mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-28 03:26:01 -04:00
Mike Bayer
525cc6fe02
as a result of the bugfix for 🎫`3167`, where attribute and validation events are no longer called within the flush process. The mutable extension was relying upon this behavior in the case where a column level Python-side default were responsible for generating the new value on INSERT or UPDATE, or when a value were fetched from the RETURNING clause for "eager defaults" mode. The new value would not be subject to any event when populated and the mutable extension could not establish proper coercion or history listening. A new event :meth:`.InstanceEvents.refresh_flush` is added which the mutable extension now makes use of for this use case. fixes #3427 - Added new event :meth:`.InstanceEvents.refresh_flush`, invoked when an INSERT or UPDATE level default value fetched via RETURNING or Python-side default is invoked within the flush process. This is to provide a hook that is no longer present as a result of 🎫`3167`, where attribute and validation events are no longer called within the flush process. - Added a new semi-public method to :class:`.MutableBase` :meth:`.MutableBase._get_listen_keys`. Overriding this method is needed in the case where a :class:`.MutableBase` subclass needs events to propagate for attribute keys other than the key to which the mutable type is associated with, when intercepting the :meth:`.InstanceEvents.refresh` or :meth:`.InstanceEvents.refresh_flush` events. The current example of this is composites using :class:`.MutableComposite`.
733 lines
18 KiB
Python
733 lines
18 KiB
Python
from sqlalchemy import Integer, ForeignKey, String
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from sqlalchemy.types import PickleType, TypeDecorator, VARCHAR
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from sqlalchemy.orm import mapper, Session, composite
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from sqlalchemy.orm.mapper import Mapper
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from sqlalchemy.orm.instrumentation import ClassManager
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from sqlalchemy.testing.schema import Table, Column
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from sqlalchemy.testing import eq_, assert_raises_message
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from sqlalchemy.testing.util import picklers
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from sqlalchemy.testing import fixtures
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from sqlalchemy.ext.mutable import MutableComposite
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from sqlalchemy.ext.mutable import MutableDict
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class Foo(fixtures.BasicEntity):
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pass
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class SubFoo(Foo):
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pass
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class FooWithEq(object):
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def __init__(self, **kw):
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for k in kw:
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setattr(self, k, kw[k])
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def __hash__(self):
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return hash(self.id)
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def __eq__(self, other):
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return self.id == other.id
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class Point(MutableComposite):
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def __init__(self, x, y):
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self.x = x
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self.y = y
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def __setattr__(self, key, value):
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object.__setattr__(self, key, value)
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self.changed()
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def __composite_values__(self):
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return self.x, self.y
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def __getstate__(self):
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return self.x, self.y
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def __setstate__(self, state):
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self.x, self.y = state
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def __eq__(self, other):
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return isinstance(other, Point) and \
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other.x == self.x and \
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other.y == self.y
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class MyPoint(Point):
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@classmethod
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def coerce(cls, key, value):
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if isinstance(value, tuple):
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value = Point(*value)
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return value
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class _MutableDictTestFixture(object):
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@classmethod
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def _type_fixture(cls):
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return MutableDict
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def teardown(self):
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# clear out mapper events
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Mapper.dispatch._clear()
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ClassManager.dispatch._clear()
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super(_MutableDictTestFixture, self).teardown()
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class _MutableDictTestBase(_MutableDictTestFixture):
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run_define_tables = 'each'
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def setup_mappers(cls):
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foo = cls.tables.foo
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mapper(Foo, foo)
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def test_coerce_none(self):
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sess = Session()
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f1 = Foo(data=None)
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sess.add(f1)
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sess.commit()
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eq_(f1.data, None)
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def test_coerce_raise(self):
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assert_raises_message(
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ValueError,
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"Attribute 'data' does not accept objects of type",
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Foo, data=set([1, 2, 3])
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)
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def test_in_place_mutation(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.data['a'] = 'c'
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sess.commit()
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eq_(f1.data, {'a': 'c'})
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def test_clear(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.data.clear()
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sess.commit()
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eq_(f1.data, {})
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def test_update(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.data.update({'a': 'z'})
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sess.commit()
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eq_(f1.data, {'a': 'z'})
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def test_setdefault(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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eq_(f1.data.setdefault('c', 'd'), 'd')
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sess.commit()
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eq_(f1.data, {'a': 'b', 'c': 'd'})
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eq_(f1.data.setdefault('c', 'q'), 'd')
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sess.commit()
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eq_(f1.data, {'a': 'b', 'c': 'd'})
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def test_replace(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.flush()
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f1.data = {'b': 'c'}
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sess.commit()
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eq_(f1.data, {'b': 'c'})
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def test_replace_itself_still_ok(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.flush()
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f1.data = f1.data
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f1.data['b'] = 'c'
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sess.commit()
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eq_(f1.data, {'a': 'b', 'b': 'c'})
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def test_pickle_parent(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.data
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sess.close()
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for loads, dumps in picklers():
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sess = Session()
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f2 = loads(dumps(f1))
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sess.add(f2)
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f2.data['a'] = 'c'
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assert f2 in sess.dirty
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def test_unrelated_flush(self):
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sess = Session()
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f1 = Foo(data={"a": "b"}, unrelated_data="unrelated")
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sess.add(f1)
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sess.flush()
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f1.unrelated_data = "unrelated 2"
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sess.flush()
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f1.data["a"] = "c"
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sess.commit()
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eq_(f1.data["a"], "c")
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def _test_non_mutable(self):
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sess = Session()
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f1 = Foo(non_mutable_data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.non_mutable_data['a'] = 'c'
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sess.commit()
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eq_(f1.non_mutable_data, {'a': 'b'})
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class MutableColumnDefaultTest(_MutableDictTestFixture, fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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MutableDict = cls._type_fixture()
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mutable_pickle = MutableDict.as_mutable(PickleType)
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Table(
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'foo', metadata,
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Column(
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'id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('data', mutable_pickle, default={}),
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)
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def setup_mappers(cls):
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foo = cls.tables.foo
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mapper(Foo, foo)
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def test_evt_on_flush_refresh(self):
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# test for #3427
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sess = Session()
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f1 = Foo()
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sess.add(f1)
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sess.flush()
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assert isinstance(f1.data, self._type_fixture())
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assert f1 not in sess.dirty
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f1.data['foo'] = 'bar'
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assert f1 in sess.dirty
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class MutableWithScalarPickleTest(_MutableDictTestBase, fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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MutableDict = cls._type_fixture()
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mutable_pickle = MutableDict.as_mutable(PickleType)
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('skip', mutable_pickle),
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Column('data', mutable_pickle),
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Column('non_mutable_data', PickleType),
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Column('unrelated_data', String(50))
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)
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def test_non_mutable(self):
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self._test_non_mutable()
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class MutableWithScalarJSONTest(_MutableDictTestBase, fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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import json
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class JSONEncodedDict(TypeDecorator):
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impl = VARCHAR(50)
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def process_bind_param(self, value, dialect):
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if value is not None:
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value = json.dumps(value)
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return value
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def process_result_value(self, value, dialect):
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if value is not None:
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value = json.loads(value)
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return value
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MutableDict = cls._type_fixture()
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('data', MutableDict.as_mutable(JSONEncodedDict)),
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Column('non_mutable_data', JSONEncodedDict),
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Column('unrelated_data', String(50))
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)
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def test_non_mutable(self):
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self._test_non_mutable()
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class MutableAssocWithAttrInheritTest(_MutableDictTestBase,
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fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('data', PickleType),
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Column('non_mutable_data', PickleType),
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Column('unrelated_data', String(50))
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)
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Table('subfoo', metadata,
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Column('id', Integer, ForeignKey('foo.id'), primary_key=True),
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)
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def setup_mappers(cls):
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foo = cls.tables.foo
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subfoo = cls.tables.subfoo
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mapper(Foo, foo)
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mapper(SubFoo, subfoo, inherits=Foo)
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MutableDict.associate_with_attribute(Foo.data)
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def test_in_place_mutation(self):
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sess = Session()
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f1 = SubFoo(data={'a': 'b'})
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sess.add(f1)
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sess.commit()
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f1.data['a'] = 'c'
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sess.commit()
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eq_(f1.data, {'a': 'c'})
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def test_replace(self):
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sess = Session()
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f1 = SubFoo(data={'a': 'b'})
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sess.add(f1)
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sess.flush()
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f1.data = {'b': 'c'}
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sess.commit()
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eq_(f1.data, {'b': 'c'})
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class MutableAssociationScalarPickleTest(_MutableDictTestBase,
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fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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MutableDict = cls._type_fixture()
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MutableDict.associate_with(PickleType)
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('skip', PickleType),
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Column('data', PickleType),
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Column('unrelated_data', String(50))
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)
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class MutableAssociationScalarJSONTest(_MutableDictTestBase,
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fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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import json
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class JSONEncodedDict(TypeDecorator):
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impl = VARCHAR(50)
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def process_bind_param(self, value, dialect):
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if value is not None:
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value = json.dumps(value)
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return value
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def process_result_value(self, value, dialect):
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if value is not None:
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value = json.loads(value)
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return value
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MutableDict = cls._type_fixture()
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MutableDict.associate_with(JSONEncodedDict)
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('data', JSONEncodedDict),
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Column('unrelated_data', String(50))
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)
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class CustomMutableAssociationScalarJSONTest(_MutableDictTestBase,
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fixtures.MappedTest):
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CustomMutableDict = None
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@classmethod
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def _type_fixture(cls):
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if not(getattr(cls, 'CustomMutableDict')):
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MutableDict = super(
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CustomMutableAssociationScalarJSONTest, cls)._type_fixture()
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class CustomMutableDict(MutableDict):
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pass
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cls.CustomMutableDict = CustomMutableDict
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return cls.CustomMutableDict
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@classmethod
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def define_tables(cls, metadata):
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import json
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class JSONEncodedDict(TypeDecorator):
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impl = VARCHAR(50)
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def process_bind_param(self, value, dialect):
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if value is not None:
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value = json.dumps(value)
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return value
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def process_result_value(self, value, dialect):
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if value is not None:
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value = json.loads(value)
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return value
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CustomMutableDict = cls._type_fixture()
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CustomMutableDict.associate_with(JSONEncodedDict)
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('data', JSONEncodedDict),
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Column('unrelated_data', String(50))
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)
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def test_pickle_parent(self):
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# Picklers don't know how to pickle CustomMutableDict,
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# but we aren't testing that here
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pass
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def test_coerce(self):
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sess = Session()
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f1 = Foo(data={'a': 'b'})
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sess.add(f1)
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sess.flush()
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eq_(type(f1.data), self._type_fixture())
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class _CompositeTestBase(object):
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@classmethod
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def define_tables(cls, metadata):
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Table('foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('x', Integer),
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Column('y', Integer),
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Column('unrelated_data', String(50))
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)
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def setup(self):
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from sqlalchemy.ext import mutable
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mutable._setup_composite_listener()
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super(_CompositeTestBase, self).setup()
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def teardown(self):
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# clear out mapper events
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Mapper.dispatch._clear()
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ClassManager.dispatch._clear()
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super(_CompositeTestBase, self).teardown()
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@classmethod
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def _type_fixture(cls):
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return Point
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class MutableCompositeColumnDefaultTest(_CompositeTestBase,
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fixtures.MappedTest):
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@classmethod
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def define_tables(cls, metadata):
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Table(
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'foo', metadata,
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Column('id', Integer, primary_key=True,
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test_needs_autoincrement=True),
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Column('x', Integer, default=5),
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Column('y', Integer, default=9),
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Column('unrelated_data', String(50))
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)
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@classmethod
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def setup_mappers(cls):
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foo = cls.tables.foo
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cls.Point = cls._type_fixture()
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mapper(Foo, foo, properties={
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'data': composite(cls.Point, foo.c.x, foo.c.y)
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})
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def test_evt_on_flush_refresh(self):
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# this still worked prior to #3427 being fixed in any case
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sess = Session()
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f1 = Foo(data=self.Point(None, None))
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sess.add(f1)
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sess.flush()
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eq_(f1.data, self.Point(5, 9))
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assert f1 not in sess.dirty
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f1.data.x = 10
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assert f1 in sess.dirty
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class MutableCompositesUnpickleTest(_CompositeTestBase, fixtures.MappedTest):
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@classmethod
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def setup_mappers(cls):
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foo = cls.tables.foo
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cls.Point = cls._type_fixture()
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mapper(FooWithEq, foo, properties={
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'data': composite(cls.Point, foo.c.x, foo.c.y)
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})
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def test_unpickle_modified_eq(self):
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u1 = FooWithEq(data=self.Point(3, 5))
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for loads, dumps in picklers():
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loads(dumps(u1))
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|
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class MutableCompositesTest(_CompositeTestBase, fixtures.MappedTest):
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@classmethod
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def setup_mappers(cls):
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foo = cls.tables.foo
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Point = cls._type_fixture()
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mapper(Foo, foo, properties={
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'data': composite(Point, foo.c.x, foo.c.y)
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})
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def test_in_place_mutation(self):
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sess = Session()
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d = Point(3, 4)
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f1 = Foo(data=d)
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sess.add(f1)
|
|
sess.commit()
|
|
|
|
f1.data.y = 5
|
|
sess.commit()
|
|
|
|
eq_(f1.data, Point(3, 5))
|
|
|
|
def test_pickle_of_parent(self):
|
|
sess = Session()
|
|
d = Point(3, 4)
|
|
f1 = Foo(data=d)
|
|
sess.add(f1)
|
|
sess.commit()
|
|
|
|
f1.data
|
|
assert 'data' in f1.__dict__
|
|
sess.close()
|
|
|
|
for loads, dumps in picklers():
|
|
sess = Session()
|
|
f2 = loads(dumps(f1))
|
|
sess.add(f2)
|
|
f2.data.y = 12
|
|
assert f2 in sess.dirty
|
|
|
|
def test_set_none(self):
|
|
sess = Session()
|
|
f1 = Foo(data=None)
|
|
sess.add(f1)
|
|
sess.commit()
|
|
eq_(f1.data, Point(None, None))
|
|
|
|
f1.data.y = 5
|
|
sess.commit()
|
|
eq_(f1.data, Point(None, 5))
|
|
|
|
def test_set_illegal(self):
|
|
f1 = Foo()
|
|
assert_raises_message(
|
|
ValueError,
|
|
"Attribute 'data' does not accept objects",
|
|
setattr, f1, 'data', 'foo'
|
|
)
|
|
|
|
def test_unrelated_flush(self):
|
|
sess = Session()
|
|
f1 = Foo(data=Point(3, 4), unrelated_data="unrelated")
|
|
sess.add(f1)
|
|
sess.flush()
|
|
f1.unrelated_data = "unrelated 2"
|
|
sess.flush()
|
|
f1.data.x = 5
|
|
sess.commit()
|
|
|
|
eq_(f1.data.x, 5)
|
|
|
|
|
|
class MutableCompositeCallableTest(_CompositeTestBase, fixtures.MappedTest):
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
foo = cls.tables.foo
|
|
|
|
Point = cls._type_fixture()
|
|
|
|
# in this case, this is not actually a MutableComposite.
|
|
# so we don't expect it to track changes
|
|
mapper(Foo, foo, properties={
|
|
'data': composite(lambda x, y: Point(x, y), foo.c.x, foo.c.y)
|
|
})
|
|
|
|
def test_basic(self):
|
|
sess = Session()
|
|
f1 = Foo(data=Point(3, 4))
|
|
sess.add(f1)
|
|
sess.flush()
|
|
f1.data.x = 5
|
|
sess.commit()
|
|
|
|
# we didn't get the change.
|
|
eq_(f1.data.x, 3)
|
|
|
|
|
|
class MutableCompositeCustomCoerceTest(_CompositeTestBase,
|
|
fixtures.MappedTest):
|
|
|
|
@classmethod
|
|
def _type_fixture(cls):
|
|
|
|
return MyPoint
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
foo = cls.tables.foo
|
|
|
|
Point = cls._type_fixture()
|
|
|
|
mapper(Foo, foo, properties={
|
|
'data': composite(Point, foo.c.x, foo.c.y)
|
|
})
|
|
|
|
def test_custom_coerce(self):
|
|
f = Foo()
|
|
f.data = (3, 4)
|
|
eq_(f.data, Point(3, 4))
|
|
|
|
def test_round_trip_ok(self):
|
|
sess = Session()
|
|
f = Foo()
|
|
f.data = (3, 4)
|
|
|
|
sess.add(f)
|
|
sess.commit()
|
|
|
|
eq_(f.data, Point(3, 4))
|
|
|
|
|
|
class MutableInheritedCompositesTest(_CompositeTestBase, fixtures.MappedTest):
|
|
|
|
@classmethod
|
|
def define_tables(cls, metadata):
|
|
Table('foo', metadata,
|
|
Column('id', Integer, primary_key=True,
|
|
test_needs_autoincrement=True),
|
|
Column('x', Integer),
|
|
Column('y', Integer)
|
|
)
|
|
Table('subfoo', metadata,
|
|
Column('id', Integer, ForeignKey('foo.id'), primary_key=True),
|
|
)
|
|
|
|
@classmethod
|
|
def setup_mappers(cls):
|
|
foo = cls.tables.foo
|
|
subfoo = cls.tables.subfoo
|
|
|
|
Point = cls._type_fixture()
|
|
|
|
mapper(Foo, foo, properties={
|
|
'data': composite(Point, foo.c.x, foo.c.y)
|
|
})
|
|
mapper(SubFoo, subfoo, inherits=Foo)
|
|
|
|
def test_in_place_mutation_subclass(self):
|
|
sess = Session()
|
|
d = Point(3, 4)
|
|
f1 = SubFoo(data=d)
|
|
sess.add(f1)
|
|
sess.commit()
|
|
|
|
f1.data.y = 5
|
|
sess.commit()
|
|
|
|
eq_(f1.data, Point(3, 5))
|
|
|
|
def test_pickle_of_parent_subclass(self):
|
|
sess = Session()
|
|
d = Point(3, 4)
|
|
f1 = SubFoo(data=d)
|
|
sess.add(f1)
|
|
sess.commit()
|
|
|
|
f1.data
|
|
assert 'data' in f1.__dict__
|
|
sess.close()
|
|
|
|
for loads, dumps in picklers():
|
|
sess = Session()
|
|
f2 = loads(dumps(f1))
|
|
sess.add(f2)
|
|
f2.data.y = 12
|
|
assert f2 in sess.dirty
|