mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-04 23:06:24 -04:00
Mike Bayer
968 lines
31 KiB
Python
968 lines
31 KiB
Python
import testenv; testenv.configure_for_tests()
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from sqlalchemy import *
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from sqlalchemy import exc as sa_exc, util
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from sqlalchemy.orm import *
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from sqlalchemy.orm import exc as orm_exc
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from testlib import *
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from testlib import fixtures
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class O2MTest(ORMTest):
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"""deals with inheritance and one-to-many relationships"""
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def define_tables(self, metadata):
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global foo, bar, blub
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foo = Table('foo', metadata,
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Column('id', Integer, Sequence('foo_seq', optional=True),
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primary_key=True),
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Column('data', String(20)))
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bar = Table('bar', metadata,
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Column('id', Integer, ForeignKey('foo.id'), primary_key=True),
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Column('data', String(20)))
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blub = Table('blub', metadata,
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Column('id', Integer, ForeignKey('bar.id'), primary_key=True),
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Column('foo_id', Integer, ForeignKey('foo.id'), nullable=False),
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Column('data', String(20)))
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def testbasic(self):
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class Foo(object):
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def __init__(self, data=None):
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self.data = data
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def __repr__(self):
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return "Foo id %d, data %s" % (self.id, self.data)
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mapper(Foo, foo)
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class Bar(Foo):
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def __repr__(self):
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return "Bar id %d, data %s" % (self.id, self.data)
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mapper(Bar, bar, inherits=Foo)
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class Blub(Bar):
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def __repr__(self):
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return "Blub id %d, data %s" % (self.id, self.data)
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mapper(Blub, blub, inherits=Bar, properties={
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'parent_foo':relation(Foo)
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})
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sess = create_session()
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b1 = Blub("blub #1")
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b2 = Blub("blub #2")
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f = Foo("foo #1")
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sess.save(b1)
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sess.save(b2)
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sess.save(f)
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b1.parent_foo = f
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b2.parent_foo = f
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sess.flush()
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compare = ','.join([repr(b1), repr(b2), repr(b1.parent_foo), repr(b2.parent_foo)])
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sess.clear()
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l = sess.query(Blub).all()
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result = ','.join([repr(l[0]), repr(l[1]), repr(l[0].parent_foo), repr(l[1].parent_foo)])
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print compare
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print result
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self.assert_(compare == result)
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self.assert_(l[0].parent_foo.data == 'foo #1' and l[1].parent_foo.data == 'foo #1')
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class FalseDiscriminatorTest(ORMTest):
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def define_tables(self, metadata):
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global t1
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t1 = Table('t1', metadata, Column('id', Integer, primary_key=True), Column('type', Integer, nullable=False))
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def test_false_discriminator(self):
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class Foo(object):pass
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class Bar(Foo):pass
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mapper(Foo, t1, polymorphic_on=t1.c.type, polymorphic_identity=1)
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mapper(Bar, inherits=Foo, polymorphic_identity=0)
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sess = create_session()
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f1 = Bar()
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sess.save(f1)
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sess.flush()
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assert f1.type == 0
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sess.clear()
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assert isinstance(sess.query(Foo).one(), Bar)
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class PolymorphicSynonymTest(ORMTest):
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def define_tables(self, 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),
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Column('type', String(10), nullable=False),
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Column('info', Text))
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t2 = Table('t2', metadata,
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Column('id', Integer, ForeignKey('t1.id'), primary_key=True),
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Column('data', String(10), nullable=False))
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def test_polymorphic_synonym(self):
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class T1(fixtures.Base):
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def info(self):
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return "THE INFO IS:" + self._info
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def _set_info(self, x):
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self._info = x
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info = property(info, _set_info)
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class T2(T1):pass
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mapper(T1, t1, polymorphic_on=t1.c.type, polymorphic_identity='t1', properties={
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'info':synonym('_info', map_column=True)
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})
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mapper(T2, t2, inherits=T1, polymorphic_identity='t2')
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sess = create_session()
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at1 = T1(info='at1')
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at2 = T2(info='at2', data='t2 data')
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sess.save(at1)
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sess.save(at2)
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sess.flush()
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sess.clear()
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self.assertEquals(sess.query(T2).filter(T2.info=='at2').one(), at2)
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self.assertEquals(at2.info, "THE INFO IS:at2")
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class CascadeTest(ORMTest):
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"""that cascades on polymorphic relations continue
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cascading along the path of the instance's mapper, not
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the base mapper."""
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def define_tables(self, metadata):
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global t1, t2, t3, t4
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t1= Table('t1', metadata,
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Column('id', Integer, primary_key=True),
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Column('data', String(30))
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)
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t2 = Table('t2', metadata,
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Column('id', Integer, primary_key=True),
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Column('t1id', Integer, ForeignKey('t1.id')),
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Column('type', String(30)),
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Column('data', String(30))
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)
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t3 = Table('t3', metadata,
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Column('id', Integer, ForeignKey('t2.id'), primary_key=True),
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Column('moredata', String(30)))
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t4 = Table('t4', metadata,
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Column('id', Integer, primary_key=True),
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Column('t3id', Integer, ForeignKey('t3.id')),
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Column('data', String(30)))
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def test_cascade(self):
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class T1(fixtures.Base):
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pass
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class T2(fixtures.Base):
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pass
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class T3(T2):
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pass
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class T4(fixtures.Base):
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pass
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mapper(T1, t1, properties={
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't2s':relation(T2, cascade="all")
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})
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mapper(T2, t2, polymorphic_on=t2.c.type, polymorphic_identity='t2')
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mapper(T3, t3, inherits=T2, polymorphic_identity='t3', properties={
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't4s':relation(T4, cascade="all")
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})
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mapper(T4, t4)
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sess = create_session()
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t1_1 = T1(data='t1')
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t3_1 = T3(data ='t3', moredata='t3')
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t2_1 = T2(data='t2')
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t1_1.t2s.append(t2_1)
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t1_1.t2s.append(t3_1)
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t4_1 = T4(data='t4')
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t3_1.t4s.append(t4_1)
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sess.save(t1_1)
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assert t4_1 in sess.new
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sess.flush()
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sess.delete(t1_1)
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assert t4_1 in sess.deleted
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sess.flush()
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class GetTest(ORMTest):
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def define_tables(self, metadata):
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global foo, bar, blub
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foo = Table('foo', metadata,
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Column('id', Integer, Sequence('foo_seq', optional=True),
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primary_key=True),
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Column('type', String(30)),
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Column('data', String(20)))
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bar = Table('bar', metadata,
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Column('id', Integer, ForeignKey('foo.id'), primary_key=True),
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Column('data', String(20)))
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blub = Table('blub', metadata,
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Column('id', Integer, primary_key=True),
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Column('foo_id', Integer, ForeignKey('foo.id')),
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Column('bar_id', Integer, ForeignKey('bar.id')),
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Column('data', String(20)))
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def create_test(polymorphic, name):
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def test_get(self):
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class Foo(object):
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pass
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class Bar(Foo):
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pass
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class Blub(Bar):
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pass
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if polymorphic:
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mapper(Foo, foo, polymorphic_on=foo.c.type, polymorphic_identity='foo')
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mapper(Bar, bar, inherits=Foo, polymorphic_identity='bar')
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mapper(Blub, blub, inherits=Bar, polymorphic_identity='blub')
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else:
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mapper(Foo, foo)
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mapper(Bar, bar, inherits=Foo)
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mapper(Blub, blub, inherits=Bar)
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sess = create_session()
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f = Foo()
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b = Bar()
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bl = Blub()
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sess.save(f)
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sess.save(b)
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sess.save(bl)
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sess.flush()
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if polymorphic:
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def go():
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assert sess.query(Foo).get(f.id) == f
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assert sess.query(Foo).get(b.id) == b
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assert sess.query(Foo).get(bl.id) == bl
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assert sess.query(Bar).get(b.id) == b
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assert sess.query(Bar).get(bl.id) == bl
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assert sess.query(Blub).get(bl.id) == bl
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self.assert_sql_count(testing.db, go, 0)
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else:
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# this is testing the 'wrong' behavior of using get()
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# polymorphically with mappers that are not configured to be
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# polymorphic. the important part being that get() always
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# returns an instance of the query's type.
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def go():
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assert sess.query(Foo).get(f.id) == f
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bb = sess.query(Foo).get(b.id)
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assert isinstance(b, Foo) and bb.id==b.id
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bll = sess.query(Foo).get(bl.id)
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assert isinstance(bll, Foo) and bll.id==bl.id
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assert sess.query(Bar).get(b.id) == b
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bll = sess.query(Bar).get(bl.id)
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assert isinstance(bll, Bar) and bll.id == bl.id
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assert sess.query(Blub).get(bl.id) == bl
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self.assert_sql_count(testing.db, go, 3)
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test_get = _function_named(test_get, name)
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return test_get
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test_get_polymorphic = create_test(True, 'test_get_polymorphic')
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test_get_nonpolymorphic = create_test(False, 'test_get_nonpolymorphic')
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class ConstructionTest(ORMTest):
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def define_tables(self, metadata):
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global content_type, content, product
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content_type = Table('content_type', metadata,
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Column('id', Integer, primary_key=True)
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)
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content = Table('content', metadata,
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Column('id', Integer, primary_key=True),
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Column('content_type_id', Integer, ForeignKey('content_type.id')),
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Column('type', String(30))
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)
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product = Table('product', metadata,
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Column('id', Integer, ForeignKey('content.id'), primary_key=True)
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)
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def testbasic(self):
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class ContentType(object): pass
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class Content(object): pass
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class Product(Content): pass
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content_types = mapper(ContentType, content_type)
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try:
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contents = mapper(Content, content, properties={
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'content_type':relation(content_types)
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}, polymorphic_identity='contents')
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assert False
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except sa_exc.ArgumentError, e:
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assert str(e) == "Mapper 'Mapper|Content|content' specifies a polymorphic_identity of 'contents', but no mapper in it's hierarchy specifies the 'polymorphic_on' column argument"
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def testbackref(self):
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"""tests adding a property to the superclass mapper"""
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class ContentType(object): pass
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class Content(object): pass
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class Product(Content): pass
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contents = mapper(Content, content, polymorphic_on=content.c.type, polymorphic_identity='content')
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products = mapper(Product, product, inherits=contents, polymorphic_identity='product')
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content_types = mapper(ContentType, content_type, properties={
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'content':relation(contents, backref='contenttype')
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})
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p = Product()
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p.contenttype = ContentType()
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# TODO: assertion ??
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class EagerLazyTest(ORMTest):
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"""tests eager load/lazy load of child items off inheritance mappers, tests that
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LazyLoader constructs the right query condition."""
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def define_tables(self, metadata):
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global foo, bar, bar_foo
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foo = Table('foo', metadata,
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Column('id', Integer, Sequence('foo_seq', optional=True),
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primary_key=True),
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Column('data', String(30)))
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bar = Table('bar', metadata,
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Column('id', Integer, ForeignKey('foo.id'), primary_key=True),
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Column('data', String(30)))
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bar_foo = Table('bar_foo', metadata,
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Column('bar_id', Integer, ForeignKey('bar.id')),
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Column('foo_id', Integer, ForeignKey('foo.id'))
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)
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@testing.fails_on('maxdb')
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def testbasic(self):
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class Foo(object): pass
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class Bar(Foo): pass
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foos = mapper(Foo, foo)
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bars = mapper(Bar, bar, inherits=foos)
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bars.add_property('lazy', relation(foos, bar_foo, lazy=True))
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bars.add_property('eager', relation(foos, bar_foo, lazy=False))
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foo.insert().execute(data='foo1')
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bar.insert().execute(id=1, data='bar1')
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foo.insert().execute(data='foo2')
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bar.insert().execute(id=2, data='bar2')
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foo.insert().execute(data='foo3') #3
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foo.insert().execute(data='foo4') #4
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bar_foo.insert().execute(bar_id=1, foo_id=3)
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bar_foo.insert().execute(bar_id=2, foo_id=4)
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sess = create_session()
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q = sess.query(Bar)
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self.assert_(len(q.first().lazy) == 1)
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self.assert_(len(q.first().eager) == 1)
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class FlushTest(ORMTest):
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"""test dependency sorting among inheriting mappers"""
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def define_tables(self, metadata):
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global users, roles, user_roles, admins
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users = Table('users', metadata,
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Column('id', Integer, primary_key=True),
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Column('email', String(128)),
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Column('password', String(16)),
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)
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roles = Table('role', metadata,
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Column('id', Integer, primary_key=True),
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Column('description', String(32))
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)
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user_roles = Table('user_role', metadata,
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Column('user_id', Integer, ForeignKey('users.id'), primary_key=True),
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Column('role_id', Integer, ForeignKey('role.id'), primary_key=True)
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)
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admins = Table('admin', metadata,
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Column('admin_id', Integer, primary_key=True),
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Column('user_id', Integer, ForeignKey('users.id'))
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)
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def testone(self):
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class User(object):pass
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class Role(object):pass
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class Admin(User):pass
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role_mapper = mapper(Role, roles)
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user_mapper = mapper(User, users, properties = {
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'roles' : relation(Role, secondary=user_roles, lazy=False)
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}
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)
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admin_mapper = mapper(Admin, admins, inherits=user_mapper)
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sess = create_session()
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adminrole = Role()
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sess.save(adminrole)
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sess.flush()
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# create an Admin, and append a Role. the dependency processors
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# corresponding to the "roles" attribute for the Admin mapper and the User mapper
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# have to ensure that two dependency processors dont fire off and insert the
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# many to many row twice.
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a = Admin()
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a.roles.append(adminrole)
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a.password = 'admin'
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sess.save(a)
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sess.flush()
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assert user_roles.count().scalar() == 1
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def testtwo(self):
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class User(object):
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def __init__(self, email=None, password=None):
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self.email = email
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self.password = password
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class Role(object):
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def __init__(self, description=None):
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self.description = description
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class Admin(User):pass
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role_mapper = mapper(Role, roles)
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user_mapper = mapper(User, users, properties = {
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'roles' : relation(Role, secondary=user_roles, lazy=False)
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}
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)
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admin_mapper = mapper(Admin, admins, inherits=user_mapper)
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# create roles
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adminrole = Role('admin')
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sess = create_session()
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sess.save(adminrole)
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sess.flush()
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# create admin user
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a = Admin(email='tim', password='admin')
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a.roles.append(adminrole)
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sess.save(a)
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sess.flush()
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a.password = 'sadmin'
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sess.flush()
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assert user_roles.count().scalar() == 1
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class VersioningTest(ORMTest):
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def define_tables(self, metadata):
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global base, subtable, stuff
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base = Table('base', metadata,
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Column('id', Integer, Sequence('version_test_seq', optional=True), primary_key=True ),
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Column('version_id', Integer, nullable=False),
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Column('value', String(40)),
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Column('discriminator', Integer, nullable=False)
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)
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subtable = Table('subtable', metadata,
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Column('id', None, ForeignKey('base.id'), primary_key=True),
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Column('subdata', String(50))
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)
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stuff = Table('stuff', metadata,
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Column('id', Integer, primary_key=True),
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Column('parent', Integer, ForeignKey('base.id'))
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)
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@engines.close_open_connections
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def test_save_update(self):
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class Base(fixtures.Base):
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pass
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class Sub(Base):
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pass
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class Stuff(Base):
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pass
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mapper(Stuff, stuff)
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mapper(Base, base, polymorphic_on=base.c.discriminator, version_id_col=base.c.version_id, polymorphic_identity=1, properties={
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'stuff':relation(Stuff)
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})
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mapper(Sub, subtable, inherits=Base, polymorphic_identity=2)
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sess = create_session()
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b1 = Base(value='b1')
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s1 = Sub(value='sub1', subdata='some subdata')
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sess.save(b1)
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sess.save(s1)
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sess.flush()
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sess2 = create_session()
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s2 = sess2.query(Base).get(s1.id)
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s2.subdata = 'sess2 subdata'
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s1.subdata = 'sess1 subdata'
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sess.flush()
|
|
|
|
try:
|
|
sess2.query(Base).with_lockmode('read').get(s1.id)
|
|
assert False
|
|
except orm_exc.ConcurrentModificationError, e:
|
|
assert True
|
|
|
|
try:
|
|
sess2.flush()
|
|
assert False
|
|
except orm_exc.ConcurrentModificationError, e:
|
|
assert True
|
|
|
|
sess2.refresh(s2)
|
|
assert s2.subdata == 'sess1 subdata'
|
|
s2.subdata = 'sess2 subdata'
|
|
sess2.flush()
|
|
|
|
def test_delete(self):
|
|
class Base(fixtures.Base):
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base, polymorphic_on=base.c.discriminator, version_id_col=base.c.version_id, polymorphic_identity=1)
|
|
mapper(Sub, subtable, inherits=Base, polymorphic_identity=2)
|
|
|
|
sess = create_session()
|
|
|
|
b1 = Base(value='b1')
|
|
s1 = Sub(value='sub1', subdata='some subdata')
|
|
s2 = Sub(value='sub2', subdata='some other subdata')
|
|
sess.save(b1)
|
|
sess.save(s1)
|
|
sess.save(s2)
|
|
|
|
sess.flush()
|
|
|
|
sess2 = create_session()
|
|
s3 = sess2.query(Base).get(s1.id)
|
|
sess2.delete(s3)
|
|
sess2.flush()
|
|
|
|
s2.subdata = 'some new subdata'
|
|
sess.flush()
|
|
|
|
try:
|
|
s1.subdata = 'some new subdata'
|
|
sess.flush()
|
|
assert False
|
|
except orm_exc.ConcurrentModificationError, e:
|
|
assert True
|
|
|
|
class DistinctPKTest(ORMTest):
|
|
"""test the construction of mapper.primary_key when an inheriting relationship
|
|
joins on a column other than primary key column."""
|
|
keep_data = True
|
|
|
|
def define_tables(self, metadata):
|
|
global person_table, employee_table, Person, Employee
|
|
|
|
person_table = Table("persons", metadata,
|
|
Column("id", Integer, primary_key=True),
|
|
Column("name", String(80)),
|
|
)
|
|
|
|
employee_table = Table("employees", metadata,
|
|
Column("id", Integer, primary_key=True),
|
|
Column("salary", Integer),
|
|
Column("person_id", Integer, ForeignKey("persons.id")),
|
|
)
|
|
|
|
class Person(object):
|
|
def __init__(self, name):
|
|
self.name = name
|
|
|
|
class Employee(Person): pass
|
|
|
|
def insert_data(self):
|
|
person_insert = person_table.insert()
|
|
person_insert.execute(id=1, name='alice')
|
|
person_insert.execute(id=2, name='bob')
|
|
|
|
employee_insert = employee_table.insert()
|
|
employee_insert.execute(id=2, salary=250, person_id=1) # alice
|
|
employee_insert.execute(id=3, salary=200, person_id=2) # bob
|
|
|
|
def test_implicit(self):
|
|
person_mapper = mapper(Person, person_table)
|
|
mapper(Employee, employee_table, inherits=person_mapper)
|
|
assert list(class_mapper(Employee).primary_key) == [person_table.c.id]
|
|
|
|
def test_explicit_props(self):
|
|
person_mapper = mapper(Person, person_table)
|
|
mapper(Employee, employee_table, inherits=person_mapper, properties={'pid':person_table.c.id, 'eid':employee_table.c.id})
|
|
self._do_test(True)
|
|
|
|
def test_explicit_composite_pk(self):
|
|
person_mapper = mapper(Person, person_table)
|
|
try:
|
|
mapper(Employee, employee_table, inherits=person_mapper, primary_key=[person_table.c.id, employee_table.c.id])
|
|
self._do_test(True)
|
|
assert False
|
|
except sa_exc.SAWarning, e:
|
|
assert str(e) == "On mapper Mapper|Employee|employees, primary key column 'employees.id' is being combined with distinct primary key column 'persons.id' in attribute 'id'. Use explicit properties to give each column its own mapped attribute name.", str(e)
|
|
|
|
def test_explicit_pk(self):
|
|
person_mapper = mapper(Person, person_table)
|
|
mapper(Employee, employee_table, inherits=person_mapper, primary_key=[person_table.c.id])
|
|
self._do_test(False)
|
|
|
|
def _do_test(self, composite):
|
|
session = create_session()
|
|
query = session.query(Employee)
|
|
|
|
if composite:
|
|
alice1 = query.get([1,2])
|
|
bob = query.get([2,3])
|
|
alice2 = query.get([1,2])
|
|
else:
|
|
alice1 = query.get(1)
|
|
bob = query.get(2)
|
|
alice2 = query.get(1)
|
|
|
|
assert alice1.name == alice2.name == 'alice'
|
|
assert bob.name == 'bob'
|
|
|
|
class SyncCompileTest(ORMTest):
|
|
"""test that syncrules compile properly on custom inherit conds"""
|
|
def define_tables(self, metadata):
|
|
global _a_table, _b_table, _c_table
|
|
|
|
_a_table = Table('a', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('data1', String(128))
|
|
)
|
|
|
|
_b_table = Table('b', metadata,
|
|
Column('a_id', Integer, ForeignKey('a.id'), primary_key=True),
|
|
Column('data2', String(128))
|
|
)
|
|
|
|
_c_table = Table('c', metadata,
|
|
# Column('a_id', Integer, ForeignKey('b.a_id'), primary_key=True), #works
|
|
Column('b_a_id', Integer, ForeignKey('b.a_id'), primary_key=True),
|
|
Column('data3', String(128))
|
|
)
|
|
|
|
def test_joins(self):
|
|
for j1 in (None, _b_table.c.a_id==_a_table.c.id, _a_table.c.id==_b_table.c.a_id):
|
|
for j2 in (None, _b_table.c.a_id==_c_table.c.b_a_id, _c_table.c.b_a_id==_b_table.c.a_id):
|
|
self._do_test(j1, j2)
|
|
for t in _a_table.metadata.table_iterator(reverse=True):
|
|
t.delete().execute().close()
|
|
|
|
def _do_test(self, j1, j2):
|
|
class A(object):
|
|
def __init__(self, **kwargs):
|
|
for key, value in kwargs.items():
|
|
setattr(self, key, value)
|
|
|
|
class B(A):
|
|
pass
|
|
|
|
class C(B):
|
|
pass
|
|
|
|
mapper(A, _a_table)
|
|
mapper(B, _b_table, inherits=A,
|
|
inherit_condition=j1
|
|
)
|
|
mapper(C, _c_table, inherits=B,
|
|
inherit_condition=j2
|
|
)
|
|
|
|
session = create_session()
|
|
|
|
a = A(data1='a1')
|
|
session.save(a)
|
|
|
|
b = B(data1='b1', data2='b2')
|
|
session.save(b)
|
|
|
|
c = C(data1='c1', data2='c2', data3='c3')
|
|
session.save(c)
|
|
|
|
session.flush()
|
|
session.clear()
|
|
|
|
assert len(session.query(A).all()) == 3
|
|
assert len(session.query(B).all()) == 2
|
|
assert len(session.query(C).all()) == 1
|
|
|
|
class OverrideColKeyTest(ORMTest):
|
|
"""test overriding of column attributes."""
|
|
|
|
def define_tables(self, metadata):
|
|
global base, subtable
|
|
|
|
base = Table('base', metadata,
|
|
Column('base_id', Integer, primary_key=True),
|
|
Column('data', String(255)),
|
|
Column('sqlite_fixer', String(10))
|
|
)
|
|
|
|
subtable = Table('subtable', metadata,
|
|
Column('base_id', Integer, ForeignKey('base.base_id'), primary_key=True),
|
|
Column('subdata', String(255))
|
|
)
|
|
|
|
def test_plain(self):
|
|
# control case
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base)
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
# Sub gets a "base_id" property using the "base_id"
|
|
# column of both tables.
|
|
self.assertEquals(
|
|
class_mapper(Sub).get_property('base_id').columns,
|
|
[base.c.base_id, subtable.c.base_id]
|
|
)
|
|
|
|
def test_override_explicit(self):
|
|
# this pattern is what you see when using declarative
|
|
# in particular, here we do a "manual" version of
|
|
# what we'd like the mapper to do.
|
|
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base, properties={
|
|
'id':base.c.base_id
|
|
})
|
|
mapper(Sub, subtable, inherits=Base, properties={
|
|
# this is the manual way to do it, is not really
|
|
# possible in declarative
|
|
'id':[base.c.base_id, subtable.c.base_id]
|
|
})
|
|
|
|
self.assertEquals(
|
|
class_mapper(Sub).get_property('id').columns,
|
|
[base.c.base_id, subtable.c.base_id]
|
|
)
|
|
|
|
s1 = Sub()
|
|
s1.id = 10
|
|
sess = create_session()
|
|
sess.add(s1)
|
|
sess.flush()
|
|
assert sess.query(Sub).get(10) is s1
|
|
|
|
def test_override_onlyinparent(self):
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base, properties={
|
|
'id':base.c.base_id
|
|
})
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
self.assertEquals(
|
|
class_mapper(Sub).get_property('id').columns,
|
|
[base.c.base_id]
|
|
)
|
|
|
|
self.assertEquals(
|
|
class_mapper(Sub).get_property('base_id').columns,
|
|
[subtable.c.base_id]
|
|
)
|
|
|
|
s1 = Sub()
|
|
s1.id = 10
|
|
|
|
s2 = Sub()
|
|
s2.base_id = 15
|
|
|
|
sess = create_session()
|
|
sess.add_all([s1, s2])
|
|
sess.flush()
|
|
|
|
# s1 gets '10'
|
|
assert sess.query(Sub).get(10) is s1
|
|
|
|
# s2 gets a new id, base_id is overwritten by the ultimate
|
|
# PK col
|
|
assert s2.id == s2.base_id != 15
|
|
|
|
def test_override_implicit(self):
|
|
# this is how the pattern looks intuitively when
|
|
# using declarative.
|
|
# fixed as part of [ticket:1111]
|
|
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base, properties={
|
|
'id':base.c.base_id
|
|
})
|
|
mapper(Sub, subtable, inherits=Base, properties={
|
|
'id':subtable.c.base_id
|
|
})
|
|
|
|
# Sub mapper compilation needs to detect that "base.c.base_id"
|
|
# is renamed in the inherited mapper as "id", even though
|
|
# it has its own "id" property. Sub's "id" property
|
|
# gets joined normally with the extra column.
|
|
|
|
self.assertEquals(
|
|
class_mapper(Sub).get_property('id').columns,
|
|
[base.c.base_id, subtable.c.base_id]
|
|
)
|
|
|
|
s1 = Sub()
|
|
s1.id = 10
|
|
sess = create_session()
|
|
sess.add(s1)
|
|
sess.flush()
|
|
assert sess.query(Sub).get(10) is s1
|
|
|
|
def test_plain_descriptor(self):
|
|
"""test that descriptors prevent inheritance from propigating properties to subclasses."""
|
|
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
@property
|
|
def data(self):
|
|
return "im the data"
|
|
|
|
mapper(Base, base)
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
s1 = Sub()
|
|
sess = create_session()
|
|
sess.add(s1)
|
|
sess.flush()
|
|
assert sess.query(Sub).one().data == "im the data"
|
|
|
|
def test_custom_descriptor(self):
|
|
"""test that descriptors prevent inheritance from propigating properties to subclasses."""
|
|
|
|
class MyDesc(object):
|
|
def __get__(self, instance, owner):
|
|
if instance is None:
|
|
return self
|
|
return "im the data"
|
|
|
|
class Base(object):
|
|
pass
|
|
class Sub(Base):
|
|
data = MyDesc()
|
|
|
|
mapper(Base, base)
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
s1 = Sub()
|
|
sess = create_session()
|
|
sess.add(s1)
|
|
sess.flush()
|
|
assert sess.query(Sub).one().data == "im the data"
|
|
|
|
def test_sub_columns_over_base_descriptors(self):
|
|
class Base(object):
|
|
@property
|
|
def subdata(self):
|
|
return "this is base"
|
|
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base)
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
sess = create_session()
|
|
b1 = Base()
|
|
assert b1.subdata == "this is base"
|
|
s1 = Sub()
|
|
s1.subdata = "this is sub"
|
|
assert s1.subdata == "this is sub"
|
|
|
|
sess.add_all([s1, b1])
|
|
sess.flush()
|
|
sess.clear()
|
|
|
|
assert sess.query(Base).get(b1.base_id).subdata == "this is base"
|
|
assert sess.query(Sub).get(s1.base_id).subdata == "this is sub"
|
|
|
|
def test_base_descriptors_over_base_cols(self):
|
|
class Base(object):
|
|
@property
|
|
def data(self):
|
|
return "this is base"
|
|
|
|
class Sub(Base):
|
|
pass
|
|
|
|
mapper(Base, base)
|
|
mapper(Sub, subtable, inherits=Base)
|
|
|
|
sess = create_session()
|
|
b1 = Base()
|
|
assert b1.data == "this is base"
|
|
s1 = Sub()
|
|
assert s1.data == "this is base"
|
|
|
|
sess.add_all([s1, b1])
|
|
sess.flush()
|
|
sess.clear()
|
|
|
|
assert sess.query(Base).get(b1.base_id).data == "this is base"
|
|
assert sess.query(Sub).get(s1.base_id).data == "this is base"
|
|
|
|
|
|
class DeleteOrphanTest(ORMTest):
|
|
def define_tables(self, metadata):
|
|
global single, parent
|
|
single = Table('single', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('type', String(50), nullable=False),
|
|
Column('data', String(50)),
|
|
Column('parent_id', Integer, ForeignKey('parent.id'), nullable=False),
|
|
)
|
|
|
|
parent = Table('parent', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('data', String(50))
|
|
)
|
|
|
|
def test_orphan_message(self):
|
|
class Base(fixtures.Base):
|
|
pass
|
|
|
|
class SubClass(Base):
|
|
pass
|
|
|
|
class Parent(fixtures.Base):
|
|
pass
|
|
|
|
mapper(Base, single, polymorphic_on=single.c.type, polymorphic_identity='base')
|
|
mapper(SubClass, inherits=Base, polymorphic_identity='sub')
|
|
mapper(Parent, parent, properties={
|
|
'related':relation(Base, cascade="all, delete-orphan")
|
|
})
|
|
|
|
sess = create_session()
|
|
s1 = SubClass(data='s1')
|
|
sess.add(s1)
|
|
self.assertRaisesMessage(orm_exc.FlushError,
|
|
"is not attached to any parent 'Parent' instance via that classes' 'related' attribute", sess.flush)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
testenv.main()
|