS root_id, root.sub1_id AS root_sub1_id, "
|
|
"target_1.id AS target_1_id, "
|
|
"target_1.sub1_id AS target_1_sub1_id, "
|
|
"sub1_1.id AS sub1_1_id, parent_1.id AS parent_1_id, "
|
|
"intermediate_1.id AS intermediate_1_id, "
|
|
"intermediate_1.sub1_id AS intermediate_1_sub1_id, "
|
|
"intermediate_1.root_id AS intermediate_1_root_id, "
|
|
"target_2.id AS target_2_id, "
|
|
"target_2.sub1_id AS target_2_sub1_id, "
|
|
"sub1_2.id AS sub1_2_id, parent_2.id AS parent_2_id "
|
|
"FROM root "
|
|
"LEFT OUTER JOIN intermediate AS intermediate_1 "
|
|
"ON root.id = intermediate_1.root_id "
|
|
"LEFT OUTER JOIN (parent AS parent_1 JOIN sub1 AS sub1_1 "
|
|
"ON parent_1.id = sub1_1.id) "
|
|
"ON sub1_1.id = intermediate_1.sub1_id "
|
|
"LEFT OUTER JOIN target AS target_1 "
|
|
"ON sub1_1.id = target_1.sub1_id "
|
|
"LEFT OUTER JOIN (parent AS parent_2 JOIN sub1 AS sub1_2 "
|
|
"ON parent_2.id = sub1_2.id) ON sub1_2.id = root.sub1_id "
|
|
"LEFT OUTER JOIN target AS target_2 "
|
|
"ON sub1_2.id = target_2.sub1_id")
|
|
|
|
|
|
class MultipleAdaptUsesEntityOverTableTest(
|
|
AssertsCompiledSQL, fixtures.MappedTest):
|
|
__dialect__ = 'default'
|
|
run_create_tables = None
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('a', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('name', String))
|
|
Table('b', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True))
|
|
Table('c', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True),
|
|
Column('bid', Integer, ForeignKey('b.id')))
|
|
Table('d', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True),
|
|
Column('cid', Integer, ForeignKey('c.id')))
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
class A(cls.Comparable):
|
|
pass
|
|
|
|
class B(A):
|
|
pass
|
|
|
|
class C(A):
|
|
pass
|
|
|
|
class D(A):
|
|
pass
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
A, B, C, D = cls.classes.A, cls.classes.B, cls.classes.C, cls.classes.D
|
|
a, b, c, d = cls.tables.a, cls.tables.b, cls.tables.c, cls.tables.d
|
|
mapper(A, a)
|
|
mapper(B, b, inherits=A)
|
|
mapper(C, c, inherits=A)
|
|
mapper(D, d, inherits=A)
|
|
|
|
def _two_join_fixture(self):
|
|
A, B, C, D = (self.classes.A, self.classes.B, self.classes.C,
|
|
self.classes.D)
|
|
s = Session()
|
|
return s.query(B.name, C.name, D.name).select_from(B).\
|
|
join(C, C.bid == B.id).\
|
|
join(D, D.cid == C.id)
|
|
|
|
def test_two_joins_adaption(self):
|
|
a, b, c, d = self.tables.a, self.tables.b, self.tables.c, self.tables.d
|
|
q = self._two_join_fixture()
|
|
|
|
btoc = q._from_obj[0].left
|
|
|
|
ac_adapted = btoc.right.element.left
|
|
c_adapted = btoc.right.element.right
|
|
|
|
is_(ac_adapted.element, a)
|
|
is_(c_adapted.element, c)
|
|
|
|
ctod = q._from_obj[0].right
|
|
ad_adapted = ctod.left
|
|
d_adapted = ctod.right
|
|
is_(ad_adapted.element, a)
|
|
is_(d_adapted.element, d)
|
|
|
|
bname, cname, dname = q._entities
|
|
|
|
b_name_adapted = q._adapt_clause(bname.column, False, True)
|
|
c_name_adapted = q._adapt_clause(cname.column, False, True)
|
|
d_name_adapted = q._adapt_clause(dname.column, False, True)
|
|
|
|
assert bool(b_name_adapted == a.c.name)
|
|
assert bool(c_name_adapted == ac_adapted.c.name)
|
|
assert bool(d_name_adapted == ad_adapted.c.name)
|
|
|
|
def test_two_joins_sql(self):
|
|
q = self._two_join_fixture()
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT a.name AS a_name, a_1.name AS a_1_name, "
|
|
"a_2.name AS a_2_name "
|
|
"FROM a JOIN b ON a.id = b.id JOIN "
|
|
"(a AS a_1 JOIN c AS c_1 ON a_1.id = c_1.id) ON c_1.bid = b.id "
|
|
"JOIN (a AS a_2 JOIN d AS d_1 ON a_2.id = d_1.id) "
|
|
"ON d_1.cid = c_1.id")
|
|
|
|
|
|
class SameNameOnJoined(fixtures.MappedTest):
|
|
|
|
run_setup_mappers = 'once'
|
|
run_inserts = None
|
|
run_deletes = None
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table(
|
|
'a', metadata,
|
|
Column(
|
|
'id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('t', String(5))
|
|
)
|
|
Table(
|
|
'a_sub', metadata,
|
|
Column('id', Integer, ForeignKey('a.id'), primary_key=True)
|
|
)
|
|
Table(
|
|
'b', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('a_id', Integer, ForeignKey('a.id'))
|
|
|
|
)
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
class A(cls.Comparable):
|
|
pass
|
|
|
|
class ASub(A):
|
|
pass
|
|
|
|
class B(cls.Comparable):
|
|
pass
|
|
|
|
mapper(
|
|
A, cls.tables.a, polymorphic_on=cls.tables.a.c.t,
|
|
polymorphic_identity='a',
|
|
properties={
|
|
'bs': relationship(B, cascade="all, delete-orphan")
|
|
}
|
|
)
|
|
|
|
mapper(
|
|
ASub, cls.tables.a_sub, inherits=A,
|
|
polymorphic_identity='asub', properties={
|
|
'bs': relationship(B, cascade="all, delete-orphan")
|
|
}
|
|
)
|
|
|
|
mapper(B, cls.tables.b)
|
|
|
|
def test_persist(self):
|
|
A, ASub, B = self.classes('A', 'ASub', 'B')
|
|
|
|
s = Session(testing.db)
|
|
|
|
s.add_all([
|
|
A(bs=[B(), B(), B()]),
|
|
ASub(bs=[B(), B(), B()])
|
|
])
|
|
s.commit()
|
|
|
|
eq_(s.query(B).count(), 6)
|
|
|
|
for a in s.query(A):
|
|
eq_(len(a.bs), 3)
|
|
s.delete(a)
|
|
|
|
s.commit()
|
|
|
|
eq_(s.query(B).count(), 0)
|
|
|
|
|
|
class BetweenSubclassJoinWExtraJoinedLoad(
|
|
fixtures.DeclarativeMappedTest,
|
|
testing.AssertsCompiledSQL):
|
|
"""test for [ticket:3884]"""
|
|
|
|
run_define_tables = None
|
|
__dialect__ = 'default'
|
|
|
|
@classmethod
|
|
def setup_classes(cls):
|
|
Base = cls.DeclarativeBasic
|
|
|
|
class Person(Base):
|
|
__tablename__ = 'people'
|
|
id = Column(Integer, primary_key=True)
|
|
discriminator = Column('type', String(50))
|
|
__mapper_args__ = {'polymorphic_on': discriminator}
|
|
|
|
class Manager(Person):
|
|
__tablename__ = 'managers'
|
|
__mapper_args__ = {'polymorphic_identity': 'manager'}
|
|
id = Column(Integer, ForeignKey('people.id'), primary_key=True)
|
|
|
|
class Engineer(Person):
|
|
__tablename__ = 'engineers'
|
|
__mapper_args__ = {'polymorphic_identity': 'engineer'}
|
|
id = Column(Integer, ForeignKey('people.id'), primary_key=True)
|
|
primary_language = Column(String(50))
|
|
manager_id = Column(Integer, ForeignKey('managers.id'))
|
|
manager = relationship(
|
|
Manager, primaryjoin=(Manager.id == manager_id))
|
|
|
|
class LastSeen(Base):
|
|
__tablename__ = 'seen'
|
|
id = Column(Integer, ForeignKey('people.id'), primary_key=True)
|
|
timestamp = Column(Integer)
|
|
taggable = relationship(
|
|
Person, primaryjoin=(Person.id == id),
|
|
backref=backref("last_seen", lazy=False))
|
|
|
|
def test_query(self):
|
|
Engineer, Manager = self.classes("Engineer", "Manager")
|
|
|
|
sess = Session()
|
|
|
|
# eager join is both from Enginer->LastSeen as well as
|
|
# Manager->LastSeen. In the case of Manager->LastSeen,
|
|
# Manager is internally aliased, and comes to JoinedEagerLoader
|
|
# with no "parent" entity but an adapter.
|
|
q = sess.query(Engineer, Manager).join(Engineer.manager)
|
|
self.assert_compile(
|
|
q,
|
|
"SELECT people.type AS people_type, engineers.id AS engineers_id, "
|
|
"people.id AS people_id, "
|
|
"engineers.primary_language AS engineers_primary_language, "
|
|
"engineers.manager_id AS engineers_manager_id, "
|
|
"people_1.type AS people_1_type, managers_1.id AS managers_1_id, "
|
|
"people_1.id AS people_1_id, seen_1.id AS seen_1_id, "
|
|
"seen_1.timestamp AS seen_1_timestamp, seen_2.id AS seen_2_id, "
|
|
"seen_2.timestamp AS seen_2_timestamp "
|
|
"FROM people JOIN engineers ON people.id = engineers.id "
|
|
"JOIN (people AS people_1 JOIN managers AS managers_1 "
|
|
"ON people_1.id = managers_1.id) "
|
|
"ON managers_1.id = engineers.manager_id LEFT OUTER JOIN "
|
|
"seen AS seen_1 ON people.id = seen_1.id LEFT OUTER JOIN "
|
|
"seen AS seen_2 ON people_1.id = seen_2.id"
|
|
)
|