import warnings from sqlalchemy.testing import eq_, assert_raises, assert_raises_message from sqlalchemy import * from sqlalchemy import exc as sa_exc, util, event from sqlalchemy.orm import * from sqlalchemy.orm.util import instance_str from sqlalchemy.orm import exc as orm_exc, attributes from sqlalchemy.testing.assertsql import AllOf, CompiledSQL, Or from sqlalchemy.sql import table, column from sqlalchemy import testing from sqlalchemy.testing import engines from sqlalchemy.testing import fixtures from test.orm import _fixtures from sqlalchemy.testing.schema import Table, Column from sqlalchemy import inspect from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.testing.util import gc_collect class O2MTest(fixtures.MappedTest): """deals with inheritance and one-to-many relationships""" @classmethod def define_tables(cls, metadata): global foo, bar, blub foo = Table('foo', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('data', String(20))) bar = Table('bar', metadata, Column('id', Integer, ForeignKey('foo.id'), primary_key=True), Column('bar_data', String(20))) blub = Table('blub', metadata, Column('id', Integer, ForeignKey('bar.id'), primary_key=True), Column('foo_id', Integer, ForeignKey('foo.id'), nullable=False), Column('blub_data', String(20))) def test_basic(self): class Foo(object): def __init__(self, data=None): self.data = data def __repr__(self): return "Foo id %d, data %s" % (self.id, self.data) mapper(Foo, foo) class Bar(Foo): def __repr__(self): return "Bar id %d, data %s" % (self.id, self.data) mapper(Bar, bar, inherits=Foo) class Blub(Bar): def __repr__(self): return "Blub id %d, data %s" % (self.id, self.data) mapper(Blub, blub, inherits=Bar, properties={ 'parent_foo':relationship(Foo) }) sess = create_session() b1 = Blub("blub #1") b2 = Blub("blub #2") f = Foo("foo #1") sess.add(b1) sess.add(b2) sess.add(f) b1.parent_foo = f b2.parent_foo = f sess.flush() compare = ','.join([repr(b1), repr(b2), repr(b1.parent_foo), repr(b2.parent_foo)]) sess.expunge_all() l = sess.query(Blub).all() result = ','.join([repr(l[0]), repr(l[1]), repr(l[0].parent_foo), repr(l[1].parent_foo)]) eq_(compare, result) eq_(l[0].parent_foo.data, 'foo #1') eq_(l[1].parent_foo.data, 'foo #1') class PolymorphicResolutionMultiLevel(fixtures.DeclarativeMappedTest, testing.AssertsCompiledSQL): run_setup_mappers = 'once' __dialect__ = 'default' @classmethod def setup_classes(cls): Base = cls.DeclarativeBasic class A(Base): __tablename__ = 'a' id = Column(Integer, primary_key=True) class B(A): __tablename__ = 'b' id = Column(Integer, ForeignKey('a.id'), primary_key=True) class C(A): __tablename__ = 'c' id = Column(Integer, ForeignKey('a.id'), primary_key=True) class D(B): __tablename__ = 'd' id = Column(Integer, ForeignKey('b.id'), primary_key=True) def test_ordered_b_d(self): a_mapper = inspect(self.classes.A) eq_( a_mapper._mappers_from_spec( [self.classes.B, self.classes.D], None), [a_mapper, inspect(self.classes.B), inspect(self.classes.D)] ) def test_a(self): a_mapper = inspect(self.classes.A) eq_( a_mapper._mappers_from_spec( [self.classes.A], None), [a_mapper] ) def test_b_d_selectable(self): a_mapper = inspect(self.classes.A) spec = [self.classes.D, self.classes.B] eq_( a_mapper._mappers_from_spec( spec, self.classes.B.__table__.join(self.classes.D.__table__) ), [inspect(self.classes.B), inspect(self.classes.D)] ) def test_d_selectable(self): a_mapper = inspect(self.classes.A) spec = [self.classes.D] eq_( a_mapper._mappers_from_spec( spec, self.classes.B.__table__.join(self.classes.D.__table__) ), [inspect(self.classes.D)] ) def test_reverse_d_b(self): a_mapper = inspect(self.classes.A) spec = [self.classes.D, self.classes.B] eq_( a_mapper._mappers_from_spec( spec, None), [a_mapper, inspect(self.classes.B), inspect(self.classes.D)] ) mappers, selectable = a_mapper._with_polymorphic_args(spec=spec) self.assert_compile(selectable, "a LEFT OUTER JOIN b ON a.id = b.id " "LEFT OUTER JOIN d ON b.id = d.id") def test_d_b_missing(self): a_mapper = inspect(self.classes.A) spec = [self.classes.D] eq_( a_mapper._mappers_from_spec( spec, None), [a_mapper, inspect(self.classes.B), inspect(self.classes.D)] ) mappers, selectable = a_mapper._with_polymorphic_args(spec=spec) self.assert_compile(selectable, "a LEFT OUTER JOIN b ON a.id = b.id " "LEFT OUTER JOIN d ON b.id = d.id") def test_d_c_b(self): a_mapper = inspect(self.classes.A) spec = [self.classes.D, self.classes.C, self.classes.B] ms = a_mapper._mappers_from_spec(spec, None) eq_( ms[-1], inspect(self.classes.D) ) eq_(ms[0], a_mapper) eq_( set(ms[1:3]), set(a_mapper._inheriting_mappers) ) class PolymorphicOnNotLocalTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): t1 = Table('t1', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('x', String(10)), Column('q', String(10))) t2 = Table('t2', metadata, Column('t2id', Integer, primary_key=True, test_needs_autoincrement=True), Column('y', String(10)), Column('xid', ForeignKey('t1.id'))) @classmethod def setup_classes(cls): class Parent(cls.Comparable): pass class Child(Parent): pass def test_non_col_polymorphic_on(self): Parent = self.classes.Parent t2 = self.tables.t2 assert_raises_message( sa_exc.ArgumentError, "Can't determine polymorphic_on " "value 'im not a column' - no " "attribute is mapped to this name.", mapper, Parent, t2, polymorphic_on="im not a column" ) def test_polymorphic_on_non_expr_prop(self): t2, t1 = self.tables.t2, self.tables.t1 Parent = self.classes.Parent t1t2_join = select([t1.c.x], from_obj=[t1.join(t2)]).alias() def go(): interface_m = mapper(Parent, t2, polymorphic_on=lambda:"hi", polymorphic_identity=0) assert_raises_message( sa_exc.ArgumentError, "Only direct column-mapped property or " "SQL expression can be passed for polymorphic_on", go ) def test_polymorphic_on_not_present_col(self): t2, t1 = self.tables.t2, self.tables.t1 Parent = self.classes.Parent t1t2_join = select([t1.c.x], from_obj=[t1.join(t2)]).alias() def go(): t1t2_join_2 = select([t1.c.q], from_obj=[t1.join(t2)]).alias() interface_m = mapper(Parent, t2, polymorphic_on=t1t2_join.c.x, with_polymorphic=('*', t1t2_join_2), polymorphic_identity=0) assert_raises_message( sa_exc.InvalidRequestError, "Could not map polymorphic_on column 'x' to the mapped table - " "polymorphic loads will not function properly", go ) def test_polymorphic_on_only_in_with_poly(self): t2, t1 = self.tables.t2, self.tables.t1 Parent = self.classes.Parent t1t2_join = select([t1.c.x], from_obj=[t1.join(t2)]).alias() # if its in the with_polymorphic, then its OK mapper(Parent, t2, polymorphic_on=t1t2_join.c.x, with_polymorphic=('*', t1t2_join), polymorphic_identity=0) def test_polymorpic_on_not_in_with_poly(self): t2, t1 = self.tables.t2, self.tables.t1 Parent = self.classes.Parent t1t2_join = select([t1.c.x], from_obj=[t1.join(t2)]).alias() # if with_polymorphic, but its not present, not OK def go(): t1t2_join_2 = select([t1.c.q], from_obj=[t1.join(t2)]).alias() interface_m = mapper(Parent, t2, polymorphic_on=t1t2_join.c.x, with_polymorphic=('*', t1t2_join_2), polymorphic_identity=0) assert_raises_message( sa_exc.InvalidRequestError, "Could not map polymorphic_on column 'x' " "to the mapped table - " "polymorphic loads will not function properly", go ) def test_polymorphic_on_expr_explicit_map(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]) mapper(Parent, t1, properties={ "discriminator":column_property(expr) }, polymorphic_identity="parent", polymorphic_on=expr) mapper(Child, t2, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_expr_implicit_map_no_label_joined(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]) mapper(Parent, t1, polymorphic_identity="parent", polymorphic_on=expr) mapper(Child, t2, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_expr_implicit_map_w_label_joined(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]).label(None) mapper(Parent, t1, polymorphic_identity="parent", polymorphic_on=expr) mapper(Child, t2, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_expr_implicit_map_no_label_single(self): """test that single_table_criterion is propagated with a standalone expr""" t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]) mapper(Parent, t1, polymorphic_identity="parent", polymorphic_on=expr) mapper(Child, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_expr_implicit_map_w_label_single(self): """test that single_table_criterion is propagated with a standalone expr""" t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]).label(None) mapper(Parent, t1, polymorphic_identity="parent", polymorphic_on=expr) mapper(Child, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_column_prop(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]) cprop = column_property(expr) mapper(Parent, t1, properties={ "discriminator":cprop }, polymorphic_identity="parent", polymorphic_on=cprop) mapper(Child, t2, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_column_str_prop(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child expr = case([ (t1.c.x=="p", "parent"), (t1.c.x=="c", "child"), ]) cprop = column_property(expr) mapper(Parent, t1, properties={ "discriminator":cprop }, polymorphic_identity="parent", polymorphic_on="discriminator") mapper(Child, t2, inherits=Parent, polymorphic_identity="child") self._roundtrip(parent_ident='p', child_ident='c') def test_polymorphic_on_synonym(self): t2, t1 = self.tables.t2, self.tables.t1 Parent, Child = self.classes.Parent, self.classes.Child cprop = column_property(t1.c.x) assert_raises_message( sa_exc.ArgumentError, "Only direct column-mapped property or " "SQL expression can be passed for polymorphic_on", mapper, Parent, t1, properties={ "discriminator":cprop, "discrim_syn":synonym(cprop) }, polymorphic_identity="parent", polymorphic_on="discrim_syn") def _roundtrip(self, set_event=True, parent_ident='parent', child_ident='child'): Parent, Child = self.classes.Parent, self.classes.Child if set_event: @event.listens_for(Parent, "init", propagate=True) def set_identity(instance, *arg, **kw): ident = object_mapper(instance).polymorphic_identity if ident == 'parent': instance.x = parent_ident elif ident == 'child': instance.x = child_ident else: assert False, "Got unexpected identity %r" % ident s = Session(testing.db) s.add_all([ Parent(q="p1"), Child(q="c1", y="c1"), Parent(q="p2"), ]) s.commit() s.close() eq_( [type(t) for t in s.query(Parent).order_by(Parent.id)], [Parent, Child, Parent] ) eq_( [type(t) for t in s.query(Child).all()], [Child] ) class SortOnlyOnImportantFKsTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): Table('a', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('b_id', Integer, ForeignKey('b.id', use_alter=True, name='b')) ) Table('b', metadata, Column('id', Integer, ForeignKey('a.id'), primary_key=True) ) @classmethod def setup_classes(cls): Base = declarative_base() class A(Base): __tablename__ = "a" id = Column(Integer, primary_key=True, test_needs_autoincrement=True) b_id = Column(Integer, ForeignKey('b.id')) class B(A): __tablename__ = "b" id = Column(Integer, ForeignKey('a.id'), primary_key=True) __mapper_args__ = {'inherit_condition': id == A.id} cls.classes.A = A cls.classes.B = B def test_flush(self): s = Session(testing.db) s.add(self.classes.B()) s.flush() class FalseDiscriminatorTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): global t1 t1 = Table('t1', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', Boolean, nullable=False)) def test_false_on_sub(self): class Foo(object): pass class Bar(Foo): pass mapper(Foo, t1, polymorphic_on=t1.c.type, polymorphic_identity=True) mapper(Bar, inherits=Foo, polymorphic_identity=False) sess = create_session() b1 = Bar() sess.add(b1) sess.flush() assert b1.type is False sess.expunge_all() assert isinstance(sess.query(Foo).one(), Bar) def test_false_on_base(self): class Ding(object):pass class Bat(Ding):pass mapper(Ding, t1, polymorphic_on=t1.c.type, polymorphic_identity=False) mapper(Bat, inherits=Ding, polymorphic_identity=True) sess = create_session() d1 = Ding() sess.add(d1) sess.flush() assert d1.type is False sess.expunge_all() assert sess.query(Ding).one() is not None class PolymorphicSynonymTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): global t1, t2 t1 = Table('t1', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', String(10), nullable=False), Column('info', String(255))) t2 = Table('t2', metadata, Column('id', Integer, ForeignKey('t1.id'), primary_key=True), Column('data', String(10), nullable=False)) def test_polymorphic_synonym(self): class T1(fixtures.ComparableEntity): def info(self): return "THE INFO IS:" + self._info def _set_info(self, x): self._info = x info = property(info, _set_info) class T2(T1):pass mapper(T1, t1, polymorphic_on=t1.c.type, polymorphic_identity='t1', properties={ 'info':synonym('_info', map_column=True) }) mapper(T2, t2, inherits=T1, polymorphic_identity='t2') sess = create_session() at1 = T1(info='at1') at2 = T2(info='at2', data='t2 data') sess.add(at1) sess.add(at2) sess.flush() sess.expunge_all() eq_(sess.query(T2).filter(T2.info=='at2').one(), at2) eq_(at2.info, "THE INFO IS:at2") class PolymorphicAttributeManagementTest(fixtures.MappedTest): """Test polymorphic_on can be assigned, can be mirrored, etc.""" run_setup_mappers = 'once' @classmethod def define_tables(cls, metadata): Table('table_a', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('class_name', String(50)) ) Table('table_b', metadata, Column('id', Integer, ForeignKey('table_a.id'), primary_key=True), Column('class_name', String(50)), ) Table('table_c', metadata, Column('id', Integer, ForeignKey('table_b.id'), primary_key=True), Column('data', String(10)) ) @classmethod def setup_classes(cls): table_b, table_c, table_a = (cls.tables.table_b, cls.tables.table_c, cls.tables.table_a) class A(cls.Basic): pass class B(A): pass class C(B): pass class D(B): pass mapper(A, table_a, polymorphic_on=table_a.c.class_name, polymorphic_identity='a') mapper(B, table_b, inherits=A, polymorphic_on=table_b.c.class_name, polymorphic_identity='b', properties=dict(class_name=[table_a.c.class_name, table_b.c.class_name])) mapper(C, table_c, inherits=B, polymorphic_identity='c') mapper(D, inherits=B, polymorphic_identity='d') def test_poly_configured_immediate(self): A, C, B = (self.classes.A, self.classes.C, self.classes.B) a = A() b = B() c = C() eq_(a.class_name, 'a') eq_(b.class_name, 'b') eq_(c.class_name, 'c') def test_base_class(self): A, C, B = (self.classes.A, self.classes.C, self.classes.B) sess = Session() c1 = C() sess.add(c1) sess.commit() assert isinstance(sess.query(B).first(), C) sess.close() assert isinstance(sess.query(A).first(), C) def test_valid_assignment_upwards(self): """test that we can assign 'd' to a B, since B/D both involve the same set of tables. """ D, B = self.classes.D, self.classes.B sess = Session() b1 = B() b1.class_name = 'd' sess.add(b1) sess.commit() sess.close() assert isinstance(sess.query(B).first(), D) def test_invalid_assignment_downwards(self): """test that we warn on assign of 'b' to a C, since this adds a row to the C table we'd never load. """ C = self.classes.C sess = Session() c1 = C() c1.class_name = 'b' sess.add(c1) assert_raises_message( sa_exc.SAWarning, "Flushing object %s with incompatible " "polymorphic identity 'b'; the object may not " "refresh and/or load correctly" % instance_str(c1), sess.flush ) def test_invalid_assignment_upwards(self): """test that we warn on assign of 'c' to a B, since we will have a "C" row that has no joined row, which will cause object deleted errors. """ B = self.classes.B sess = Session() b1 = B() b1.class_name = 'c' sess.add(b1) assert_raises_message( sa_exc.SAWarning, "Flushing object %s with incompatible " "polymorphic identity 'c'; the object may not " "refresh and/or load correctly" % instance_str(b1), sess.flush ) def test_entirely_oob_assignment(self): """test warn on an unknown polymorphic identity. """ B = self.classes.B sess = Session() b1 = B() b1.class_name = 'xyz' sess.add(b1) assert_raises_message( sa_exc.SAWarning, "Flushing object %s with incompatible " "polymorphic identity 'xyz'; the object may not " "refresh and/or load correctly" % instance_str(b1), sess.flush ) def test_not_set_on_upate(self): C = self.classes.C sess = Session() c1 = C() sess.add(c1) sess.commit() sess.expire(c1) c1.data = 'foo' sess.flush() def test_validate_on_upate(self): C = self.classes.C sess = Session() c1 = C() sess.add(c1) sess.commit() sess.expire(c1) c1.class_name = 'b' assert_raises_message( sa_exc.SAWarning, "Flushing object %s with incompatible " "polymorphic identity 'b'; the object may not " "refresh and/or load correctly" % instance_str(c1), sess.flush ) class CascadeTest(fixtures.MappedTest): """that cascades on polymorphic relationships continue cascading along the path of the instance's mapper, not the base mapper.""" @classmethod def define_tables(cls, metadata): global t1, t2, t3, t4 t1= Table('t1', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('data', String(30)) ) t2 = Table('t2', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('t1id', Integer, ForeignKey('t1.id')), Column('type', String(30)), Column('data', String(30)) ) t3 = Table('t3', metadata, Column('id', Integer, ForeignKey('t2.id'), primary_key=True), Column('moredata', String(30))) t4 = Table('t4', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('t3id', Integer, ForeignKey('t3.id')), Column('data', String(30))) def test_cascade(self): class T1(fixtures.BasicEntity): pass class T2(fixtures.BasicEntity): pass class T3(T2): pass class T4(fixtures.BasicEntity): pass mapper(T1, t1, properties={ 't2s':relationship(T2, cascade="all") }) mapper(T2, t2, polymorphic_on=t2.c.type, polymorphic_identity='t2') mapper(T3, t3, inherits=T2, polymorphic_identity='t3', properties={ 't4s':relationship(T4, cascade="all") }) mapper(T4, t4) sess = create_session() t1_1 = T1(data='t1') t3_1 = T3(data ='t3', moredata='t3') t2_1 = T2(data='t2') t1_1.t2s.append(t2_1) t1_1.t2s.append(t3_1) t4_1 = T4(data='t4') t3_1.t4s.append(t4_1) sess.add(t1_1) assert t4_1 in sess.new sess.flush() sess.delete(t1_1) assert t4_1 in sess.deleted sess.flush() class M2OUseGetTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): Table('base', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', String(30)) ) Table('sub', metadata, Column('id', Integer, ForeignKey('base.id'), primary_key=True), ) Table('related', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('sub_id', Integer, ForeignKey('sub.id')), ) def test_use_get(self): base, sub, related = (self.tables.base, self.tables.sub, self.tables.related) # test [ticket:1186] class Base(fixtures.BasicEntity): pass class Sub(Base): pass class Related(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='b') mapper(Sub, sub, inherits=Base, polymorphic_identity='s') mapper(Related, related, properties={ # previously, this was needed for the comparison to occur: # the 'primaryjoin' looks just like "Sub"'s "get" clause (based on the Base id), # and foreign_keys since that join condition doesn't actually have any fks in it #'sub':relationship(Sub, primaryjoin=base.c.id==related.c.sub_id, foreign_keys=related.c.sub_id) # now we can use this: 'sub':relationship(Sub) }) assert class_mapper(Related).get_property('sub').strategy.use_get sess = create_session() s1 = Sub() r1 = Related(sub=s1) sess.add(r1) sess.flush() sess.expunge_all() r1 = sess.query(Related).first() s1 = sess.query(Sub).first() def go(): assert r1.sub self.assert_sql_count(testing.db, go, 0) class GetTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): global foo, bar, blub foo = Table('foo', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', String(30)), Column('data', String(20))) bar = Table('bar', metadata, Column('id', Integer, ForeignKey('foo.id'), primary_key=True), Column('bar_data', String(20))) blub = Table('blub', metadata, Column('blub_id', Integer, primary_key=True, test_needs_autoincrement=True), Column('foo_id', Integer, ForeignKey('foo.id')), Column('bar_id', Integer, ForeignKey('bar.id')), Column('blub_data', String(20))) @classmethod def setup_classes(cls): class Foo(cls.Basic): pass class Bar(Foo): pass class Blub(Bar): pass def test_get_polymorphic(self): self._do_get_test(True) def test_get_nonpolymorphic(self): self._do_get_test(False) def _do_get_test(self, polymorphic): foo, Bar, Blub, blub, bar, Foo = (self.tables.foo, self.classes.Bar, self.classes.Blub, self.tables.blub, self.tables.bar, self.classes.Foo) if polymorphic: mapper(Foo, foo, polymorphic_on=foo.c.type, polymorphic_identity='foo') mapper(Bar, bar, inherits=Foo, polymorphic_identity='bar') mapper(Blub, blub, inherits=Bar, polymorphic_identity='blub') else: mapper(Foo, foo) mapper(Bar, bar, inherits=Foo) mapper(Blub, blub, inherits=Bar) sess = create_session() f = Foo() b = Bar() bl = Blub() sess.add(f) sess.add(b) sess.add(bl) sess.flush() if polymorphic: def go(): assert sess.query(Foo).get(f.id) is f assert sess.query(Foo).get(b.id) is b assert sess.query(Foo).get(bl.id) is bl assert sess.query(Bar).get(b.id) is b assert sess.query(Bar).get(bl.id) is bl assert sess.query(Blub).get(bl.id) is bl # test class mismatches - item is present # in the identity map but we requested a subclass assert sess.query(Blub).get(f.id) is None assert sess.query(Blub).get(b.id) is None assert sess.query(Bar).get(f.id) is None self.assert_sql_count(testing.db, go, 0) else: # this is testing the 'wrong' behavior of using get() # polymorphically with mappers that are not configured to be # polymorphic. the important part being that get() always # returns an instance of the query's type. def go(): assert sess.query(Foo).get(f.id) is f bb = sess.query(Foo).get(b.id) assert isinstance(b, Foo) and bb.id==b.id bll = sess.query(Foo).get(bl.id) assert isinstance(bll, Foo) and bll.id==bl.id assert sess.query(Bar).get(b.id) is b bll = sess.query(Bar).get(bl.id) assert isinstance(bll, Bar) and bll.id == bl.id assert sess.query(Blub).get(bl.id) is bl self.assert_sql_count(testing.db, go, 3) class EagerLazyTest(fixtures.MappedTest): """tests eager load/lazy load of child items off inheritance mappers, tests that LazyLoader constructs the right query condition.""" @classmethod def define_tables(cls, metadata): global foo, bar, bar_foo foo = Table('foo', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('data', String(30))) bar = Table('bar', metadata, Column('id', Integer, ForeignKey('foo.id'), primary_key=True), Column('bar_data', String(30))) bar_foo = Table('bar_foo', metadata, Column('bar_id', Integer, ForeignKey('bar.id')), Column('foo_id', Integer, ForeignKey('foo.id')) ) def test_basic(self): class Foo(object): pass class Bar(Foo): pass foos = mapper(Foo, foo) bars = mapper(Bar, bar, inherits=foos) bars.add_property('lazy', relationship(foos, bar_foo, lazy='select')) bars.add_property('eager', relationship(foos, bar_foo, lazy='joined')) foo.insert().execute(data='foo1') bar.insert().execute(id=1, data='bar1') foo.insert().execute(data='foo2') bar.insert().execute(id=2, data='bar2') foo.insert().execute(data='foo3') #3 foo.insert().execute(data='foo4') #4 bar_foo.insert().execute(bar_id=1, foo_id=3) bar_foo.insert().execute(bar_id=2, foo_id=4) sess = create_session() q = sess.query(Bar) self.assert_(len(q.first().lazy) == 1) self.assert_(len(q.first().eager) == 1) class EagerTargetingTest(fixtures.MappedTest): """test a scenario where joined table inheritance might be confused as an eagerly loaded joined table.""" @classmethod def define_tables(cls, metadata): Table('a_table', metadata, Column('id', Integer, primary_key=True), Column('name', String(50)), Column('type', String(30), nullable=False), Column('parent_id', Integer, ForeignKey('a_table.id')) ) Table('b_table', metadata, Column('id', Integer, ForeignKey('a_table.id'), primary_key=True), Column('b_data', String(50)), ) def test_adapt_stringency(self): b_table, a_table = self.tables.b_table, self.tables.a_table class A(fixtures.ComparableEntity): pass class B(A): pass mapper(A, a_table, polymorphic_on=a_table.c.type, polymorphic_identity='A', properties={ 'children': relationship(A, order_by=a_table.c.name) }) mapper(B, b_table, inherits=A, polymorphic_identity='B', properties={ 'b_derived':column_property(b_table.c.b_data + "DATA") }) sess=create_session() b1=B(id=1, name='b1',b_data='i') sess.add(b1) sess.flush() b2=B(id=2, name='b2', b_data='l', parent_id=1) sess.add(b2) sess.flush() bid=b1.id sess.expunge_all() node = sess.query(B).filter(B.id==bid).all()[0] eq_(node, B(id=1, name='b1',b_data='i')) eq_(node.children[0], B(id=2, name='b2',b_data='l')) sess.expunge_all() node = sess.query(B).options(joinedload(B.children)).filter(B.id==bid).all()[0] eq_(node, B(id=1, name='b1',b_data='i')) eq_(node.children[0], B(id=2, name='b2',b_data='l')) class FlushTest(fixtures.MappedTest): """test dependency sorting among inheriting mappers""" @classmethod def define_tables(cls, metadata): Table('users', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('email', String(128)), Column('password', String(16)), ) Table('roles', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('description', String(32)) ) Table('user_roles', metadata, Column('user_id', Integer, ForeignKey('users.id'), primary_key=True), Column('role_id', Integer, ForeignKey('roles.id'), primary_key=True) ) Table('admins', metadata, Column('admin_id', Integer, primary_key=True, test_needs_autoincrement=True), Column('user_id', Integer, ForeignKey('users.id')) ) def test_one(self): admins, users, roles, user_roles = (self.tables.admins, self.tables.users, self.tables.roles, self.tables.user_roles) class User(object):pass class Role(object):pass class Admin(User):pass role_mapper = mapper(Role, roles) user_mapper = mapper(User, users, properties = { 'roles' : relationship(Role, secondary=user_roles, lazy='joined') } ) admin_mapper = mapper(Admin, admins, inherits=user_mapper) sess = create_session() adminrole = Role() sess.add(adminrole) sess.flush() # create an Admin, and append a Role. the dependency processors # corresponding to the "roles" attribute for the Admin mapper and the User mapper # have to ensure that two dependency processors don't fire off and insert the # many to many row twice. a = Admin() a.roles.append(adminrole) a.password = 'admin' sess.add(a) sess.flush() assert user_roles.count().scalar() == 1 def test_two(self): admins, users, roles, user_roles = (self.tables.admins, self.tables.users, self.tables.roles, self.tables.user_roles) class User(object): def __init__(self, email=None, password=None): self.email = email self.password = password class Role(object): def __init__(self, description=None): self.description = description class Admin(User):pass role_mapper = mapper(Role, roles) user_mapper = mapper(User, users, properties = { 'roles' : relationship(Role, secondary=user_roles, lazy='joined') } ) admin_mapper = mapper(Admin, admins, inherits=user_mapper) # create roles adminrole = Role('admin') sess = create_session() sess.add(adminrole) sess.flush() # create admin user a = Admin(email='tim', password='admin') a.roles.append(adminrole) sess.add(a) sess.flush() a.password = 'sadmin' sess.flush() assert user_roles.count().scalar() == 1 class OptimizedGetOnDeferredTest(fixtures.MappedTest): """test that the 'optimized get' path accommodates deferred columns.""" @classmethod def define_tables(cls, metadata): Table( "a", metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True) ) Table( "b", metadata, Column('id', Integer, ForeignKey('a.id'), primary_key=True), Column('data', String(10)) ) @classmethod def setup_classes(cls): class A(cls.Basic): pass class B(A): pass @classmethod def setup_mappers(cls): A, B = cls.classes("A", "B") a, b = cls.tables("a", "b") mapper(A, a) mapper(B, b, inherits=A, properties={ 'data': deferred(b.c.data), 'expr': column_property(b.c.data + 'q', deferred=True) }) def test_column_property(self): A, B = self.classes("A", "B") sess = Session() b1 = B(data='x') sess.add(b1) sess.flush() eq_(b1.expr, 'xq') def test_expired_column(self): A, B = self.classes("A", "B") sess = Session() b1 = B(data='x') sess.add(b1) sess.flush() sess.expire(b1, ['data']) eq_(b1.data, 'x') class JoinedNoFKSortingTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): Table("a", metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True) ) Table("b", metadata, Column('id', Integer, primary_key=True) ) Table("c", metadata, Column('id', Integer, primary_key=True) ) @classmethod def setup_classes(cls): class A(cls.Basic): pass class B(A): pass class C(A): pass @classmethod def setup_mappers(cls): A, B, C = cls.classes.A, cls.classes.B, cls.classes.C mapper(A, cls.tables.a) mapper(B, cls.tables.b, inherits=A, inherit_condition=cls.tables.a.c.id == cls.tables.b.c.id, inherit_foreign_keys=cls.tables.b.c.id) mapper(C, cls.tables.c, inherits=A, inherit_condition=cls.tables.a.c.id == cls.tables.c.c.id, inherit_foreign_keys=cls.tables.c.c.id) def test_ordering(self): B, C = self.classes.B, self.classes.C sess = Session() sess.add_all([B(), C(), B(), C()]) self.assert_sql_execution( testing.db, sess.flush, CompiledSQL( "INSERT INTO a () VALUES ()", {} ), CompiledSQL( "INSERT INTO a () VALUES ()", {} ), CompiledSQL( "INSERT INTO a () VALUES ()", {} ), CompiledSQL( "INSERT INTO a () VALUES ()", {} ), AllOf( CompiledSQL( "INSERT INTO b (id) VALUES (:id)", [{"id": 1}, {"id": 3}] ), CompiledSQL( "INSERT INTO c (id) VALUES (:id)", [{"id": 2}, {"id": 4}] ) ) ) class VersioningTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): Table('base', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('version_id', Integer, nullable=False), Column('value', String(40)), Column('discriminator', Integer, nullable=False) ) Table('subtable', metadata, Column('id', None, ForeignKey('base.id'), primary_key=True), Column('subdata', String(50)) ) Table('stuff', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('parent', Integer, ForeignKey('base.id')) ) @testing.emits_warning(r".*updated rowcount") @engines.close_open_connections def test_save_update(self): subtable, base, stuff = (self.tables.subtable, self.tables.base, self.tables.stuff) class Base(fixtures.BasicEntity): pass class Sub(Base): pass class Stuff(Base): pass mapper(Stuff, stuff) mapper(Base, base, polymorphic_on=base.c.discriminator, version_id_col=base.c.version_id, polymorphic_identity=1, properties={ 'stuff':relationship(Stuff) }) mapper(Sub, subtable, inherits=Base, polymorphic_identity=2) sess = create_session() b1 = Base(value='b1') s1 = Sub(value='sub1', subdata='some subdata') sess.add(b1) sess.add(s1) sess.flush() sess2 = create_session() s2 = sess2.query(Base).get(s1.id) s2.subdata = 'sess2 subdata' s1.subdata = 'sess1 subdata' sess.flush() assert_raises(orm_exc.StaleDataError, sess2.query(Base).with_lockmode('read').get, s1.id) if not testing.db.dialect.supports_sane_rowcount: sess2.flush() else: assert_raises(orm_exc.StaleDataError, sess2.flush) sess2.refresh(s2) if testing.db.dialect.supports_sane_rowcount: assert s2.subdata == 'sess1 subdata' s2.subdata = 'sess2 subdata' sess2.flush() @testing.emits_warning(r".*(update|delete)d rowcount") def test_delete(self): subtable, base = self.tables.subtable, self.tables.base class Base(fixtures.BasicEntity): 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.add(b1) sess.add(s1) sess.add(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() s1.subdata = 'some new subdata' if testing.db.dialect.supports_sane_rowcount: assert_raises( orm_exc.StaleDataError, sess.flush ) else: sess.flush() class DistinctPKTest(fixtures.MappedTest): """test the construction of mapper.primary_key when an inheriting relationship joins on a column other than primary key column.""" run_inserts = 'once' run_deletes = None @classmethod def define_tables(cls, metadata): global person_table, employee_table, Person, Employee person_table = Table("persons", metadata, Column("id", Integer, primary_key=True, test_needs_autoincrement=True), Column("name", String(80)), ) employee_table = Table("employees", metadata, Column("eid", Integer, primary_key=True, test_needs_autoincrement=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 @classmethod def insert_data(cls): 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.eid}) self._do_test(False) def test_explicit_composite_pk(self): person_mapper = mapper(Person, person_table) mapper(Employee, employee_table, inherits=person_mapper, properties=dict(id=[employee_table.c.eid, person_table.c.id]), primary_key=[person_table.c.id, employee_table.c.eid]) assert_raises_message(sa_exc.SAWarning, r"On mapper Mapper\|Employee\|employees, " "primary key column 'persons.id' is being " "combined with distinct primary key column 'employees.eid' " "in attribute 'id'. Use explicit properties to give " "each column its own mapped attribute name.", self._do_test, True ) 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(fixtures.MappedTest): """test that syncrules compile properly on custom inherit conds""" @classmethod def define_tables(cls, metadata): global _a_table, _b_table, _c_table _a_table = Table('a', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=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 reversed(_a_table.metadata.sorted_tables): t.delete().execute().close() def _do_test(self, j1, j2): class A(object): def __init__(self, **kwargs): for key, value in list(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.add(a) b = B(data1='b1', data2='b2') session.add(b) c = C(data1='c1', data2='c2', data3='c3') session.add(c) session.flush() session.expunge_all() assert len(session.query(A).all()) == 3 assert len(session.query(B).all()) == 2 assert len(session.query(C).all()) == 1 class OverrideColKeyTest(fixtures.MappedTest): """test overriding of column attributes.""" @classmethod def define_tables(cls, metadata): global base, subtable, subtable_two base = Table('base', metadata, Column('base_id', Integer, primary_key=True, test_needs_autoincrement=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)) ) subtable_two = Table('subtable_two', metadata, Column('base_id', Integer, primary_key=True), Column('fk_base_id', Integer, ForeignKey('base.base_id')), 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. eq_( class_mapper(Sub).get_property('base_id').columns, [subtable.c.base_id, base.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] }) eq_( 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) eq_( class_mapper(Sub).get_property('id').columns, [base.c.base_id] ) eq_( 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 originally [ticket:1111]. # the pattern here is now disallowed by [ticket:1892] class Base(object): pass class Sub(Base): pass mapper(Base, base, properties={ 'id':base.c.base_id }) def go(): 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. It then generates # an exception in 0.7 due to the implicit conflict. assert_raises(sa_exc.InvalidRequestError, go) def test_pk_fk_different(self): class Base(object): pass class Sub(Base): pass mapper(Base, base) def go(): mapper(Sub, subtable_two, inherits=Base) assert_raises_message( sa_exc.SAWarning, "Implicitly combining column base.base_id with " "column subtable_two.base_id under attribute 'base_id'", go ) 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.expunge_all() 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.expunge_all() 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 OptimizedLoadTest(fixtures.MappedTest): """tests for the "optimized load" routine.""" @classmethod def define_tables(cls, metadata): Table('base', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('data', String(50)), Column('type', String(50)), Column('counter', Integer, server_default="1") ) Table('sub', metadata, Column('id', Integer, ForeignKey('base.id'), primary_key=True), Column('sub', String(50)), Column('subcounter', Integer, server_default="1"), Column('subcounter2', Integer, server_default="1") ) Table('subsub', metadata, Column('id', Integer, ForeignKey('sub.id'), primary_key=True), Column('subsubcounter2', Integer, server_default="1") ) Table('with_comp', metadata, Column('id', Integer, ForeignKey('base.id'), primary_key=True), Column('a', String(10)), Column('b', String(10)) ) def test_no_optimize_on_map_to_join(self): base, sub = self.tables.base, self.tables.sub class Base(fixtures.ComparableEntity): pass class JoinBase(fixtures.ComparableEntity): pass class SubJoinBase(JoinBase): pass mapper(Base, base) mapper(JoinBase, base.outerjoin(sub), properties=util.OrderedDict( [('id', [base.c.id, sub.c.id]), ('counter', [base.c.counter, sub.c.subcounter])]) ) mapper(SubJoinBase, inherits=JoinBase) sess = Session() sess.add(Base(data='data')) sess.commit() sjb = sess.query(SubJoinBase).one() sjb_id = sjb.id sess.expire(sjb) # this should not use the optimized load, # which assumes discrete tables def go(): eq_(sjb.data, 'data') self.assert_sql_execution( testing.db, go, CompiledSQL( "SELECT base.id AS base_id, sub.id AS sub_id, " "base.counter AS base_counter, sub.subcounter AS sub_subcounter, " "base.data AS base_data, base.type AS base_type, " "sub.sub AS sub_sub, sub.subcounter2 AS sub_subcounter2 " "FROM base LEFT OUTER JOIN sub ON base.id = sub.id " "WHERE base.id = :param_1", {'param_1': sjb_id} ), ) def test_optimized_passes(self): """"test that the 'optimized load' routine doesn't crash when a column in the join condition is not available.""" base, sub = self.tables.base, self.tables.sub class Base(fixtures.ComparableEntity): pass class Sub(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') # redefine Sub's "id" to favor the "id" col in the subtable. # "id" is also part of the primary join condition mapper(Sub, sub, inherits=Base, polymorphic_identity='sub', properties={'id':[sub.c.id, base.c.id]}) sess = sessionmaker()() s1 = Sub(data='s1data', sub='s1sub') sess.add(s1) sess.commit() sess.expunge_all() # load s1 via Base. s1.id won't populate since it's relative to # the "sub" table. The optimized load kicks in and tries to # generate on the primary join, but cannot since "id" is itself unloaded. # the optimized load needs to return "None" so regular full-row loading proceeds s1 = sess.query(Base).first() assert s1.sub == 's1sub' def test_column_expression(self): base, sub = self.tables.base, self.tables.sub class Base(fixtures.ComparableEntity): pass class Sub(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') mapper(Sub, sub, inherits=Base, polymorphic_identity='sub', properties={ 'concat': column_property(sub.c.sub + "|" + sub.c.sub) }) sess = sessionmaker()() s1 = Sub(data='s1data', sub='s1sub') sess.add(s1) sess.commit() sess.expunge_all() s1 = sess.query(Base).first() assert s1.concat == 's1sub|s1sub' def test_column_expression_joined(self): base, sub = self.tables.base, self.tables.sub class Base(fixtures.ComparableEntity): pass class Sub(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') mapper(Sub, sub, inherits=Base, polymorphic_identity='sub', properties={ 'concat': column_property(base.c.data + "|" + sub.c.sub) }) sess = sessionmaker()() s1 = Sub(data='s1data', sub='s1sub') s2 = Sub(data='s2data', sub='s2sub') s3 = Sub(data='s3data', sub='s3sub') sess.add_all([s1, s2, s3]) sess.commit() sess.expunge_all() # query a bunch of rows to ensure there's no cartesian # product against "base" occurring, it is in fact # detecting that "base" needs to be in the join # criterion eq_( sess.query(Base).order_by(Base.id).all(), [ Sub(data='s1data', sub='s1sub', concat='s1data|s1sub'), Sub(data='s2data', sub='s2sub', concat='s2data|s2sub'), Sub(data='s3data', sub='s3sub', concat='s3data|s3sub') ] ) def test_composite_column_joined(self): base, with_comp = self.tables.base, self.tables.with_comp class Base(fixtures.BasicEntity): pass class WithComp(Base): pass class Comp(object): def __init__(self, a, b): self.a = a self.b = b def __composite_values__(self): return self.a, self.b def __eq__(self, other): return (self.a == other.a) and (self.b == other.b) mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') mapper(WithComp, with_comp, inherits=Base, polymorphic_identity='wc', properties={ 'comp': composite(Comp, with_comp.c.a, with_comp.c.b) }) sess = sessionmaker()() s1 = WithComp(data='s1data', comp=Comp('ham', 'cheese')) s2 = WithComp(data='s2data', comp=Comp('bacon', 'eggs')) sess.add_all([s1, s2]) sess.commit() sess.expunge_all() s1test, s2test = sess.query(Base).order_by(Base.id).all() assert s1test.comp assert s2test.comp eq_(s1test.comp, Comp('ham', 'cheese')) eq_(s2test.comp, Comp('bacon', 'eggs')) def test_load_expired_on_pending(self): base, sub = self.tables.base, self.tables.sub class Base(fixtures.BasicEntity): pass class Sub(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') mapper(Sub, sub, inherits=Base, polymorphic_identity='sub') sess = Session() s1 = Sub(data='s1') sess.add(s1) self.assert_sql_execution( testing.db, sess.flush, CompiledSQL( "INSERT INTO base (data, type) VALUES (:data, :type)", [{'data':'s1','type':'sub'}] ), CompiledSQL( "INSERT INTO sub (id, sub) VALUES (:id, :sub)", lambda ctx:{'id':s1.id, 'sub':None} ), ) def go(): eq_( s1.subcounter2, 1 ) self.assert_sql_execution( testing.db, go, CompiledSQL( "SELECT base.counter AS base_counter, sub.subcounter AS sub_subcounter, " "sub.subcounter2 AS sub_subcounter2 FROM base JOIN sub " "ON base.id = sub.id WHERE base.id = :param_1", lambda ctx:{'param_1': s1.id} ), ) def test_dont_generate_on_none(self): base, sub = self.tables.base, self.tables.sub class Base(fixtures.BasicEntity): pass class Sub(Base): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') m = mapper(Sub, sub, inherits=Base, polymorphic_identity='sub') s1 = Sub() assert m._optimized_get_statement(attributes.instance_state(s1), ['subcounter2']) is None # loads s1.id as None eq_(s1.id, None) # this now will come up with a value of None for id - should reject assert m._optimized_get_statement(attributes.instance_state(s1), ['subcounter2']) is None s1.id = 1 attributes.instance_state(s1)._commit_all(s1.__dict__, None) assert m._optimized_get_statement(attributes.instance_state(s1), ['subcounter2']) is not None def test_load_expired_on_pending_twolevel(self): base, sub, subsub = (self.tables.base, self.tables.sub, self.tables.subsub) class Base(fixtures.BasicEntity): pass class Sub(Base): pass class SubSub(Sub): pass mapper(Base, base, polymorphic_on=base.c.type, polymorphic_identity='base') mapper(Sub, sub, inherits=Base, polymorphic_identity='sub') mapper(SubSub, subsub, inherits=Sub, polymorphic_identity='subsub') sess = Session() s1 = SubSub(data='s1', counter=1, subcounter=2) sess.add(s1) self.assert_sql_execution( testing.db, sess.flush, CompiledSQL( "INSERT INTO base (data, type, counter) VALUES " "(:data, :type, :counter)", [{'data':'s1','type':'subsub','counter':1}] ), CompiledSQL( "INSERT INTO sub (id, sub, subcounter) VALUES " "(:id, :sub, :subcounter)", lambda ctx:[{'subcounter': 2, 'sub': None, 'id': s1.id}] ), CompiledSQL( "INSERT INTO subsub (id) VALUES (:id)", lambda ctx:{'id':s1.id} ), ) def go(): eq_( s1.subcounter2, 1 ) self.assert_sql_execution( testing.db, go, Or( CompiledSQL( "SELECT subsub.subsubcounter2 AS subsub_subsubcounter2, " "sub.subcounter2 AS sub_subcounter2 FROM subsub, sub " "WHERE :param_1 = sub.id AND sub.id = subsub.id", lambda ctx: {'param_1': s1.id} ), CompiledSQL( "SELECT sub.subcounter2 AS sub_subcounter2, " "subsub.subsubcounter2 AS subsub_subsubcounter2 " "FROM sub, subsub " "WHERE :param_1 = sub.id AND sub.id = subsub.id", lambda ctx: {'param_1': s1.id} ), ) ) class TransientInheritingGCTest(fixtures.TestBase): __requires__ = ('cpython', 'no_coverage') def _fixture(self): Base = declarative_base() class A(Base): __tablename__ = 'a' id = Column(Integer, primary_key=True, test_needs_autoincrement=True) data = Column(String(10)) self.A = A return Base def setUp(self): self.Base = self._fixture() def tearDown(self): self.Base.metadata.drop_all(testing.db) #clear_mappers() self.Base = None def _do_test(self, go): B = go() self.Base.metadata.create_all(testing.db) sess = Session(testing.db) sess.add(B(data='some b')) sess.commit() b1 = sess.query(B).one() assert isinstance(b1, B) sess.close() del sess del b1 del B gc_collect() eq_( len(self.A.__subclasses__()), 0) def test_single(self): def go(): class B(self.A): pass return B self._do_test(go) @testing.fails_if(lambda: True, "not supported for joined inh right now.") def test_joined(self): def go(): class B(self.A): __tablename__ = 'b' id = Column(Integer, ForeignKey('a.id'), primary_key=True) return B self._do_test(go) class NoPKOnSubTableWarningTest(fixtures.TestBase): def _fixture(self): metadata = MetaData() parent = Table('parent', metadata, Column('id', Integer, primary_key=True) ) child = Table('child', metadata, Column('id', Integer, ForeignKey('parent.id')) ) return parent, child def tearDown(self): clear_mappers() def test_warning_on_sub(self): parent, child = self._fixture() class P(object): pass class C(P): pass mapper(P, parent) assert_raises_message( sa_exc.SAWarning, "Could not assemble any primary keys for locally mapped " "table 'child' - no rows will be persisted in this Table.", mapper, C, child, inherits=P ) def test_no_warning_with_explicit(self): parent, child = self._fixture() class P(object): pass class C(P): pass mapper(P, parent) mc = mapper(C, child, inherits=P, primary_key=[parent.c.id]) eq_(mc.primary_key, (parent.c.id,)) class InhCondTest(fixtures.TestBase): def test_inh_cond_nonexistent_table_unrelated(self): metadata = MetaData() base_table = Table("base", metadata, Column("id", Integer, primary_key=True) ) derived_table = Table("derived", metadata, Column("id", Integer, ForeignKey("base.id"), primary_key=True), Column("owner_id", Integer, ForeignKey("owner.owner_id")) ) class Base(object): pass class Derived(Base): pass mapper(Base, base_table) # succeeds, despite "owner" table not configured yet m2 = mapper(Derived, derived_table, inherits=Base) assert m2.inherit_condition.compare( base_table.c.id==derived_table.c.id ) def test_inh_cond_nonexistent_col_unrelated(self): m = MetaData() base_table = Table("base", m, Column("id", Integer, primary_key=True) ) derived_table = Table("derived", m, Column("id", Integer, ForeignKey('base.id'), primary_key=True), Column('order_id', Integer, ForeignKey('order.foo')) ) order_table = Table('order', m, Column('id', Integer, primary_key=True)) class Base(object): pass class Derived(Base): pass mapper(Base, base_table) # succeeds, despite "order.foo" doesn't exist m2 = mapper(Derived, derived_table, inherits=Base) assert m2.inherit_condition.compare( base_table.c.id==derived_table.c.id ) def test_inh_cond_no_fk(self): metadata = MetaData() base_table = Table("base", metadata, Column("id", Integer, primary_key=True) ) derived_table = Table("derived", metadata, Column("id", Integer, primary_key=True), ) class Base(object): pass class Derived(Base): pass mapper(Base, base_table) assert_raises_message( sa_exc.ArgumentError, "Can't find any foreign key relationships between " "'base' and 'derived'.", mapper, Derived, derived_table, inherits=Base ) def test_inh_cond_nonexistent_table_related(self): m1 = MetaData() m2 = MetaData() base_table = Table("base", m1, Column("id", Integer, primary_key=True) ) derived_table = Table("derived", m2, Column("id", Integer, ForeignKey('base.id'), primary_key=True), ) class Base(object): pass class Derived(Base): pass mapper(Base, base_table) # the ForeignKey def is correct but there are two # different metadatas. Would like the traditional # "noreferencedtable" error to raise so that the # user is directed towards the FK definition in question. assert_raises_message( sa_exc.NoReferencedTableError, "Foreign key associated with column 'derived.id' " "could not find table 'base' with which to generate " "a foreign key to target column 'id'", mapper, Derived, derived_table, inherits=Base ) def test_inh_cond_nonexistent_col_related(self): m = MetaData() base_table = Table("base", m, Column("id", Integer, primary_key=True) ) derived_table = Table("derived", m, Column("id", Integer, ForeignKey('base.q'), primary_key=True), ) class Base(object): pass class Derived(Base): pass mapper(Base, base_table) assert_raises_message( sa_exc.NoReferencedColumnError, "Could not initialize target column for ForeignKey " "'base.q' on table " "'derived': table 'base' has no column named 'q'", mapper, Derived, derived_table, inherits=Base ) class PKDiscriminatorTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): parents = Table('parents', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('name', String(60))) children = Table('children', metadata, Column('id', Integer, ForeignKey('parents.id'), primary_key=True), Column('type', Integer,primary_key=True), Column('name', String(60))) def test_pk_as_discriminator(self): parents, children = self.tables.parents, self.tables.children class Parent(object): def __init__(self, name=None): self.name = name class Child(object): def __init__(self, name=None): self.name = name class A(Child): pass mapper(Parent, parents, properties={ 'children': relationship(Child, backref='parent'), }) mapper(Child, children, polymorphic_on=children.c.type, polymorphic_identity=1) mapper(A, inherits=Child, polymorphic_identity=2) s = create_session() p = Parent('p1') a = A('a1') p.children.append(a) s.add(p) s.flush() assert a.id assert a.type == 2 p.name='p1new' a.name='a1new' s.flush() s.expire_all() assert a.name=='a1new' assert p.name=='p1new' class NoPolyIdentInMiddleTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): Table('base', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', String(50), nullable=False), ) @classmethod def setup_classes(cls): class A(cls.Comparable): pass class B(A): pass class C(B): pass class D(B): pass class E(A): pass @classmethod def setup_mappers(cls): A, C, B, E, D, base = (cls.classes.A, cls.classes.C, cls.classes.B, cls.classes.E, cls.classes.D, cls.tables.base) mapper(A, base, polymorphic_on=base.c.type) mapper(B, inherits=A, ) mapper(C, inherits=B, polymorphic_identity='c') mapper(D, inherits=B, polymorphic_identity='d') mapper(E, inherits=A, polymorphic_identity='e') def test_load_from_middle(self): C, B = self.classes.C, self.classes.B s = Session() s.add(C()) o = s.query(B).first() eq_(o.type, 'c') assert isinstance(o, C) def test_load_from_base(self): A, C = self.classes.A, self.classes.C s = Session() s.add(C()) o = s.query(A).first() eq_(o.type, 'c') assert isinstance(o, C) def test_discriminator(self): C, B, base = (self.classes.C, self.classes.B, self.tables.base) assert class_mapper(B).polymorphic_on is base.c.type assert class_mapper(C).polymorphic_on is base.c.type def test_load_multiple_from_middle(self): C, B, E, D, base = (self.classes.C, self.classes.B, self.classes.E, self.classes.D, self.tables.base) s = Session() s.add_all([C(), D(), E()]) eq_( s.query(B).order_by(base.c.type).all(), [C(), D()] ) class DeleteOrphanTest(fixtures.MappedTest): """Test the fairly obvious, that an error is raised when attempting to insert an orphan. Previous SQLA versions would check this constraint in memory which is the original rationale for this test. """ @classmethod def define_tables(cls, metadata): global single, parent single = Table('single', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=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, test_needs_autoincrement=True), Column('data', String(50)) ) def test_orphan_message(self): class Base(fixtures.BasicEntity): pass class SubClass(Base): pass class Parent(fixtures.BasicEntity): pass mapper(Base, single, polymorphic_on=single.c.type, polymorphic_identity='base') mapper(SubClass, inherits=Base, polymorphic_identity='sub') mapper(Parent, parent, properties={ 'related':relationship(Base, cascade="all, delete-orphan") }) sess = create_session() s1 = SubClass(data='s1') sess.add(s1) assert_raises(sa_exc.DBAPIError, sess.flush) class PolymorphicUnionTest(fixtures.TestBase, testing.AssertsCompiledSQL): __dialect__ = 'default' def _fixture(self): t1 = table('t1', column('c1', Integer), column('c2', Integer), column('c3', Integer)) t2 = table('t2', column('c1', Integer), column('c2', Integer), column('c3', Integer), column('c4', Integer)) t3 = table('t3', column('c1', Integer), column('c3', Integer), column('c5', Integer)) return t1, t2, t3 def test_type_col_present(self): t1, t2, t3 = self._fixture() self.assert_compile( polymorphic_union( util.OrderedDict([("a", t1), ("b", t2), ("c", t3)]), 'q1' ), "SELECT t1.c1, t1.c2, t1.c3, CAST(NULL AS INTEGER) AS c4, " "CAST(NULL AS INTEGER) AS c5, 'a' AS q1 FROM t1 UNION ALL " "SELECT t2.c1, t2.c2, t2.c3, t2.c4, CAST(NULL AS INTEGER) AS c5, " "'b' AS q1 FROM t2 UNION ALL SELECT t3.c1, " "CAST(NULL AS INTEGER) AS c2, t3.c3, CAST(NULL AS INTEGER) AS c4, " "t3.c5, 'c' AS q1 FROM t3" ) def test_type_col_non_present(self): t1, t2, t3 = self._fixture() self.assert_compile( polymorphic_union( util.OrderedDict([("a", t1), ("b", t2), ("c", t3)]), None ), "SELECT t1.c1, t1.c2, t1.c3, CAST(NULL AS INTEGER) AS c4, " "CAST(NULL AS INTEGER) AS c5 FROM t1 UNION ALL SELECT t2.c1, " "t2.c2, t2.c3, t2.c4, CAST(NULL AS INTEGER) AS c5 FROM t2 " "UNION ALL SELECT t3.c1, CAST(NULL AS INTEGER) AS c2, t3.c3, " "CAST(NULL AS INTEGER) AS c4, t3.c5 FROM t3" ) def test_no_cast_null(self): t1, t2, t3 = self._fixture() self.assert_compile( polymorphic_union( util.OrderedDict([("a", t1), ("b", t2), ("c", t3)]), 'q1', cast_nulls=False ), "SELECT t1.c1, t1.c2, t1.c3, NULL AS c4, NULL AS c5, 'a' AS q1 " "FROM t1 UNION ALL SELECT t2.c1, t2.c2, t2.c3, t2.c4, NULL AS c5, " "'b' AS q1 FROM t2 UNION ALL SELECT t3.c1, NULL AS c2, t3.c3, " "NULL AS c4, t3.c5, 'c' AS q1 FROM t3" ) class NameConflictTest(fixtures.MappedTest): @classmethod def define_tables(cls, metadata): content = Table('content', metadata, Column('id', Integer, primary_key=True, test_needs_autoincrement=True), Column('type', String(30)) ) foo = Table('foo', metadata, Column('id', Integer, ForeignKey('content.id'), primary_key=True), Column('content_type', String(30)) ) def test_name_conflict(self): class Content(object): pass class Foo(Content): pass mapper(Content, self.tables.content, polymorphic_on=self.tables.content.c.type) mapper(Foo, self.tables.foo, inherits=Content, polymorphic_identity='foo') sess = create_session() f = Foo() f.content_type = 'bar' sess.add(f) sess.flush() f_id = f.id sess.expunge_all() assert sess.query(Content).get(f_id).content_type == 'bar'