ftw.dictstorage 1.3.0

简介

此包提供了一种存储键值对的层。可以通过提供在哪个上下文中使用字典存储的 IConfig 适配器来动态配置存储。

示例

适配器默认使用非持久性字典

>>> from ftw.dictstorage.interfaces import IDictStorage

>>> context = layer['example_context']
>>> print context
<ftw.dictstorage.testing.ExampleContext object at ...>

>>> storage = IDictStorage(context)
>>> storage['key'] = 'value'
>>> print storage['key']
value

>>> print storage.storage
{'key': 'value'}

>>> print IDictStorage(context).storage
{}

要配置自定义存储，实现自己的 IConfig，它使用自定义 IDictStorage

>>> from ftw.dictstorage.interfaces import IConfig
>>> from ftw.dictstorage.base import DictStorage
>>> from zope.component import provideAdapter, adapts
>>> from zope.interface import Interface, alsoProvides, implements

>>> context = layer['example_context']
>>> class IMyContext(Interface):
...     pass
>>> alsoProvides(context, IMyContext)

>>> class ContextStorageConfig(object):
...     implements(IConfig)
...     adapts(IMyContext)
...
...     def __init__(self, context):
...         self.context = context
...
...     def get_storage(self):
...         if not hasattr(self.context, '_dictstorage'):
...             self.context._dictstorage = {}
...         return self.context._dictstorage
>>> provideAdapter(ContextStorageConfig)

>>> class ContextDictStorage(DictStorage):
...     implements(IDictStorage)
...     adapts(IMyContext, IConfig)
...
...     def __init__(self, context, config):
...         self.context = context
...         self.config = config
...         self._storage = config.get_storage()
...
...     @property
...     def storage(self):
...         return self._storage
...
>>> provideAdapter(ContextDictStorage)

>>> storage = IDictStorage(context)
>>> storage['foo'] = 'bar'
>>> print storage['foo']
bar

>>> print context._dictstorage
{'foo': 'bar'}

>>> print IDictStorage(context)['foo']
bar

兼容性

与 Plone 4.2、4.3、5.1 兼容。

链接

• Github: https://github.com/4teamwork/ftw.dictstorage

• 问题： https://github.com/4teamwork/ftw.dictstorage/issues

• Pypi: http://pypi.python.org/pypi/ftw.dictstorage

• 持续集成： https://jenkins.4teamwork.ch/search?q=ftw.dictstorage

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