3751952d34
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1543 fd906abe-77d9-0310-91a1-e0d9ade77398
61 lines
1.6 KiB
Text
61 lines
1.6 KiB
Text
=========================
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Zope-based Object Storage
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=========================
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($Id$)
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>>> from zope.app.testing.setup import placefulSetUp, placefulTearDown
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>>> site = placefulSetUp(True)
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As the Zope-based storage keeps track of the objects using unique ids
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we need a utility that provides these. For testing we use a dummy
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implementation; the real stuff is in zope.app.intids and there must
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be a corresponding utility in the root site folder of your Zope.
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>>> from zope import component
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>>> from cybertools.relation.tests import IntIdsStub
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>>> component.provideUtility(IntIdsStub())
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We first need a class from which we will create objects that later on
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will be stored in and retrieved from the storage.
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>>> class Content(object):
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... title = 'demo'
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>>> c1 = Content()
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>>> c1.title
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'demo'
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>>> c1.title = 'changed'
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>>> c1.title
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'changed'
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We can save the object in the storage by getting a storage adapter
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from the corresponding factory in the `manager` module and calling
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`save()` on it.
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>>> from cybertools.storage.pzope.base import storages
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>>> persistent = storages(c1)
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>>> c1Uid = persistent.save('/c1')
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For loading an object we get a storage adapter to the object's class and
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call `load()` on it, providing the UID we had got back when saving the
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object.
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>>> persistent = storages(Content)
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>>> c2 = persistent.load(c1Uid)
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>>> c2.title
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'changed'
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If an object has been stored to the storage or loaded from it it has got
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an `address` attribut that will be used for subsequent accesses to the
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storage.
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>>> persistent.address
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u'/c1'
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Fin de partie
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=============
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>>> placefulTearDown()
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