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Name: zope.container
Version: 3.12.0
Summary: Zope Container
Home-page: http://pypi.python.org/pypi/zope.container
Author: Zope Foundation and Contributors
Author-email: zope-dev@zope.org
License: ZPL 2.1
Description: This package define interfaces of container components, and provides
container implementations such as a BTreeContainer and
OrderedContainer, as well as the base class used by ``zope.site.folder``
for the Folder implementation.
.. contents::
=========================
Containment constraints
=========================
Containment constraints allow us to express restrictions on the types
of items that can be placed in containers or on the types of
containers an item can be placed in. We express these constraints in
interfaces. Let's define some container and item interfaces:
>>> from zope.container.interfaces import IContainer
>>> from zope.location.interfaces import IContained
>>> from zope.container.constraints import containers, contains
>>> class IBuddyFolder(IContainer):
... contains('.IBuddy')
In this example, we used the contains function to declare that objects
that provide IBuddyFolder can only contain items that provide IBuddy.
Note that we used a string containing a dotted name for the IBuddy
interface. This is because IBuddy hasn't been defined yet. When we
define IBuddy, we can use IBuddyFolder directly:
>>> class IBuddy(IContained):
... containers(IBuddyFolder)
Now, with these interfaces in place, we can define Buddy and
BuddyFolder classes and verify that we can put buddies in buddy
folders:
>>> from zope import interface
>>> class Buddy:
... interface.implements(IBuddy)
>>> class BuddyFolder:
... interface.implements(IBuddyFolder)
>>> from zope.container.constraints import checkObject, checkFactory
>>> from zope.component.factory import Factory
>>> checkObject(BuddyFolder(), 'x', Buddy())
>>> checkFactory(BuddyFolder(), 'x', Factory(Buddy))
True
If we try to use other containers or folders, we'll get errors:
>>> class Container:
... interface.implements(IContainer)
>>> class Contained:
... interface.implements(IContained)
>>> checkObject(Container(), 'x', Buddy())
... # doctest: +ELLIPSIS
Traceback (most recent call last):
InvalidContainerType: ...
>>> checkFactory(Container(), 'x', Factory(Buddy))
False
>>> checkObject(BuddyFolder(), 'x', Contained())
... # doctest: +ELLIPSIS
Traceback (most recent call last):
InvalidItemType: ...
>>> checkFactory(BuddyFolder(), 'x', Factory(Contained))
False
In the example, we defined the container first and then the items. We
could have defined these in the opposite order:
>>> class IContact(IContained):
... containers('.IContacts')
>>> class IContacts(IContainer):
... contains(IContact)
>>> class Contact:
... interface.implements(IContact)
>>> class Contacts:
... interface.implements(IContacts)
>>> checkObject(Contacts(), 'x', Contact())
>>> checkFactory(Contacts(), 'x', Factory(Contact))
True
>>> checkObject(Contacts(), 'x', Buddy())
... # doctest: +ELLIPSIS
Traceback (most recent call last):
InvalidItemType: ...
>>> checkFactory(Contacts(), 'x', Factory(Buddy))
False
The constraints prevent us from moving a container beneath itself (either into
itself or another folder beneath it):
>>> container = Container()
>>> checkObject(container, 'x', container)
Traceback (most recent call last):
TypeError: Cannot add an object to itself or its children.
>>> import zope.location.interfaces
>>> import zope.interface
>>> subcontainer = Container()
>>> zope.interface.directlyProvides(subcontainer,
... zope.location.interfaces.ILocation)
>>> subcontainer.__parent__ = container
>>> checkObject(subcontainer, 'x', container)
Traceback (most recent call last):
TypeError: Cannot add an object to itself or its children.
=======
CHANGES
=======
3.12.0 (2010-12-14)
-------------------
- Fix detection of moving folders into itself or a subfolder of itself.
(#118088)
- Fixed ZCML-related tests and dependencies.
- Added ``zcml`` extra dependencies.
3.11.1 (2010-04-30)
-------------------
- Prefer the standard libraries doctest module to the one from zope.testing.
- Added compatibility with ZODB3 3.10 by importing the IBroken interface from
it directly. Once we can rely on the new ZODB3 version exclusively, we can
remove the dependency onto the zope.broken distribution.
- Never fail if the suggested name is in a wrong type (#227617)
- ``checkName`` first checks the parameter type before the emptiness.
3.11.0 (2009-12-31)
-------------------
- Copy two trivial classes from zope.cachedescriptors into this package, which
allows us to remove that dependency. We didn't actually use any caching
properties as the dependency suggested.
3.10.1 (2009-12-29)
-------------------
- Moved zope.copypastemove related tests into that package.
- Removed no longer used zcml prefix from the configure file.
- Stop importing DocTestSuite from zope.testing.doctestunit. Fixes
compatibility problems with zope.testing 3.8.4.
3.10.0 (2009-12-15)
-------------------
- Break testing dependency on zope.app.testing.
- Break testing dependency on zope.app.dependable by moving the code and tests
into that package.
- Import ISite from zope.component after it was moved there from
zope.location.
3.9.1 (2009-10-18)
------------------
- Rerelease 3.9.0 as it had a broken Windows 2.6 egg.
- Marked as part of the ZTK.
3.9.0 (2009-08-28)
------------------
- Previous releases should be versioned 3.9.0 as they are not pure bugfix
releases and worth a "feature" release, increasing feature version.
Packages that depend on any changes introduced in version 3.8.2 or 3.8.3
should depend on version 3.9 or greater.
3.8.3 (2009-08-27)
------------------
- Move IXMLRPCPublisher ZCML registrations for containers from
zope.app.publisher.xmlrpc to zope.container for now.
3.8.2 (2009-05-17)
------------------
- Rid ourselves of ``IContained`` interface. This interface was moved
to ``zope.location.interfaces``. A b/w compat import still exists
to keep old code running. Depend on ``zope.location``>=3.5.4.
- Rid ourselves of the implementations of ``IObjectMovedEvent``,
``IObjectAddedEvent``, ``IObjectRemovedEvent`` interfaces and
``ObjectMovedEvent``, ``ObjectAddedEvent`` and
``ObjectRemovedEvent`` classes. B/w compat imports still exist.
All of these were moved to ``zope.lifecycleevent``. Depend on
``zope.lifecycleevent``>=3.5.2.
- Fix a bug in OrderedContainer where trying to set the value for a
key that already exists (duplication error) would actually delete the
key from the order, leaving a dangling reference.
- Partially break dependency on ``zope.traversing`` by disusing
zope.traversing.api.getPath in favor of using
ILocationInfo(object).getPath(). The rest of the runtime
dependencies on zope.traversing are currently interface
dependencies.
- Break runtime dependency on ``zope.app.dependable`` by using a zcml
condition on the qsubscriber ZCML directive that registers the
CheckDependency handler for IObjectRemovedEvent. If
``zope.app.dependable`` is not installed, this subscriber will never
be registered. ``zope.app.dependable`` is now a testing dependency
only.
3.8.1 (2009-04-03)
------------------
- Fixed misspackaged 3.8.0
3.8.0 (2009-04-03)
------------------
- Change configure.zcml to not depend on zope.app.component.
Fixes: https://bugs.launchpad.net/bugs/348329
- Moved the declaration of ``IOrderedContainer.updateOrder`` to a new, basic
``IOrdered`` interface and let ``IOrderedContainer`` inherit it. This allows
easier reuse of the declaration.
3.7.2 (2009-03-12)
------------------
- Fix: added missing ComponentLookupError, missing since revision 95429 and
missing in last release.
- Adapt to the move of IDefaultViewName from zope.component.interfaces
to zope.publisher.interfaces.
- Add support for reserved names for containers. To specify reserved
names for some container, you need to provide an adapter from the
container to the ``zope.container.interfaces.IReservedNames`` interface.
The default NameChooser is now also aware of reserved names.
3.7.1 (2009-02-05)
------------------
- Raise more "Pythonic" errors from ``__setitem__``, losing the dependency
on ``zope.exceptions``:
o ``zope.exceptions.DuplicationError`` -> ``KeyError``
o ``zope.exceptions.UserError`` -> ``ValueError``
- Moved import of ``IBroken`` interface to use new ``zope.broken``
package, which has no dependencies beyond ``zope.interface``.
- Made ``test`` part pull in the extra test requirements of this package.
- Split the ``z3c.recipe.compattest`` configuration out into a new file,
``compat.cfg``, to reduce the burden of doing standard unit tests.
- Stripped out bogus develop eggs from ``buildout.cfg``.
3.7.0 (2009-01-31)
------------------
- Split this package off ``zope.app.container``. This package is
intended to have far less dependencies than ``zope.app.container``.
- This package also contains the container implementation that
used to be in ``zope.app.folder``.
Keywords: zope container
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Zope Public License
Classifier: Programming Language :: Python
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Framework :: Zope3
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