本文整理汇总了Python中sqlalchemy.orm.attributes.register_attribute函数的典型用法代码示例。如果您正苦于以下问题：Python register_attribute函数的具体用法？Python register_attribute怎么用？Python register_attribute使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了register_attribute函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Python代码示例。
示例1: test_lazy_backref_collections
def test_lazy_backref_collections(self):
class Foo(_base.BasicEntity):
pass
class Bar(_base.BasicEntity):
pass
lazy_load = []
def lazyload(instance):
def load():
return lazy_load
return load
attributes.register_class(Foo)
attributes.register_class(Bar)
attributes.register_attribute(Foo, 'bars', uselist=True, extension=attributes.GenericBackrefExtension('foo'), trackparent=True, callable_=lazyload, useobject=True)
attributes.register_attribute(Bar, 'foo', uselist=False, extension=attributes.GenericBackrefExtension('bars'), trackparent=True, useobject=True)
bar1, bar2, bar3, bar4 = [Bar(id=1), Bar(id=2), Bar(id=3), Bar(id=4)]
lazy_load = [bar1, bar2, bar3]
f = Foo()
bar4 = Bar()
bar4.foo = f
eq_(attributes.get_history(attributes.instance_state(f), 'bars'), ([bar4], [bar1, bar2, bar3], []))
lazy_load = None
f = Foo()
bar4 = Bar()
bar4.foo = f
eq_(attributes.get_history(attributes.instance_state(f), 'bars'), ([bar4], [], []))
lazy_load = [bar1, bar2, bar3]
attributes.instance_state(f).expire_attributes(['bars'])
eq_(attributes.get_history(attributes.instance_state(f), 'bars'), ((), [bar1, bar2, bar3], ()))
开发者ID:jrus，项目名称:sqlalchemy，代码行数:34，代码来源:attributes.py
示例2: test_dict_collections
def test_dict_collections(self):
class Foo(fixtures.Base):
pass
class Bar(fixtures.Base):
pass
from sqlalchemy.orm.collections import attribute_mapped_collection
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True, typecallable=attribute_mapped_collection('name'))
hi = Bar(name='hi')
there = Bar(name='there')
old = Bar(name='old')
new = Bar(name='new')
f = Foo()
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [], []))
f.someattr['hi'] = hi
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([hi], [], []))
f.someattr['there'] = there
self.assertEquals(tuple([set(x) for x in attributes.get_history(f._state, 'someattr')]), (set([hi, there]), set([]), set([])))
f._state.commit(['someattr'])
self.assertEquals(tuple([set(x) for x in attributes.get_history(f._state, 'someattr')]), (set([]), set([hi, there]), set([])))
开发者ID:Frihet，项目名称:sqlalchemy-patches，代码行数:27，代码来源:attributes.py
示例3: test_collections_via_backref
def test_collections_via_backref(self):
class Foo(_base.BasicEntity):
pass
class Bar(_base.BasicEntity):
pass
attributes.register_class(Foo)
attributes.register_class(Bar)
attributes.register_attribute(Foo, 'bars', uselist=True, extension=attributes.GenericBackrefExtension('foo'), trackparent=True, useobject=True)
attributes.register_attribute(Bar, 'foo', uselist=False, extension=attributes.GenericBackrefExtension('bars'), trackparent=True, useobject=True)
f1 = Foo()
b1 = Bar()
eq_(attributes.get_history(attributes.instance_state(f1), 'bars'), ((), [], ()))
eq_(attributes.get_history(attributes.instance_state(b1), 'foo'), ((), [None], ()))
#b1.foo = f1
f1.bars.append(b1)
eq_(attributes.get_history(attributes.instance_state(f1), 'bars'), ([b1], [], []))
eq_(attributes.get_history(attributes.instance_state(b1), 'foo'), ([f1], (), ()))
b2 = Bar()
f1.bars.append(b2)
eq_(attributes.get_history(attributes.instance_state(f1), 'bars'), ([b1, b2], [], []))
eq_(attributes.get_history(attributes.instance_state(b1), 'foo'), ([f1], (), ()))
eq_(attributes.get_history(attributes.instance_state(b2), 'foo'), ([f1], (), ()))
开发者ID:jrus，项目名称:sqlalchemy，代码行数:26，代码来源:attributes.py
示例4: test_collections_via_backref
def test_collections_via_backref(self):
class Foo(fixtures.Base):
pass
class Bar(fixtures.Base):
pass
attributes.register_class(Foo)
attributes.register_class(Bar)
attributes.register_attribute(Foo, 'bars', uselist=True, extension=attributes.GenericBackrefExtension('foo'), trackparent=True, useobject=True)
attributes.register_attribute(Bar, 'foo', uselist=False, extension=attributes.GenericBackrefExtension('bars'), trackparent=True, useobject=True)
f1 = Foo()
b1 = Bar()
self.assertEquals(attributes.get_history(f1._state, 'bars'), ([], [], []))
self.assertEquals(attributes.get_history(b1._state, 'foo'), ([], [None], []))
#b1.foo = f1
f1.bars.append(b1)
self.assertEquals(attributes.get_history(f1._state, 'bars'), ([b1], [], []))
self.assertEquals(attributes.get_history(b1._state, 'foo'), ([f1], [], []))
b2 = Bar()
f1.bars.append(b2)
self.assertEquals(attributes.get_history(f1._state, 'bars'), ([b1, b2], [], []))
self.assertEquals(attributes.get_history(b1._state, 'foo'), ([f1], [], []))
self.assertEquals(attributes.get_history(b2._state, 'foo'), ([f1], [], []))
开发者ID:Frihet，项目名称:sqlalchemy-patches，代码行数:26，代码来源:attributes.py
示例5: setUp
def setUp(self):
global Post, Blog, called, lazy_load
class Post(object):
def __init__(self, name):
self.name = name
__hash__ = None
def __eq__(self, other):
return other.name == self.name
class Blog(object):
def __init__(self, name):
self.name = name
__hash__ = None
def __eq__(self, other):
return other.name == self.name
called = [0]
lazy_load = []
def lazy_posts(instance):
def load():
called[0] += 1
return lazy_load
return load
attributes.register_class(Post)
attributes.register_class(Blog)
attributes.register_attribute(Post, 'blog', uselist=False, extension=attributes.GenericBackrefExtension('posts'), trackparent=True, useobject=True)
attributes.register_attribute(Blog, 'posts', uselist=True, extension=attributes.GenericBackrefExtension('blog'), callable_=lazy_posts, trackparent=True, useobject=True)
开发者ID:jrus，项目名称:sqlalchemy，代码行数:30，代码来源:attributes.py
示例6: test_parenttrack
def test_parenttrack(self):
class Foo(object):pass
class Bar(object):pass
attributes.register_class(Foo)
attributes.register_class(Bar)
attributes.register_attribute(Foo, 'element', uselist=False, trackparent=True, useobject=True)
attributes.register_attribute(Bar, 'element', uselist=False, trackparent=True, useobject=True)
f1 = Foo()
f2 = Foo()
b1 = Bar()
b2 = Bar()
f1.element = b1
b2.element = f2
assert attributes.has_parent(Foo, b1, 'element')
assert not attributes.has_parent(Foo, b2, 'element')
assert not attributes.has_parent(Foo, f2, 'element')
assert attributes.has_parent(Bar, f2, 'element')
b2.element = None
assert not attributes.has_parent(Bar, f2, 'element')
# test that double assignment doesn't accidentally reset the 'parent' flag.
b3 = Bar()
f4 = Foo()
b3.element = f4
assert attributes.has_parent(Bar, f4, 'element')
b3.element = f4
assert attributes.has_parent(Bar, f4, 'element')
开发者ID:jrus，项目名称:sqlalchemy，代码行数:33，代码来源:attributes.py
示例7: test_dict_collections
def test_dict_collections(self):
class Foo(_base.BasicEntity):
pass
class Bar(_base.BasicEntity):
pass
from sqlalchemy.orm.collections import attribute_mapped_collection
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True, typecallable=attribute_mapped_collection('name'))
hi = Bar(name='hi')
there = Bar(name='there')
old = Bar(name='old')
new = Bar(name='new')
f = Foo()
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [], ()))
f.someattr['hi'] = hi
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
f.someattr['there'] = there
eq_(tuple([set(x) for x in attributes.get_history(attributes.instance_state(f), 'someattr')]), (set([hi, there]), set(), set()))
attributes.instance_state(f).commit(['someattr'])
eq_(tuple([set(x) for x in attributes.get_history(attributes.instance_state(f), 'someattr')]), (set(), set([hi, there]), set()))
开发者ID:jrus，项目名称:sqlalchemy，代码行数:27，代码来源:attributes.py
示例8: test_collection_with_backref
def test_collection_with_backref(self):
for base in (object, MyBaseClass, MyClass):
class Post(base):pass
class Blog(base):pass
attributes.register_class(Post)
attributes.register_class(Blog)
attributes.register_attribute(Post, 'blog', uselist=False, extension=attributes.GenericBackrefExtension('posts'), trackparent=True, useobject=True)
attributes.register_attribute(Blog, 'posts', uselist=True, extension=attributes.GenericBackrefExtension('blog'), trackparent=True, useobject=True)
b = Blog()
(p1, p2, p3) = (Post(), Post(), Post())
b.posts.append(p1)
b.posts.append(p2)
b.posts.append(p3)
self.assert_(b.posts == [p1, p2, p3])
self.assert_(p2.blog is b)
p3.blog = None
self.assert_(b.posts == [p1, p2])
p4 = Post()
p4.blog = b
self.assert_(b.posts == [p1, p2, p4])
p4.blog = b
p4.blog = b
self.assert_(b.posts == [p1, p2, p4])
# assert no failure removing None
p5 = Post()
p5.blog = None
del p5.blog
开发者ID:chatch，项目名称:pinyin-toolkit，代码行数:31，代码来源:test_extendedattr.py
示例9: test_lazytrackparent
def test_lazytrackparent(self):
"""test that the "hasparent" flag works properly when lazy loaders and backrefs are used"""
class Post(object):pass
class Blog(object):pass
attributes.register_class(Post)
attributes.register_class(Blog)
# set up instrumented attributes with backrefs
attributes.register_attribute(Post, 'blog', uselist=False, extension=attributes.GenericBackrefExtension('posts'), trackparent=True, useobject=True)
attributes.register_attribute(Blog, 'posts', uselist=True, extension=attributes.GenericBackrefExtension('blog'), trackparent=True, useobject=True)
# create objects as if they'd been freshly loaded from the database (without history)
b = Blog()
p1 = Post()
attributes.instance_state(b).set_callable('posts', lambda:[p1])
attributes.instance_state(p1).set_callable('blog', lambda:b)
p1, attributes.instance_state(b).commit_all()
# no orphans (called before the lazy loaders fire off)
assert attributes.has_parent(Blog, p1, 'posts', optimistic=True)
assert attributes.has_parent(Post, b, 'blog', optimistic=True)
# assert connections
assert p1.blog is b
assert p1 in b.posts
# manual connections
b2 = Blog()
p2 = Post()
b2.posts.append(p2)
assert attributes.has_parent(Blog, p2, 'posts')
assert attributes.has_parent(Post, b2, 'blog')
开发者ID:jrus，项目名称:sqlalchemy，代码行数:33，代码来源:attributes.py
示例10: test_list
def test_list(self):
class User(object):pass
class Address(object):pass
attributes.register_class(User)
attributes.register_class(Address)
attributes.register_attribute(User, 'user_id', uselist=False, useobject=False)
attributes.register_attribute(User, 'user_name', uselist=False, useobject=False)
attributes.register_attribute(User, 'addresses', uselist = True, useobject=True)
attributes.register_attribute(Address, 'address_id', uselist=False, useobject=False)
attributes.register_attribute(Address, 'email_address', uselist=False, useobject=False)
u = User()
u.user_id = 7
u.user_name = 'john'
u.addresses = []
a = Address()
a.address_id = 10
a.email_address = '[email protected]'
u.addresses.append(a)
self.assert_(u.user_id == 7 and u.user_name == 'john' and u.addresses[0].email_address == '[email protected]')
u, attributes.instance_state(a).commit_all()
self.assert_(u.user_id == 7 and u.user_name == 'john' and u.addresses[0].email_address == '[email protected]')
u.user_name = 'heythere'
a = Address()
a.address_id = 11
a.email_address = '[email protected]'
u.addresses.append(a)
self.assert_(u.user_id == 7 and u.user_name == 'heythere' and u.addresses[0].email_address == '[email protected]' and u.addresses[1].email_address == '[email protected]')
开发者ID:jrus，项目名称:sqlalchemy，代码行数:31，代码来源:attributes.py
示例11: test_scalar
def test_scalar(self):
class Foo(_base.BasicEntity):
pass
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False)
# case 1. new object
f = Foo()
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
f.someattr = "hi"
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), (['hi'], (), ()))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), ['hi'], ()))
f.someattr = 'there'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), (['there'], (), ['hi']))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), ['there'], ()))
del f.someattr
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), (), ['there']))
# case 2. object with direct dictionary settings (similar to a load operation)
f = Foo()
f.__dict__['someattr'] = 'new'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
f.someattr = 'old'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), (['old'], (), ['new']))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), ['old'], ()))
# setting None on uninitialized is currently a change for a scalar attribute
# no lazyload occurs so this allows overwrite operation to proceed
f = Foo()
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), (), ()))
f.someattr = None
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([None], (), ()))
f = Foo()
f.__dict__['someattr'] = 'new'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), ['new'], ()))
f.someattr = None
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([None], (), ['new']))
# set same value twice
f = Foo()
attributes.instance_state(f).commit(['someattr'])
f.someattr = 'one'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), (['one'], (), ()))
f.someattr = 'two'
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), (['two'], (), ()))
开发者ID:jrus，项目名称:sqlalchemy，代码行数:58，代码来源:attributes.py
示例12: test_deferred
def test_deferred(self):
for base in (object, MyBaseClass, MyClass):
class Foo(base):
pass
data = {'a': 'this is a', 'b': 12}
def loader(state, keys):
for k in keys:
state.dict[k] = data[k]
return attributes.ATTR_WAS_SET
manager = register_class(Foo)
manager.deferred_scalar_loader = loader
attributes.register_attribute(
Foo, 'a', uselist=False, useobject=False)
attributes.register_attribute(
Foo, 'b', uselist=False, useobject=False)
if base is object:
assert Foo not in \
instrumentation._instrumentation_factory._state_finders
else:
assert Foo in \
instrumentation._instrumentation_factory._state_finders
f = Foo()
attributes.instance_state(f)._expire(
attributes.instance_dict(f), set())
eq_(f.a, "this is a")
eq_(f.b, 12)
f.a = "this is some new a"
attributes.instance_state(f)._expire(
attributes.instance_dict(f), set())
eq_(f.a, "this is a")
eq_(f.b, 12)
attributes.instance_state(f)._expire(
attributes.instance_dict(f), set())
f.a = "this is another new a"
eq_(f.a, "this is another new a")
eq_(f.b, 12)
attributes.instance_state(f)._expire(
attributes.instance_dict(f), set())
eq_(f.a, "this is a")
eq_(f.b, 12)
del f.a
eq_(f.a, None)
eq_(f.b, 12)
attributes.instance_state(f)._commit_all(
attributes.instance_dict(f))
eq_(f.a, None)
eq_(f.b, 12)
开发者ID:anti-social，项目名称:sqlalchemy，代码行数:57，代码来源:test_extendedattr.py
示例13: test_null_instrumentation
def test_null_instrumentation(self):
class Foo(MyBaseClass):
pass
attributes.register_class(Foo)
attributes.register_attribute(Foo, "name", uselist=False, useobject=False)
attributes.register_attribute(Foo, "bars", uselist=True, trackparent=True, useobject=True)
assert Foo.name == attributes.manager_of_class(Foo)['name']
assert Foo.bars == attributes.manager_of_class(Foo)['bars']
开发者ID:chatch，项目名称:pinyin-toolkit，代码行数:9，代码来源:test_extendedattr.py
示例14: instrument_class
def instrument_class(self, mapper):
attributes.register_attribute(
mapper.class_,
self.key,
comparator=self.Comparator(self, mapper),
parententity=mapper,
doc=self.doc,
impl_class=GenericAttributeImpl,
parent_token=self
)
开发者ID:akash01，项目名称:blog-flask，代码行数:10，代码来源:generic.py
示例15: test_object_collections_set
def test_object_collections_set(self):
class Foo(fixtures.Base):
pass
class Bar(fixtures.Base):
def __nonzero__(self):
assert False
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True)
hi = Bar(name='hi')
there = Bar(name='there')
old = Bar(name='old')
new = Bar(name='new')
# case 1. new object
f = Foo()
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [], []))
f.someattr = [hi]
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([hi], [], []))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [hi], []))
f.someattr = [there]
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([there], [], [hi]))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [there], []))
f.someattr = [hi]
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([hi], [], [there]))
f.someattr = [old, new]
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([old, new], [], [there]))
# case 2. object with direct settings (similar to a load operation)
f = Foo()
collection = attributes.init_collection(f, 'someattr')
collection.append_without_event(new)
f._state.commit_all()
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [new], []))
f.someattr = [old]
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([old], [], [new]))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [old], []))
开发者ID:Frihet，项目名称:sqlalchemy-patches，代码行数:50，代码来源:attributes.py
示例16: test_collectionclasses
def test_collectionclasses(self):
class Foo(object):pass
attributes.register_class(Foo)
attributes.register_attribute(Foo, "collection", uselist=True, typecallable=set, useobject=True)
assert isinstance(Foo().collection, set)
attributes.unregister_attribute(Foo, "collection")
try:
attributes.register_attribute(Foo, "collection", uselist=True, typecallable=dict, useobject=True)
assert False
except exceptions.ArgumentError, e:
assert str(e) == "Type InstrumentedDict must elect an appender method to be a collection class"
开发者ID:Frihet，项目名称:sqlalchemy-patches，代码行数:14，代码来源:attributes.py
示例17: test_object_collections_set
def test_object_collections_set(self):
class Foo(_base.BasicEntity):
pass
class Bar(_base.BasicEntity):
def __nonzero__(self):
assert False
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=True, useobject=True)
hi = Bar(name='hi')
there = Bar(name='there')
old = Bar(name='old')
new = Bar(name='new')
# case 1. new object
f = Foo()
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [], ()))
f.someattr = [hi]
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([hi], [], []))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [hi], ()))
f.someattr = [there]
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([there], [], [hi]))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [there], ()))
f.someattr = [hi]
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([hi], [], [there]))
f.someattr = [old, new]
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([old, new], [], [there]))
# case 2. object with direct settings (similar to a load operation)
f = Foo()
collection = attributes.init_collection(attributes.instance_state(f), 'someattr')
collection.append_without_event(new)
attributes.instance_state(f).commit_all()
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [new], ()))
f.someattr = [old]
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ([old], [], [new]))
attributes.instance_state(f).commit(['someattr'])
eq_(attributes.get_history(attributes.instance_state(f), 'someattr'), ((), [old], ()))
开发者ID:jrus，项目名称:sqlalchemy，代码行数:50，代码来源:attributes.py
示例18: test_scalar
def test_scalar(self):
class Foo(fixtures.Base):
pass
attributes.register_class(Foo)
attributes.register_attribute(Foo, 'someattr', uselist=False, useobject=False)
# case 1. new object
f = Foo()
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [], []))
f.someattr = "hi"
self.assertEquals(attributes.get_history(f._state, 'someattr'), (['hi'], [], []))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], ['hi'], []))
f.someattr = 'there'
self.assertEquals(attributes.get_history(f._state, 'someattr'), (['there'], [], ['hi']))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], ['there'], []))
del f.someattr
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [], ['there']))
# case 2. object with direct dictionary settings (similar to a load operation)
f = Foo()
f.__dict__['someattr'] = 'new'
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], ['new'], []))
f.someattr = 'old'
self.assertEquals(attributes.get_history(f._state, 'someattr'), (['old'], [], ['new']))
f._state.commit(['someattr'])
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], ['old'], []))
# setting None on uninitialized is currently a change for a scalar attribute
# no lazyload occurs so this allows overwrite operation to proceed
f = Foo()
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], [], []))
f.someattr = None
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([None], [], []))
f = Foo()
f.__dict__['someattr'] = 'new'
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([], ['new'], []))
f.someattr = None
self.assertEquals(attributes.get_history(f._state, 'someattr'), ([None], [], ['new']))
开发者ID:Frihet，项目名称:sqlalchemy-patches，代码行数:50，代码来源:attributes.py
示例19: test_collection_with_backref
def test_collection_with_backref(self):
for base in (object, MyBaseClass, MyClass):
class Post(base):
pass
class Blog(base):
pass
register_class(Post)
register_class(Blog)
attributes.register_attribute(
Post,
"blog",
uselist=False,
backref="posts",
trackparent=True,
useobject=True,
)
attributes.register_attribute(
Blog,
"posts",
uselist=True,
backref="blog",
trackparent=True,
useobject=True,
)
b = Blog()
(p1, p2, p3) = (Post(), Post(), Post())
b.posts.append(p1)
b.posts.append(p2)
b.posts.append(p3)
self.assert_(b.posts == [p1, p2, p3])
self.assert_(p2.blog is b)
p3.blog = None
self.assert_(b.posts == [p1, p2])
p4 = Post()
p4.blog = b
self.assert_(b.posts == [p1, p2, p4])
p4.blog = b
p4.blog = b
self.assert_(b.posts == [p1, p2, p4])
# assert no failure removing None
p5 = Post()
p5.blog = None
del p5.blog
开发者ID:BY-jk，项目名称:sqlalchemy，代码行数:49，代码来源:test_extendedattr.py
示例20: test_onetoone
def test_onetoone(self):
class Port(object):pass
class Jack(object):pass
attributes.register_class(Port)
attributes.register_class(Jack)
attributes.register_attribute(Port, 'jack', uselist=False, extension=attributes.GenericBackrefExtension('port'), useobject=True)
attributes.register_attribute(Jack, 'port', uselist=False, extension=attributes.GenericBackrefExtension('jack'), useobject=True)
p = Port()
j = Jack()
p.jack = j
self.assert_(j.port is p)
self.assert_(p.jack is not None)
j.port = None
self.assert_(p.jack is None)
开发者ID:jrus，项目名称:sqlalchemy，代码行数:15，代码来源:attributes.py
注：本文中的sqlalchemy.orm.attributes.register_attribute函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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