如何清理zc.relation目录上的旧接口? [英] How to clean up old interfaces on zc.relation catalog?

问题描述

我在Plone上使用 plone.directives.form 版本1.0 4.2.5以及升级到4.2.6之后，由于plone.directives.form升级到版本1.1，我开始看到以下回溯，并且猜测.

I was using plone.directives.form version 1.0 with Plone 4.2.5 and after upgrading to 4.2.6 I started seeing the following traceback and I guess its due to plone.directives.form being upgraded to version 1.1.

如何避免此错误?并非来自默认Plone的唯一代码行是在der.freitag.handlers上，在该代码上执行transaction.commit()并且内容类型只是常规的灵巧内容类型.

How can I avoid this error? The only line of code that is not from default Plone on the traceback is on der.freitag.handlers where it does a transaction.commit() and the content type is just a regular dexterity content type.

1385740390.020.496977141203 http://10.100.0.207:8081/website/front-page/atomkraft/++add++der.freitag.customizablearticlelink
Traceback (innermost last):
 Module ZPublisher.Publish, line 138, in publish
 Module ZPublisher.mapply, line 77, in mapply
 Module ZPublisher.Publish, line 48, in call_object
 Module plone.z3cform.layout, line 70, in __call__
 Module plone.z3cform.layout, line 54, in update
 Module plone.dexterity.browser.add, line 112, in update
 Module plone.z3cform.fieldsets.extensible, line 59, in update
 Module plone.z3cform.patch, line 30, in GroupForm_update
 Module z3c.form.group, line 138, in update
 Module z3c.form.action, line 99, in execute
 Module z3c.form.button, line 315, in __call__
 Module z3c.form.button, line 170, in __call__
 Module plone.dexterity.browser.add, line 99, in handleAdd
 Module z3c.form.form, line 247, in createAndAdd
 Module plone.dexterity.browser.add, line 78, in add
 Module plone.dexterity.utils, line 152, in addContentToContainer
 Module Products.BTreeFolder2.BTreeFolder2, line 455, in _setObject
 Module zope.event, line 31, in notify
 Module zope.component.event, line 24, in dispatch
 Module zope.component._api, line 136, in subscribers
 Module zope.component.registry, line 321, in subscribers
 Module zope.interface.adapter, line 585, in subscribers
 Module zope.component.event, line 32, in objectEventNotify
 Module zope.component._api, line 136, in subscribers
 Module zope.component.registry, line 321, in subscribers
 Module zope.interface.adapter, line 585, in subscribers
 Module der.freitag.handlers, line 126, in set_customizable_article_link_id
 Module transaction._manager, line 89, in commit
 Module transaction._transaction, line 329, in commit
 Module transaction._transaction, line 443, in _commitResources
 Module ZODB.Connection, line 567, in commit
 Module ZODB.Connection, line 623, in _commit
 Module ZODB.Connection, line 658, in _store_objects
 Module ZODB.serialize, line 422, in serialize
 Module ZODB.serialize, line 431, in _dump
PicklingError: Can't pickle <class 'plone.directives.form.schema.Schema'>: attribute lookup plone.directives.form.schema.Schema failed

编辑:正在创建的对象具有一个关系字段(a z3c.relationfield.schema.RelationChoice)，事实证明zc.relation保留了由任何关系的每个成员提供的所有接口的列表.因此，从plone.directives.form版本1.0升级到1.1版之后，plone.directives.form上的接口将不再能解决.

the object that is being created has a relation field (a z3c.relationfield.schema.RelationChoice) and it turns out that zc.relation keeps a list of all interfaces provided by each member of any relation. Thus, after upgrading from plone.directives.form version 1.0 to version 1.1 the interfaces on plone.directives.form can no longer be resolved.

从 z3c.relationfield 文档中，我看不到任何更新关系的选项，因此唯一的解决方案是获取所有关系并重新创建它们?

From z3c.relationfield documentation I don't see any option to update relations, so the only solution would be to get all relations and recreate them?

推荐答案

仅供参考，这就是我如何解决的问题:

Just for reference that's how I fixed it:

虽然仍在plone.directives.form 1.0上，但会更新对象，以使它们不再提供plone.directives.form.schema.Schema接口.

While still on plone.directives.form 1.0 update your objects so that they do no longer provide the plone.directives.form.schema.Schema interface.

然后重新创建关系:

from z3c.relationfield import RelationValue
from zc.relation.interfaces import ICatalog
from zope.app.intid.interfaces import IIntIds
from zope.component import getUtility
from zope.event import notify
from zope.lifecycleevent import ObjectModifiedEvent

logger = logging.getLogger(LOGGER)
relations_catalog = getUtility(ICatalog)
intids = getUtility(IIntIds)

relations = [rel for rel in relations_catalog.findRelations()]
len_relations = len(relations)
logger.info('Relations needed to update: {0}'.format(len_relations))

for relation in relations:
    # get the object link and the object linked
    object_with_link = relation.from_object
    object_linked_to = relation.to_object

    # remove the broken relation
    object_with_link.reference = None

    # let the catalog remove the old relation
    notify(ObjectModifiedEvent(object_with_link))

    # create a new relation
    object_linked_to_intid = intids.getId(object_linked_to)
    new_relation = RelationValue(object_linked_to_intid)
    object_with_link.reference = new_relation

    # let the catalog know about this new relation
    notify(ObjectModifiedEvent(object_with_link))

在此之后，停止实例，再次运行buildout以将plone.directives.form更新到版本1.1和voilà！

After this, stop the instance, run buildout again to update plone.directives.form to version 1.1 and voilà!

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