mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-01 21:38:55 -04:00
Mike Bayer
c6bceb7775
- converted all eager to joined in examples - fixed beaker/advanced.py to reference RelationshipCache
1124 lines
45 KiB
Python
1124 lines
45 KiB
Python
"""this is a test suite consisting mainly of end-user test cases, testing all kinds of painful
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inheritance setups for which we maintain compatibility.
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"""
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from sqlalchemy.test.testing import eq_
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from sqlalchemy import *
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from sqlalchemy import util
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from sqlalchemy.orm import *
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from sqlalchemy.test import TestBase, AssertsExecutionResults, testing
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from sqlalchemy.util import function_named
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from test.orm import _base, _fixtures
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from sqlalchemy.test.testing import eq_
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from sqlalchemy.test.schema import Table, Column
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class AttrSettable(object):
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def __init__(self, **kwargs):
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[setattr(self, k, v) for k, v in kwargs.iteritems()]
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def __repr__(self):
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return self.__class__.__name__ + "(%s)" % (hex(id(self)))
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class RelationshipTest1(_base.MappedTest):
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"""test self-referential relationships on polymorphic mappers"""
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@classmethod
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def define_tables(cls, metadata):
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global people, managers
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people = Table('people', metadata,
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Column('person_id', Integer, Sequence('person_id_seq', optional=True), primary_key=True),
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Column('manager_id', Integer, ForeignKey('managers.person_id', use_alter=True, name="mpid_fq")),
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Column('name', String(50)),
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Column('type', String(30)))
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managers = Table('managers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('status', String(30)),
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Column('manager_name', String(50))
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)
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def teardown(self):
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people.update(values={people.c.manager_id:None}).execute()
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super(RelationshipTest1, self).teardown()
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def test_parent_refs_descendant(self):
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class Person(AttrSettable):
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pass
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class Manager(Person):
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pass
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# note that up until recently (0.4.4), we had to specify "foreign_keys" here
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# for this primary join.
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mapper(Person, people, properties={
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'manager':relationship(Manager, primaryjoin=(people.c.manager_id ==
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managers.c.person_id),
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uselist=False, post_update=True)
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})
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mapper(Manager, managers, inherits=Person,
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inherit_condition=people.c.person_id==managers.c.person_id)
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eq_(class_mapper(Person).get_property('manager').synchronize_pairs, [(managers.c.person_id,people.c.manager_id)])
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session = create_session()
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p = Person(name='some person')
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m = Manager(name='some manager')
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p.manager = m
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session.add(p)
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session.flush()
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session.expunge_all()
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p = session.query(Person).get(p.person_id)
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m = session.query(Manager).get(m.person_id)
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print p, m, p.manager
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assert p.manager is m
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def test_descendant_refs_parent(self):
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class Person(AttrSettable):
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pass
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class Manager(Person):
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pass
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mapper(Person, people)
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mapper(Manager, managers, inherits=Person, inherit_condition=people.c.person_id==managers.c.person_id, properties={
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'employee':relationship(Person, primaryjoin=(people.c.manager_id ==
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managers.c.person_id),
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foreign_keys=[people.c.manager_id],
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uselist=False, post_update=True)
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})
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session = create_session()
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p = Person(name='some person')
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m = Manager(name='some manager')
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m.employee = p
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session.add(m)
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session.flush()
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session.expunge_all()
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p = session.query(Person).get(p.person_id)
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m = session.query(Manager).get(m.person_id)
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print p, m, m.employee
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assert m.employee is p
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class RelationshipTest2(_base.MappedTest):
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"""test self-referential relationships on polymorphic mappers"""
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@classmethod
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def define_tables(cls, metadata):
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global people, managers, data
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people = Table('people', metadata,
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Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(30)))
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managers = Table('managers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('manager_id', Integer, ForeignKey('people.person_id')),
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Column('status', String(30)),
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)
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data = Table('data', metadata,
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Column('person_id', Integer, ForeignKey('managers.person_id'), primary_key=True),
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Column('data', String(30))
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)
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def testrelationshiponsubclass_j1_nodata(self):
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self.do_test("join1", False)
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def testrelationshiponsubclass_j2_nodata(self):
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self.do_test("join2", False)
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def testrelationshiponsubclass_j1_data(self):
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self.do_test("join1", True)
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def testrelationshiponsubclass_j2_data(self):
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self.do_test("join2", True)
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def testrelationshiponsubclass_j3_nodata(self):
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self.do_test("join3", False)
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def testrelationshiponsubclass_j3_data(self):
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self.do_test("join3", True)
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def do_test(self, jointype="join1", usedata=False):
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class Person(AttrSettable):
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pass
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class Manager(Person):
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pass
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if jointype == "join1":
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poly_union = polymorphic_union({
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'person':people.select(people.c.type=='person'),
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'manager':join(people, managers, people.c.person_id==managers.c.person_id)
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}, None)
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polymorphic_on=poly_union.c.type
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elif jointype == "join2":
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poly_union = polymorphic_union({
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'person':people.select(people.c.type=='person'),
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'manager':managers.join(people, people.c.person_id==managers.c.person_id)
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}, None)
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polymorphic_on=poly_union.c.type
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elif jointype == "join3":
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poly_union = None
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polymorphic_on = people.c.type
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if usedata:
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class Data(object):
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def __init__(self, data):
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self.data = data
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mapper(Data, data)
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mapper(Person, people, with_polymorphic=('*', poly_union), polymorphic_identity='person', polymorphic_on=polymorphic_on)
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if usedata:
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mapper(Manager, managers, inherits=Person, inherit_condition=people.c.person_id==managers.c.person_id, polymorphic_identity='manager',
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properties={
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'colleague':relationship(Person, primaryjoin=managers.c.manager_id==people.c.person_id, lazy='select', uselist=False),
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'data':relationship(Data, uselist=False)
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}
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)
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else:
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mapper(Manager, managers, inherits=Person, inherit_condition=people.c.person_id==managers.c.person_id, polymorphic_identity='manager',
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properties={
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'colleague':relationship(Person, primaryjoin=managers.c.manager_id==people.c.person_id, lazy='select', uselist=False)
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}
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)
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sess = create_session()
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p = Person(name='person1')
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m = Manager(name='manager1')
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m.colleague = p
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if usedata:
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m.data = Data('ms data')
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sess.add(m)
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sess.flush()
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sess.expunge_all()
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p = sess.query(Person).get(p.person_id)
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m = sess.query(Manager).get(m.person_id)
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print p
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print m
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assert m.colleague is p
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if usedata:
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assert m.data.data == 'ms data'
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class RelationshipTest3(_base.MappedTest):
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"""test self-referential relationships on polymorphic mappers"""
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@classmethod
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def define_tables(cls, metadata):
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global people, managers, data
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people = Table('people', metadata,
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Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('colleague_id', Integer, ForeignKey('people.person_id')),
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Column('name', String(50)),
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Column('type', String(30)))
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managers = Table('managers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('status', String(30)),
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)
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data = Table('data', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('data', String(30))
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)
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def _generate_test(jointype="join1", usedata=False):
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def do_test(self):
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class Person(AttrSettable):
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pass
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class Manager(Person):
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pass
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if usedata:
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class Data(object):
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def __init__(self, data):
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self.data = data
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if jointype == "join1":
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poly_union = polymorphic_union({
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'manager':managers.join(people, people.c.person_id==managers.c.person_id),
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'person':people.select(people.c.type=='person')
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}, None)
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elif jointype =="join2":
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poly_union = polymorphic_union({
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'manager':join(people, managers, people.c.person_id==managers.c.person_id),
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'person':people.select(people.c.type=='person')
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}, None)
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elif jointype == 'join3':
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poly_union = people.outerjoin(managers)
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elif jointype == "join4":
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poly_union=None
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if usedata:
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mapper(Data, data)
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if usedata:
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mapper(Person, people, with_polymorphic=('*', poly_union), polymorphic_identity='person', polymorphic_on=people.c.type,
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properties={
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'colleagues':relationship(Person, primaryjoin=people.c.colleague_id==people.c.person_id, remote_side=people.c.colleague_id, uselist=True),
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'data':relationship(Data, uselist=False)
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}
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)
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else:
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mapper(Person, people, with_polymorphic=('*', poly_union), polymorphic_identity='person', polymorphic_on=people.c.type,
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properties={
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'colleagues':relationship(Person, primaryjoin=people.c.colleague_id==people.c.person_id,
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remote_side=people.c.colleague_id, uselist=True)
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}
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)
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mapper(Manager, managers, inherits=Person, inherit_condition=people.c.person_id==managers.c.person_id, polymorphic_identity='manager')
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sess = create_session()
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p = Person(name='person1')
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p2 = Person(name='person2')
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p3 = Person(name='person3')
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m = Manager(name='manager1')
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p.colleagues.append(p2)
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m.colleagues.append(p3)
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if usedata:
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p.data = Data('ps data')
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m.data = Data('ms data')
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sess.add(m)
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sess.add(p)
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sess.flush()
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sess.expunge_all()
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p = sess.query(Person).get(p.person_id)
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p2 = sess.query(Person).get(p2.person_id)
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p3 = sess.query(Person).get(p3.person_id)
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m = sess.query(Person).get(m.person_id)
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print p, p2, p.colleagues, m.colleagues
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assert len(p.colleagues) == 1
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assert p.colleagues == [p2]
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assert m.colleagues == [p3]
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if usedata:
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assert p.data.data == 'ps data'
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assert m.data.data == 'ms data'
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do_test = function_named(
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do_test, 'test_relationship_on_base_class_%s_%s' % (
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jointype, data and "nodata" or "data"))
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return do_test
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for jointype in ["join1", "join2", "join3", "join4"]:
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for data in (True, False):
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func = _generate_test(jointype, data)
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setattr(RelationshipTest3, func.__name__, func)
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del func
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class RelationshipTest4(_base.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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global people, engineers, managers, cars
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people = Table('people', metadata,
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Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('name', String(50)))
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engineers = Table('engineers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('status', String(30)))
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managers = Table('managers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('longer_status', String(70)))
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cars = Table('cars', metadata,
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Column('car_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('owner', Integer, ForeignKey('people.person_id')))
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def testmanytoonepolymorphic(self):
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"""in this test, the polymorphic union is between two subclasses, but does not include the base table by itself
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in the union. however, the primaryjoin condition is going to be against the base table, and its a many-to-one
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relationship (unlike the test in polymorph.py) so the column in the base table is explicit. Can the ClauseAdapter
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figure out how to alias the primaryjoin to the polymorphic union ?"""
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# class definitions
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class Person(object):
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def __init__(self, **kwargs):
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for key, value in kwargs.iteritems():
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setattr(self, key, value)
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def __repr__(self):
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return "Ordinary person %s" % self.name
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class Engineer(Person):
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def __repr__(self):
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return "Engineer %s, status %s" % (self.name, self.status)
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class Manager(Person):
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def __repr__(self):
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return "Manager %s, status %s" % (self.name, self.longer_status)
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class Car(object):
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def __init__(self, **kwargs):
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for key, value in kwargs.iteritems():
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setattr(self, key, value)
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def __repr__(self):
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return "Car number %d" % self.car_id
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# create a union that represents both types of joins.
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employee_join = polymorphic_union(
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{
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'engineer':people.join(engineers),
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'manager':people.join(managers),
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}, "type", 'employee_join')
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person_mapper = mapper(Person, people, with_polymorphic=('*', employee_join), polymorphic_on=employee_join.c.type, polymorphic_identity='person')
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engineer_mapper = mapper(Engineer, engineers, inherits=person_mapper, polymorphic_identity='engineer')
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manager_mapper = mapper(Manager, managers, inherits=person_mapper, polymorphic_identity='manager')
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car_mapper = mapper(Car, cars, properties= {'employee':relationship(person_mapper)})
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session = create_session()
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# creating 5 managers named from M1 to E5
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for i in range(1,5):
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session.add(Manager(name="M%d" % i,longer_status="YYYYYYYYY"))
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# creating 5 engineers named from E1 to E5
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for i in range(1,5):
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session.add(Engineer(name="E%d" % i,status="X"))
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session.flush()
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engineer4 = session.query(Engineer).filter(Engineer.name=="E4").first()
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manager3 = session.query(Manager).filter(Manager.name=="M3").first()
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car1 = Car(employee=engineer4)
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session.add(car1)
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car2 = Car(employee=manager3)
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session.add(car2)
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session.flush()
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session.expunge_all()
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def go():
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testcar = session.query(Car).options(joinedload('employee')).get(car1.car_id)
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assert str(testcar.employee) == "Engineer E4, status X"
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self.assert_sql_count(testing.db, go, 1)
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print "----------------------------"
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car1 = session.query(Car).get(car1.car_id)
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print "----------------------------"
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usingGet = session.query(person_mapper).get(car1.owner)
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print "----------------------------"
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usingProperty = car1.employee
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print "----------------------------"
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# All print should output the same person (engineer E4)
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assert str(engineer4) == "Engineer E4, status X"
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print str(usingGet)
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assert str(usingGet) == "Engineer E4, status X"
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assert str(usingProperty) == "Engineer E4, status X"
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session.expunge_all()
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print "-----------------------------------------------------------------"
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# and now for the lightning round, eager !
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def go():
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testcar = session.query(Car).options(joinedload('employee')).get(car1.car_id)
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assert str(testcar.employee) == "Engineer E4, status X"
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self.assert_sql_count(testing.db, go, 1)
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session.expunge_all()
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s = session.query(Car)
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c = s.join("employee").filter(Person.name=="E4")[0]
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assert c.car_id==car1.car_id
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class RelationshipTest5(_base.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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global people, engineers, managers, cars
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people = Table('people', metadata,
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Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('name', String(50)),
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Column('type', String(50)))
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engineers = Table('engineers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('status', String(30)))
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managers = Table('managers', metadata,
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Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
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Column('longer_status', String(70)))
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cars = Table('cars', metadata,
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Column('car_id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('owner', Integer, ForeignKey('people.person_id')))
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def test_eager_empty(self):
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"""test parent object with child relationship to an inheriting mapper, using eager loads,
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works when there are no child objects present"""
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class Person(object):
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def __init__(self, **kwargs):
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for key, value in kwargs.iteritems():
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setattr(self, key, value)
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def __repr__(self):
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return "Ordinary person %s" % self.name
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class Engineer(Person):
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def __repr__(self):
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return "Engineer %s, status %s" % (self.name, self.status)
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class Manager(Person):
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def __repr__(self):
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return "Manager %s, status %s" % (self.name, self.longer_status)
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class Car(object):
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def __init__(self, **kwargs):
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for key, value in kwargs.iteritems():
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setattr(self, key, value)
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def __repr__(self):
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return "Car number %d" % self.car_id
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person_mapper = mapper(Person, people, polymorphic_on=people.c.type, polymorphic_identity='person')
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engineer_mapper = mapper(Engineer, engineers, inherits=person_mapper, polymorphic_identity='engineer')
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manager_mapper = mapper(Manager, managers, inherits=person_mapper, polymorphic_identity='manager')
|
|
car_mapper = mapper(Car, cars, properties= {'manager':relationship(manager_mapper, lazy='joined')})
|
|
|
|
sess = create_session()
|
|
car1 = Car()
|
|
car2 = Car()
|
|
car2.manager = Manager()
|
|
sess.add(car1)
|
|
sess.add(car2)
|
|
sess.flush()
|
|
sess.expunge_all()
|
|
|
|
carlist = sess.query(Car).all()
|
|
assert carlist[0].manager is None
|
|
assert carlist[1].manager.person_id == car2.manager.person_id
|
|
|
|
class RelationshipTest6(_base.MappedTest):
|
|
"""test self-referential relationships on a single joined-table inheritance mapper"""
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
global people, managers, data
|
|
people = Table('people', metadata,
|
|
Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('name', String(50)),
|
|
)
|
|
|
|
managers = Table('managers', metadata,
|
|
Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
|
|
Column('colleague_id', Integer, ForeignKey('managers.person_id')),
|
|
Column('status', String(30)),
|
|
)
|
|
|
|
def testbasic(self):
|
|
class Person(AttrSettable):
|
|
pass
|
|
class Manager(Person):
|
|
pass
|
|
|
|
mapper(Person, people)
|
|
# relationship is from people.join(managers) -> people.join(managers). self referential logic
|
|
# needs to be used to figure out the lazy clause, meaning create_lazy_clause must go from parent.mapped_table
|
|
# to parent.mapped_table
|
|
mapper(Manager, managers, inherits=Person, inherit_condition=people.c.person_id==managers.c.person_id,
|
|
properties={
|
|
'colleague':relationship(Manager, primaryjoin=managers.c.colleague_id==managers.c.person_id, lazy='select', uselist=False)
|
|
}
|
|
)
|
|
|
|
sess = create_session()
|
|
m = Manager(name='manager1')
|
|
m2 =Manager(name='manager2')
|
|
m.colleague = m2
|
|
sess.add(m)
|
|
sess.flush()
|
|
|
|
sess.expunge_all()
|
|
m = sess.query(Manager).get(m.person_id)
|
|
m2 = sess.query(Manager).get(m2.person_id)
|
|
assert m.colleague is m2
|
|
|
|
class RelationshipTest7(_base.MappedTest):
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
global people, engineers, managers, cars, offroad_cars
|
|
cars = Table('cars', metadata,
|
|
Column('car_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('name', String(30)))
|
|
|
|
offroad_cars = Table('offroad_cars', metadata,
|
|
Column('car_id',Integer, ForeignKey('cars.car_id'),nullable=False,primary_key=True))
|
|
|
|
people = Table('people', metadata,
|
|
Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('car_id', Integer, ForeignKey('cars.car_id'), nullable=False),
|
|
Column('name', String(50)))
|
|
|
|
engineers = Table('engineers', metadata,
|
|
Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
|
|
Column('field', String(30)))
|
|
|
|
|
|
managers = Table('managers', metadata,
|
|
Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
|
|
Column('category', String(70)))
|
|
|
|
@testing.uses_deprecated("fold_equivalents is deprecated.")
|
|
def test_manytoone_lazyload(self):
|
|
"""test that lazy load clause to a polymorphic child mapper generates correctly [ticket:493]"""
|
|
class PersistentObject(object):
|
|
def __init__(self, **kwargs):
|
|
for key, value in kwargs.iteritems():
|
|
setattr(self, key, value)
|
|
|
|
class Status(PersistentObject):
|
|
def __repr__(self):
|
|
return "Status %s" % self.name
|
|
|
|
class Person(PersistentObject):
|
|
def __repr__(self):
|
|
return "Ordinary person %s" % self.name
|
|
|
|
class Engineer(Person):
|
|
def __repr__(self):
|
|
return "Engineer %s, field %s" % (self.name, self.field)
|
|
|
|
class Manager(Person):
|
|
def __repr__(self):
|
|
return "Manager %s, category %s" % (self.name, self.category)
|
|
|
|
class Car(PersistentObject):
|
|
def __repr__(self):
|
|
return "Car number %d, name %s" % (self.car_id, self.name)
|
|
|
|
class Offraod_Car(Car):
|
|
def __repr__(self):
|
|
return "Offroad Car number %d, name %s" % (self.car_id,self.name)
|
|
|
|
employee_join = polymorphic_union(
|
|
{
|
|
'engineer':people.join(engineers),
|
|
'manager':people.join(managers),
|
|
}, "type", 'employee_join')
|
|
|
|
car_join = polymorphic_union(
|
|
{
|
|
'car' : cars.outerjoin(offroad_cars).select(offroad_cars.c.car_id == None, fold_equivalents=True),
|
|
'offroad' : cars.join(offroad_cars)
|
|
}, "type", 'car_join')
|
|
|
|
car_mapper = mapper(Car, cars,
|
|
with_polymorphic=('*', car_join) ,polymorphic_on=car_join.c.type,
|
|
polymorphic_identity='car',
|
|
)
|
|
offroad_car_mapper = mapper(Offraod_Car, offroad_cars, inherits=car_mapper, polymorphic_identity='offroad')
|
|
person_mapper = mapper(Person, people,
|
|
with_polymorphic=('*', employee_join), polymorphic_on=employee_join.c.type,
|
|
polymorphic_identity='person',
|
|
properties={
|
|
'car':relationship(car_mapper)
|
|
})
|
|
engineer_mapper = mapper(Engineer, engineers, inherits=person_mapper, polymorphic_identity='engineer')
|
|
manager_mapper = mapper(Manager, managers, inherits=person_mapper, polymorphic_identity='manager')
|
|
|
|
session = create_session()
|
|
basic_car=Car(name="basic")
|
|
offroad_car=Offraod_Car(name="offroad")
|
|
|
|
for i in range(1,4):
|
|
if i%2:
|
|
car=Car()
|
|
else:
|
|
car=Offraod_Car()
|
|
session.add(Manager(name="M%d" % i,category="YYYYYYYYY",car=car))
|
|
session.add(Engineer(name="E%d" % i,field="X",car=car))
|
|
session.flush()
|
|
session.expunge_all()
|
|
|
|
r = session.query(Person).all()
|
|
for p in r:
|
|
assert p.car_id == p.car.car_id
|
|
|
|
class RelationshipTest8(_base.MappedTest):
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
global taggable, users
|
|
taggable = Table('taggable', metadata,
|
|
Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('type', String(30)),
|
|
Column('owner_id', Integer, ForeignKey('taggable.id')),
|
|
)
|
|
users = Table ('users', metadata,
|
|
Column('id', Integer, ForeignKey('taggable.id'), primary_key=True),
|
|
Column('data', String(50)),
|
|
)
|
|
|
|
def test_selfref_onjoined(self):
|
|
class Taggable(_base.ComparableEntity):
|
|
pass
|
|
|
|
class User(Taggable):
|
|
pass
|
|
|
|
mapper( Taggable, taggable, polymorphic_on=taggable.c.type, polymorphic_identity='taggable', properties = {
|
|
'owner' : relationship (User,
|
|
primaryjoin=taggable.c.owner_id ==taggable.c.id,
|
|
remote_side=taggable.c.id
|
|
),
|
|
})
|
|
|
|
|
|
mapper(User, users, inherits=Taggable, polymorphic_identity='user',
|
|
inherit_condition=users.c.id == taggable.c.id,
|
|
)
|
|
|
|
|
|
u1 = User(data='u1')
|
|
t1 = Taggable(owner=u1)
|
|
sess = create_session()
|
|
sess.add(t1)
|
|
sess.flush()
|
|
|
|
sess.expunge_all()
|
|
eq_(
|
|
sess.query(Taggable).order_by(Taggable.id).all(),
|
|
[User(data='u1'), Taggable(owner=User(data='u1'))]
|
|
)
|
|
|
|
class GenerativeTest(TestBase, AssertsExecutionResults):
|
|
@classmethod
|
|
def setup_class(cls):
|
|
# cars---owned by--- people (abstract) --- has a --- status
|
|
# | ^ ^ |
|
|
# | | | |
|
|
# | engineers managers |
|
|
# | |
|
|
# +--------------------------------------- has a ------+
|
|
|
|
global metadata, status, people, engineers, managers, cars
|
|
metadata = MetaData(testing.db)
|
|
# table definitions
|
|
status = Table('status', metadata,
|
|
Column('status_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('name', String(20)))
|
|
|
|
people = Table('people', metadata,
|
|
Column('person_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('status_id', Integer, ForeignKey('status.status_id'), nullable=False),
|
|
Column('name', String(50)))
|
|
|
|
engineers = Table('engineers', metadata,
|
|
Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
|
|
Column('field', String(30)))
|
|
|
|
managers = Table('managers', metadata,
|
|
Column('person_id', Integer, ForeignKey('people.person_id'), primary_key=True),
|
|
Column('category', String(70)))
|
|
|
|
cars = Table('cars', metadata,
|
|
Column('car_id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('status_id', Integer, ForeignKey('status.status_id'), nullable=False),
|
|
Column('owner', Integer, ForeignKey('people.person_id'), nullable=False))
|
|
|
|
metadata.create_all()
|
|
|
|
@classmethod
|
|
def teardown_class(cls):
|
|
metadata.drop_all()
|
|
def teardown(self):
|
|
clear_mappers()
|
|
for t in reversed(metadata.sorted_tables):
|
|
t.delete().execute()
|
|
|
|
def testjointo(self):
|
|
# class definitions
|
|
class PersistentObject(object):
|
|
def __init__(self, **kwargs):
|
|
for key, value in kwargs.iteritems():
|
|
setattr(self, key, value)
|
|
class Status(PersistentObject):
|
|
def __repr__(self):
|
|
return "Status %s" % self.name
|
|
class Person(PersistentObject):
|
|
def __repr__(self):
|
|
return "Ordinary person %s" % self.name
|
|
class Engineer(Person):
|
|
def __repr__(self):
|
|
return "Engineer %s, field %s, status %s" % (self.name, self.field, self.status)
|
|
class Manager(Person):
|
|
def __repr__(self):
|
|
return "Manager %s, category %s, status %s" % (self.name, self.category, self.status)
|
|
class Car(PersistentObject):
|
|
def __repr__(self):
|
|
return "Car number %d" % self.car_id
|
|
|
|
# create a union that represents both types of joins.
|
|
employee_join = polymorphic_union(
|
|
{
|
|
'engineer':people.join(engineers),
|
|
'manager':people.join(managers),
|
|
}, "type", 'employee_join')
|
|
|
|
status_mapper = mapper(Status, status)
|
|
person_mapper = mapper(Person, people,
|
|
with_polymorphic=('*', employee_join), polymorphic_on=employee_join.c.type,
|
|
polymorphic_identity='person', properties={'status':relationship(status_mapper)})
|
|
engineer_mapper = mapper(Engineer, engineers, inherits=person_mapper, polymorphic_identity='engineer')
|
|
manager_mapper = mapper(Manager, managers, inherits=person_mapper, polymorphic_identity='manager')
|
|
car_mapper = mapper(Car, cars, properties= {'employee':relationship(person_mapper), 'status':relationship(status_mapper)})
|
|
|
|
session = create_session()
|
|
|
|
active = Status(name="active")
|
|
dead = Status(name="dead")
|
|
|
|
session.add(active)
|
|
session.add(dead)
|
|
session.flush()
|
|
|
|
# TODO: we haven't created assertions for all the data combinations created here
|
|
|
|
# creating 5 managers named from M1 to M5 and 5 engineers named from E1 to E5
|
|
# M4, M5, E4 and E5 are dead
|
|
for i in range(1,5):
|
|
if i<4:
|
|
st=active
|
|
else:
|
|
st=dead
|
|
session.add(Manager(name="M%d" % i,category="YYYYYYYYY",status=st))
|
|
session.add(Engineer(name="E%d" % i,field="X",status=st))
|
|
|
|
session.flush()
|
|
|
|
# get E4
|
|
engineer4 = session.query(engineer_mapper).filter_by(name="E4").one()
|
|
|
|
# create 2 cars for E4, one active and one dead
|
|
car1 = Car(employee=engineer4,status=active)
|
|
car2 = Car(employee=engineer4,status=dead)
|
|
session.add(car1)
|
|
session.add(car2)
|
|
session.flush()
|
|
|
|
# this particular adapt used to cause a recursion overflow;
|
|
# added here for testing
|
|
e = exists([Car.owner], Car.owner==employee_join.c.person_id)
|
|
Query(Person)._adapt_clause(employee_join, False, False)
|
|
|
|
r = session.query(Person).filter(Person.name.like('%2')).join('status').filter_by(name="active").order_by(Person.person_id)
|
|
eq_(str(list(r)), "[Manager M2, category YYYYYYYYY, status Status active, Engineer E2, field X, status Status active]")
|
|
r = session.query(Engineer).join('status').filter(Person.name.in_(['E2', 'E3', 'E4', 'M4', 'M2', 'M1']) & (status.c.name=="active")).order_by(Person.name)
|
|
eq_(str(list(r)), "[Engineer E2, field X, status Status active, Engineer E3, field X, status Status active]")
|
|
|
|
r = session.query(Person).filter(exists([1], Car.owner==Person.person_id))
|
|
eq_(str(list(r)), "[Engineer E4, field X, status Status dead]")
|
|
|
|
class MultiLevelTest(_base.MappedTest):
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
global table_Employee, table_Engineer, table_Manager
|
|
table_Employee = Table( 'Employee', metadata,
|
|
Column( 'name', type_= String(100), ),
|
|
Column( 'id', primary_key= True, type_= Integer, test_needs_autoincrement=True),
|
|
Column( 'atype', type_= String(100), ),
|
|
)
|
|
|
|
table_Engineer = Table( 'Engineer', metadata,
|
|
Column( 'machine', type_= String(100), ),
|
|
Column( 'id', Integer, ForeignKey( 'Employee.id', ), primary_key= True, ),
|
|
)
|
|
|
|
table_Manager = Table( 'Manager', metadata,
|
|
Column( 'duties', type_= String(100), ),
|
|
Column( 'id', Integer, ForeignKey( 'Engineer.id', ), primary_key= True, ),
|
|
)
|
|
def test_threelevels(self):
|
|
class Employee( object):
|
|
def set( me, **kargs):
|
|
for k,v in kargs.iteritems(): setattr( me, k, v)
|
|
return me
|
|
def __str__(me): return str(me.__class__.__name__)+':'+str(me.name)
|
|
__repr__ = __str__
|
|
class Engineer( Employee): pass
|
|
class Manager( Engineer): pass
|
|
|
|
pu_Employee = polymorphic_union( {
|
|
'Manager': table_Employee.join( table_Engineer).join( table_Manager),
|
|
'Engineer': select([table_Employee, table_Engineer.c.machine], table_Employee.c.atype == 'Engineer', from_obj=[table_Employee.join(table_Engineer)]),
|
|
'Employee': table_Employee.select( table_Employee.c.atype == 'Employee'),
|
|
}, None, 'pu_employee', )
|
|
|
|
# pu_Employee = polymorphic_union( {
|
|
# 'Manager': table_Employee.join( table_Engineer).join( table_Manager),
|
|
# 'Engineer': table_Employee.join(table_Engineer).select(table_Employee.c.atype == 'Engineer'),
|
|
# 'Employee': table_Employee.select( table_Employee.c.atype == 'Employee'),
|
|
# }, None, 'pu_employee', )
|
|
|
|
mapper_Employee = mapper( Employee, table_Employee,
|
|
polymorphic_identity= 'Employee',
|
|
polymorphic_on= pu_Employee.c.atype,
|
|
with_polymorphic=('*', pu_Employee),
|
|
)
|
|
|
|
pu_Engineer = polymorphic_union( {
|
|
'Manager': table_Employee.join( table_Engineer).join( table_Manager),
|
|
'Engineer': select([table_Employee, table_Engineer.c.machine], table_Employee.c.atype == 'Engineer', from_obj=[table_Employee.join(table_Engineer)]),
|
|
}, None, 'pu_engineer', )
|
|
mapper_Engineer = mapper( Engineer, table_Engineer,
|
|
inherit_condition= table_Engineer.c.id == table_Employee.c.id,
|
|
inherits= mapper_Employee,
|
|
polymorphic_identity= 'Engineer',
|
|
polymorphic_on= pu_Engineer.c.atype,
|
|
with_polymorphic=('*', pu_Engineer),
|
|
)
|
|
|
|
mapper_Manager = mapper( Manager, table_Manager,
|
|
inherit_condition= table_Manager.c.id == table_Engineer.c.id,
|
|
inherits= mapper_Engineer,
|
|
polymorphic_identity= 'Manager',
|
|
)
|
|
|
|
a = Employee().set( name= 'one')
|
|
b = Engineer().set( egn= 'two', machine= 'any')
|
|
c = Manager().set( name= 'head', machine= 'fast', duties= 'many')
|
|
|
|
session = create_session()
|
|
session.add(a)
|
|
session.add(b)
|
|
session.add(c)
|
|
session.flush()
|
|
assert set(session.query(Employee).all()) == set([a,b,c])
|
|
assert set(session.query( Engineer).all()) == set([b,c])
|
|
assert session.query( Manager).all() == [c]
|
|
|
|
class ManyToManyPolyTest(_base.MappedTest):
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
global base_item_table, item_table, base_item_collection_table, collection_table
|
|
base_item_table = Table(
|
|
'base_item', metadata,
|
|
Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('child_name', String(255), default=None))
|
|
|
|
item_table = Table(
|
|
'item', metadata,
|
|
Column('id', Integer, ForeignKey('base_item.id'), primary_key=True),
|
|
Column('dummy', Integer, default=0)) # Dummy column to avoid weird insert problems
|
|
|
|
base_item_collection_table = Table(
|
|
'base_item_collection', metadata,
|
|
Column('item_id', Integer, ForeignKey('base_item.id')),
|
|
Column('collection_id', Integer, ForeignKey('collection.id')))
|
|
|
|
collection_table = Table(
|
|
'collection', metadata,
|
|
Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
|
|
Column('name', Unicode(255)))
|
|
|
|
def test_pjoin_compile(self):
|
|
"""test that remote_side columns in the secondary join table arent attempted to be
|
|
matched to the target polymorphic selectable"""
|
|
class BaseItem(object): pass
|
|
class Item(BaseItem): pass
|
|
class Collection(object): pass
|
|
item_join = polymorphic_union( {
|
|
'BaseItem':base_item_table.select(base_item_table.c.child_name=='BaseItem'),
|
|
'Item':base_item_table.join(item_table),
|
|
}, None, 'item_join')
|
|
|
|
mapper(
|
|
BaseItem, base_item_table,
|
|
with_polymorphic=('*', item_join),
|
|
polymorphic_on=base_item_table.c.child_name,
|
|
polymorphic_identity='BaseItem',
|
|
properties=dict(collections=relationship(Collection, secondary=base_item_collection_table, backref="items")))
|
|
|
|
mapper(
|
|
Item, item_table,
|
|
inherits=BaseItem,
|
|
polymorphic_identity='Item')
|
|
|
|
mapper(Collection, collection_table)
|
|
|
|
class_mapper(BaseItem)
|
|
|
|
class CustomPKTest(_base.MappedTest):
|
|
@classmethod
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def define_tables(cls, metadata):
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global t1, t2
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t1 = Table('t1', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('type', String(30), nullable=False),
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Column('data', String(30)))
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# note that the primary key column in t2 is named differently
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t2 = Table('t2', metadata,
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Column('t2id', Integer, ForeignKey('t1.id'), primary_key=True),
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Column('t2data', String(30)))
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def test_custompk(self):
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"""test that the primary_key attribute is propagated to the polymorphic mapper"""
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class T1(object):pass
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class T2(T1):pass
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# create a polymorphic union with the select against the base table first.
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# with the join being second, the alias of the union will
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# pick up two "primary key" columns. technically the alias should have a
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# 2-col pk in any case but the leading select has a NULL for the "t2id" column
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d = util.OrderedDict()
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d['t1'] = t1.select(t1.c.type=='t1')
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d['t2'] = t1.join(t2)
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pjoin = polymorphic_union(d, None, 'pjoin')
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mapper(T1, t1, polymorphic_on=t1.c.type, polymorphic_identity='t1', with_polymorphic=('*', pjoin), primary_key=[pjoin.c.id])
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mapper(T2, t2, inherits=T1, polymorphic_identity='t2')
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print [str(c) for c in class_mapper(T1).primary_key]
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ot1 = T1()
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ot2 = T2()
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sess = create_session()
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sess.add(ot1)
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sess.add(ot2)
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sess.flush()
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sess.expunge_all()
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# query using get(), using only one value. this requires the select_table mapper
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# has the same single-col primary key.
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assert sess.query(T1).get(ot1.id).id == ot1.id
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ot1 = sess.query(T1).get(ot1.id)
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ot1.data = 'hi'
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sess.flush()
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def test_pk_collapses(self):
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"""test that a composite primary key attribute formed by a join is "collapsed" into its
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minimal columns"""
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class T1(object):pass
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class T2(T1):pass
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# create a polymorphic union with the select against the base table first.
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# with the join being second, the alias of the union will
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# pick up two "primary key" columns. technically the alias should have a
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# 2-col pk in any case but the leading select has a NULL for the "t2id" column
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d = util.OrderedDict()
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d['t1'] = t1.select(t1.c.type=='t1')
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d['t2'] = t1.join(t2)
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pjoin = polymorphic_union(d, None, 'pjoin')
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mapper(T1, t1, polymorphic_on=t1.c.type, polymorphic_identity='t1', with_polymorphic=('*', pjoin))
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mapper(T2, t2, inherits=T1, polymorphic_identity='t2')
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assert len(class_mapper(T1).primary_key) == 1
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print [str(c) for c in class_mapper(T1).primary_key]
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ot1 = T1()
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ot2 = T2()
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sess = create_session()
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sess.add(ot1)
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sess.add(ot2)
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sess.flush()
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sess.expunge_all()
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# query using get(), using only one value. this requires the select_table mapper
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# has the same single-col primary key.
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assert sess.query(T1).get(ot1.id).id == ot1.id
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ot1 = sess.query(T1).get(ot1.id)
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ot1.data = 'hi'
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sess.flush()
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class InheritingEagerTest(_base.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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global people, employees, tags, peopleTags
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people = Table('people', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('_type', String(30), nullable=False),
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)
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employees = Table('employees', metadata,
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Column('id', Integer, ForeignKey('people.id'),primary_key=True),
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)
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tags = Table('tags', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('label', String(50), nullable=False),
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)
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peopleTags = Table('peopleTags', metadata,
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Column('person_id', Integer,ForeignKey('people.id')),
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Column('tag_id', Integer,ForeignKey('tags.id')),
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)
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def test_basic(self):
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"""test that Query uses the full set of mapper._eager_loaders when generating SQL"""
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class Person(_fixtures.Base):
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pass
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class Employee(Person):
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def __init__(self, name='bob'):
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self.name = name
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class Tag(_fixtures.Base):
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def __init__(self, label):
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self.label = label
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mapper(Person, people, polymorphic_on=people.c._type,polymorphic_identity='person', properties={
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'tags': relationship(Tag, secondary=peopleTags,backref='people', lazy='joined')
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})
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mapper(Employee, employees, inherits=Person,polymorphic_identity='employee')
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mapper(Tag, tags)
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session = create_session()
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bob = Employee()
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session.add(bob)
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tag = Tag('crazy')
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bob.tags.append(tag)
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tag = Tag('funny')
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bob.tags.append(tag)
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session.flush()
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session.expunge_all()
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# query from Employee with limit, query needs to apply eager limiting subquery
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instance = session.query(Employee).filter_by(id=1).limit(1).first()
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assert len(instance.tags) == 2
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class MissingPolymorphicOnTest(_base.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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global tablea, tableb, tablec, tabled
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tablea = Table('tablea', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('adata', String(50)),
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)
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tableb = Table('tableb', metadata,
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Column('id', Integer, primary_key=True, test_needs_autoincrement=True),
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Column('aid', Integer, ForeignKey('tablea.id')),
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Column('data', String(50)),
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)
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tablec = Table('tablec', metadata,
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Column('id', Integer, ForeignKey('tablea.id'), primary_key=True),
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Column('cdata', String(50)),
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)
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tabled = Table('tabled', metadata,
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Column('id', Integer, ForeignKey('tablec.id'), primary_key=True),
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Column('ddata', String(50)),
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)
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def test_polyon_col_setsup(self):
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class A(_fixtures.Base):
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pass
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class B(_fixtures.Base):
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pass
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class C(A):
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pass
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class D(C):
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pass
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poly_select = select([tablea, tableb.c.data.label('discriminator')], from_obj=tablea.join(tableb)).alias('poly')
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mapper(B, tableb)
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mapper(A, tablea, with_polymorphic=('*', poly_select), polymorphic_on=poly_select.c.discriminator, properties={
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'b':relationship(B, uselist=False)
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})
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mapper(C, tablec, inherits=A,polymorphic_identity='c')
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mapper(D, tabled, inherits=C, polymorphic_identity='d')
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c = C(cdata='c1', adata='a1', b=B(data='c'))
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d = D(cdata='c2', adata='a2', ddata='d2', b=B(data='d'))
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sess = create_session()
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sess.add(c)
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sess.add(d)
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sess.flush()
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sess.expunge_all()
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eq_(sess.query(A).all(), [C(cdata='c1', adata='a1'), D(cdata='c2', adata='a2', ddata='d2')])
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