mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-26 02:22:13 -04:00
Mike Bayer
ae4629e6a0
to descriptors, like hybrids, synonyms, composites, user-defined descriptors, etc. The attribute adaptation which goes on has been made more robust, such that if a descriptor returns another instrumented attribute, rather than a compound SQL expression element, the operation will still proceed. Addtionally, the "adapted" operator will retain its class; previously, a change in class from ``InstrumentedAttribute`` to ``QueryableAttribute`` (a superclass) would interact with Python's operator system such that an expression like ``aliased(MyClass.x) > MyClass.x`` would reverse itself to read ``myclass.x < myclass_1.x``. The adapted attribute will also refer to the new :class:`.AliasedClass` as its parent which was not always the case before. [ticket:2872]
694 lines
22 KiB
Python
694 lines
22 KiB
Python
from sqlalchemy.testing import assert_raises, assert_raises_message
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from sqlalchemy.orm import util as orm_util
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from sqlalchemy import Column
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from sqlalchemy import util
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from sqlalchemy import Integer
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from sqlalchemy import MetaData
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from sqlalchemy import Table
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from sqlalchemy.orm import aliased, with_polymorphic, synonym
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from sqlalchemy.orm import mapper, create_session, Session
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from sqlalchemy.testing import fixtures
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from test.orm import _fixtures
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from sqlalchemy.testing import eq_, is_
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from sqlalchemy.orm.path_registry import PathRegistry, RootRegistry
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from sqlalchemy import inspect
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from sqlalchemy.ext.hybrid import hybrid_property, hybrid_method
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from sqlalchemy.testing import AssertsCompiledSQL
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class AliasedClassTest(fixtures.TestBase, AssertsCompiledSQL):
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__dialect__ = 'default'
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def _fixture(self, cls, properties={}):
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table = Table('point', MetaData(),
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Column('id', Integer(), primary_key=True),
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Column('x', Integer),
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Column('y', Integer))
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mapper(cls, table, properties=properties)
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return table
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def test_simple(self):
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class Point(object):
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pass
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table = self._fixture(Point)
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alias = aliased(Point)
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assert alias.id
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assert alias.x
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assert alias.y
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assert Point.id.__clause_element__().table is table
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assert alias.id.__clause_element__().table is not table
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def test_not_instantiatable(self):
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class Point(object):
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pass
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table = self._fixture(Point)
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alias = aliased(Point)
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assert_raises(TypeError, alias)
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def test_instancemethod(self):
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class Point(object):
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def zero(self):
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self.x, self.y = 0, 0
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table = self._fixture(Point)
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alias = aliased(Point)
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assert Point.zero
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# TODO: I don't quite understand this
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# still
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if util.py2k:
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assert not getattr(alias, 'zero')
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else:
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assert getattr(alias, 'zero')
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def test_classmethod(self):
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class Point(object):
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@classmethod
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def max_x(cls):
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return 100
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table = self._fixture(Point)
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alias = aliased(Point)
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assert Point.max_x
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assert alias.max_x
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assert Point.max_x() == alias.max_x() == 100
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def test_simple_property(self):
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class Point(object):
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@property
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def max_x(self):
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return 100
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table = self._fixture(Point)
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alias = aliased(Point)
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assert Point.max_x
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assert Point.max_x != 100
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assert alias.max_x
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assert Point.max_x is alias.max_x
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def test_descriptors(self):
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class descriptor(object):
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def __init__(self, fn):
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self.fn = fn
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def __get__(self, obj, owner):
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if obj is not None:
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return self.fn(obj, obj)
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else:
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return self
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def method(self):
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return 'method'
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class Point(object):
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center = (0, 0)
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@descriptor
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def thing(self, arg):
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return arg.center
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table = self._fixture(Point)
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alias = aliased(Point)
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assert Point.thing != (0, 0)
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assert Point().thing == (0, 0)
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assert Point.thing.method() == 'method'
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assert alias.thing != (0, 0)
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assert alias.thing.method() == 'method'
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def _assert_has_table(self, expr, table):
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from sqlalchemy import Column # override testlib's override
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for child in expr.get_children():
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if isinstance(child, Column):
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assert child.table is table
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def test_hybrid_descriptor_one(self):
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class Point(object):
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def __init__(self, x, y):
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self.x, self.y = x, y
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@hybrid_method
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def left_of(self, other):
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return self.x < other.x
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self._fixture(Point)
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alias = aliased(Point)
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sess = Session()
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self.assert_compile(
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sess.query(alias).filter(alias.left_of(Point)),
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"SELECT point_1.id AS point_1_id, point_1.x AS point_1_x, "
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"point_1.y AS point_1_y FROM point AS point_1, point "
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"WHERE point_1.x < point.x"
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)
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def test_hybrid_descriptor_two(self):
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class Point(object):
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def __init__(self, x, y):
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self.x, self.y = x, y
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@hybrid_property
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def double_x(self):
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return self.x * 2
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self._fixture(Point)
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alias = aliased(Point)
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eq_(str(Point.double_x), "point.x * :x_1")
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eq_(str(alias.double_x), "point_1.x * :x_1")
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sess = Session()
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self.assert_compile(
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sess.query(alias).filter(alias.double_x > Point.x),
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"SELECT point_1.id AS point_1_id, point_1.x AS point_1_x, "
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"point_1.y AS point_1_y FROM point AS point_1, point "
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"WHERE point_1.x * :x_1 > point.x"
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)
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def test_hybrid_descriptor_three(self):
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class Point(object):
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def __init__(self, x, y):
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self.x, self.y = x, y
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@hybrid_property
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def x_alone(self):
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return self.x
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self._fixture(Point)
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alias = aliased(Point)
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eq_(str(Point.x_alone), "Point.x")
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eq_(str(alias.x_alone), "AliasedClass_Point.x")
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assert Point.x_alone is Point.x
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eq_(str(alias.x_alone == alias.x), "point_1.x = point_1.x")
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a2 = aliased(Point)
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eq_(str(a2.x_alone == alias.x), "point_1.x = point_2.x")
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sess = Session()
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self.assert_compile(
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sess.query(alias).filter(alias.x_alone > Point.x),
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"SELECT point_1.id AS point_1_id, point_1.x AS point_1_x, "
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"point_1.y AS point_1_y FROM point AS point_1, point "
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"WHERE point_1.x > point.x"
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)
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def test_proxy_descriptor_one(self):
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class Point(object):
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def __init__(self, x, y):
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self.x, self.y = x, y
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self._fixture(Point, properties={
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'x_syn': synonym("x")
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})
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alias = aliased(Point)
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eq_(str(Point.x_syn), "Point.x_syn")
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eq_(str(alias.x_syn), "AliasedClass_Point.x_syn")
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sess = Session()
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self.assert_compile(
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sess.query(alias.x_syn).filter(alias.x_syn > Point.x_syn),
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"SELECT point_1.x AS point_1_x FROM point AS point_1, point "
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"WHERE point_1.x > point.x"
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)
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class IdentityKeyTest(_fixtures.FixtureTest):
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run_inserts = None
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def test_identity_key_1(self):
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User, users = self.classes.User, self.tables.users
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mapper(User, users)
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key = orm_util.identity_key(User, [1])
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eq_(key, (User, (1,)))
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key = orm_util.identity_key(User, ident=[1])
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eq_(key, (User, (1,)))
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def test_identity_key_scalar(self):
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User, users = self.classes.User, self.tables.users
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mapper(User, users)
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key = orm_util.identity_key(User, 1)
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eq_(key, (User, (1,)))
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key = orm_util.identity_key(User, ident=1)
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eq_(key, (User, (1,)))
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def test_identity_key_2(self):
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users, User = self.tables.users, self.classes.User
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mapper(User, users)
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s = create_session()
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u = User(name='u1')
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s.add(u)
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s.flush()
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key = orm_util.identity_key(instance=u)
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eq_(key, (User, (u.id,)))
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def test_identity_key_3(self):
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User, users = self.classes.User, self.tables.users
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mapper(User, users)
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row = {users.c.id: 1, users.c.name: "Frank"}
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key = orm_util.identity_key(User, row=row)
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eq_(key, (User, (1,)))
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class PathRegistryTest(_fixtures.FixtureTest):
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run_setup_mappers = 'once'
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run_inserts = None
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run_deletes = None
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@classmethod
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def setup_mappers(cls):
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cls._setup_stock_mapping()
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def test_root_registry(self):
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umapper = inspect(self.classes.User)
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is_(
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RootRegistry()[umapper],
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umapper._path_registry
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)
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eq_(
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RootRegistry()[umapper],
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PathRegistry.coerce((umapper,))
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)
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def test_expand(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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path = PathRegistry.coerce((umapper,))
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eq_(
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path[umapper.attrs.addresses][amapper]
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[amapper.attrs.email_address],
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PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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)
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def test_entity_boolean(self):
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umapper = inspect(self.classes.User)
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path = PathRegistry.coerce((umapper,))
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is_(bool(path), True)
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def test_key_boolean(self):
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umapper = inspect(self.classes.User)
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path = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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is_(bool(path), True)
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def test_aliased_class(self):
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User = self.classes.User
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ua = aliased(User)
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ua_insp = inspect(ua)
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path = PathRegistry.coerce((ua_insp, ua_insp.mapper.attrs.addresses))
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assert path.parent.is_aliased_class
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def test_indexed_entity(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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path = PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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is_(path[0], umapper)
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is_(path[2], amapper)
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def test_indexed_key(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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path = PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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eq_(path[1], umapper.attrs.addresses)
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eq_(path[3], amapper.attrs.email_address)
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def test_slice(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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path = PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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eq_(path[1:3], (umapper.attrs.addresses, amapper))
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def test_addition(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
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eq_(
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p1 + p2,
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PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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)
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def test_length(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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pneg1 = PathRegistry.coerce(())
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p0 = PathRegistry.coerce((umapper,))
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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eq_(len(pneg1), 0)
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eq_(len(p0), 1)
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eq_(len(p1), 2)
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eq_(len(p2), 3)
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eq_(len(p3), 4)
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eq_(pneg1.length, 0)
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eq_(p0.length, 1)
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eq_(p1.length, 2)
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eq_(p2.length, 3)
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eq_(p3.length, 4)
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def test_eq(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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u_alias = inspect(aliased(self.classes.User))
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p3 = PathRegistry.coerce((umapper, umapper.attrs.name))
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p4 = PathRegistry.coerce((u_alias, umapper.attrs.addresses))
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p5 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p6 = PathRegistry.coerce((amapper, amapper.attrs.user, umapper,
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umapper.attrs.addresses))
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p7 = PathRegistry.coerce((amapper, amapper.attrs.user, umapper,
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umapper.attrs.addresses,
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amapper, amapper.attrs.email_address))
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is_(p1 == p2, True)
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is_(p1 == p3, False)
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is_(p1 == p4, False)
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is_(p1 == p5, False)
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is_(p6 == p7, False)
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is_(p6 == p7.parent.parent, True)
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is_(p1 != p2, False)
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is_(p1 != p3, True)
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is_(p1 != p4, True)
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is_(p1 != p5, True)
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def test_contains_mapper(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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assert p1.contains_mapper(umapper)
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assert not p1.contains_mapper(amapper)
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def test_path(self):
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
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eq_(
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p1.path, (umapper, umapper.attrs.addresses)
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)
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eq_(
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p2.path, (umapper, umapper.attrs.addresses, amapper)
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)
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eq_(
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p3.path, (amapper, amapper.attrs.email_address)
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)
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def test_registry_set(self):
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reg = {}
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
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p1.set(reg, "p1key", "p1value")
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p2.set(reg, "p2key", "p2value")
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p3.set(reg, "p3key", "p3value")
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eq_(
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reg,
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{
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('p1key', p1.path): 'p1value',
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('p2key', p2.path): 'p2value',
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('p3key', p3.path): 'p3value',
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}
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)
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def test_registry_get(self):
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reg = {}
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
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reg.update(
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{
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('p1key', p1.path): 'p1value',
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('p2key', p2.path): 'p2value',
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('p3key', p3.path): 'p3value',
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}
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)
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eq_(p1.get(reg, "p1key"), "p1value")
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eq_(p2.get(reg, "p2key"), "p2value")
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eq_(p2.get(reg, "p1key"), None)
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eq_(p3.get(reg, "p3key"), "p3value")
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eq_(p3.get(reg, "p1key"), None)
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def test_registry_contains(self):
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reg = {}
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
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p3 = PathRegistry.coerce((amapper, amapper.attrs.email_address))
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reg.update(
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{
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('p1key', p1.path): 'p1value',
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('p2key', p2.path): 'p2value',
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('p3key', p3.path): 'p3value',
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}
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)
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assert p1.contains(reg, "p1key")
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assert not p1.contains(reg, "p2key")
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assert p3.contains(reg, "p3key")
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assert not p2.contains(reg, "fake")
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def test_registry_setdefault(self):
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reg = {}
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umapper = inspect(self.classes.User)
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amapper = inspect(self.classes.Address)
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p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
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p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
|
|
reg.update(
|
|
{
|
|
('p1key', p1.path): 'p1value',
|
|
}
|
|
)
|
|
|
|
p1.setdefault(reg, "p1key", "p1newvalue_a")
|
|
p1.setdefault(reg, "p1key_new", "p1newvalue_b")
|
|
p2.setdefault(reg, "p2key", "p2newvalue")
|
|
eq_(
|
|
reg,
|
|
{
|
|
('p1key', p1.path): 'p1value',
|
|
('p1key_new', p1.path): 'p1newvalue_b',
|
|
('p2key', p2.path): 'p2newvalue',
|
|
}
|
|
)
|
|
|
|
def test_serialize(self):
|
|
User = self.classes.User
|
|
Address = self.classes.Address
|
|
umapper = inspect(self.classes.User)
|
|
amapper = inspect(self.classes.Address)
|
|
|
|
p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper,
|
|
amapper.attrs.email_address))
|
|
p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
|
|
p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
|
|
eq_(
|
|
p1.serialize(),
|
|
[(User, "addresses"), (Address, "email_address")]
|
|
)
|
|
eq_(
|
|
p2.serialize(),
|
|
[(User, "addresses"), (Address, None)]
|
|
)
|
|
eq_(
|
|
p3.serialize(),
|
|
[(User, "addresses")]
|
|
)
|
|
|
|
def test_deseralize(self):
|
|
User = self.classes.User
|
|
Address = self.classes.Address
|
|
umapper = inspect(self.classes.User)
|
|
amapper = inspect(self.classes.Address)
|
|
|
|
|
|
p1 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper,
|
|
amapper.attrs.email_address))
|
|
p2 = PathRegistry.coerce((umapper, umapper.attrs.addresses, amapper))
|
|
p3 = PathRegistry.coerce((umapper, umapper.attrs.addresses))
|
|
|
|
eq_(
|
|
PathRegistry.deserialize([(User, "addresses"),
|
|
(Address, "email_address")]),
|
|
p1
|
|
)
|
|
eq_(
|
|
PathRegistry.deserialize([(User, "addresses"), (Address, None)]),
|
|
p2
|
|
)
|
|
eq_(
|
|
PathRegistry.deserialize([(User, "addresses")]),
|
|
p3
|
|
)
|
|
|
|
from .inheritance import _poly_fixtures
|
|
class PathRegistryInhTest(_poly_fixtures._Polymorphic):
|
|
run_setup_mappers = 'once'
|
|
run_inserts = None
|
|
run_deletes = None
|
|
|
|
def test_plain(self):
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
pmapper = inspect(Person)
|
|
emapper = inspect(Engineer)
|
|
|
|
p1 = PathRegistry.coerce((pmapper, emapper.attrs.machines))
|
|
|
|
# given a mapper and an attribute on a subclass,
|
|
# the path converts what you get to be against that subclass
|
|
eq_(
|
|
p1.path,
|
|
(emapper, emapper.attrs.machines)
|
|
)
|
|
|
|
def test_plain_compound(self):
|
|
Company = _poly_fixtures.Company
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
cmapper = inspect(Company)
|
|
pmapper = inspect(Person)
|
|
emapper = inspect(Engineer)
|
|
|
|
p1 = PathRegistry.coerce((cmapper, cmapper.attrs.employees,
|
|
pmapper, emapper.attrs.machines))
|
|
|
|
# given a mapper and an attribute on a subclass,
|
|
# the path converts what you get to be against that subclass
|
|
eq_(
|
|
p1.path,
|
|
(cmapper, cmapper.attrs.employees, emapper, emapper.attrs.machines)
|
|
)
|
|
|
|
def test_plain_aliased(self):
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
emapper = inspect(Engineer)
|
|
|
|
p_alias = aliased(Person)
|
|
p_alias = inspect(p_alias)
|
|
|
|
p1 = PathRegistry.coerce((p_alias, emapper.attrs.machines))
|
|
# plain AliasedClass - the path keeps that AliasedClass directly
|
|
# as is in the path
|
|
eq_(
|
|
p1.path,
|
|
(p_alias, emapper.attrs.machines)
|
|
)
|
|
|
|
def test_plain_aliased_compound(self):
|
|
Company = _poly_fixtures.Company
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
cmapper = inspect(Company)
|
|
emapper = inspect(Engineer)
|
|
|
|
c_alias = aliased(Company)
|
|
p_alias = aliased(Person)
|
|
|
|
c_alias = inspect(c_alias)
|
|
p_alias = inspect(p_alias)
|
|
|
|
p1 = PathRegistry.coerce((c_alias, cmapper.attrs.employees,
|
|
p_alias, emapper.attrs.machines))
|
|
# plain AliasedClass - the path keeps that AliasedClass directly
|
|
# as is in the path
|
|
eq_(
|
|
p1.path,
|
|
(c_alias, cmapper.attrs.employees, p_alias, emapper.attrs.machines)
|
|
)
|
|
|
|
def test_with_poly_sub(self):
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
emapper = inspect(Engineer)
|
|
|
|
p_poly = with_polymorphic(Person, [Engineer])
|
|
e_poly = inspect(p_poly.Engineer)
|
|
p_poly = inspect(p_poly)
|
|
|
|
p1 = PathRegistry.coerce((p_poly, emapper.attrs.machines))
|
|
|
|
# polymorphic AliasedClass - the path uses _entity_for_mapper()
|
|
# to get the most specific sub-entity
|
|
eq_(
|
|
p1.path,
|
|
(e_poly, emapper.attrs.machines)
|
|
)
|
|
|
|
def test_with_poly_base(self):
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
pmapper = inspect(Person)
|
|
emapper = inspect(Engineer)
|
|
|
|
p_poly = with_polymorphic(Person, [Engineer])
|
|
p_poly = inspect(p_poly)
|
|
|
|
# "name" is actually on Person, not Engineer
|
|
p1 = PathRegistry.coerce((p_poly, emapper.attrs.name))
|
|
|
|
# polymorphic AliasedClass - because "name" is on Person,
|
|
# we get Person, not Engineer
|
|
eq_(
|
|
p1.path,
|
|
(p_poly, pmapper.attrs.name)
|
|
)
|
|
|
|
def test_with_poly_use_mapper(self):
|
|
Person = _poly_fixtures.Person
|
|
Engineer = _poly_fixtures.Engineer
|
|
emapper = inspect(Engineer)
|
|
|
|
p_poly = with_polymorphic(Person, [Engineer], _use_mapper_path=True)
|
|
p_poly = inspect(p_poly)
|
|
|
|
p1 = PathRegistry.coerce((p_poly, emapper.attrs.machines))
|
|
|
|
# polymorphic AliasedClass with the "use_mapper_path" flag -
|
|
# the AliasedClass acts just like the base mapper
|
|
eq_(
|
|
p1.path,
|
|
(emapper, emapper.attrs.machines)
|
|
)
|
|
|