Plone- ComponentLookUpError is preventing me from deleting Plone site? - plone

Question

I'm trying to delete a Plone site I am testing. However, when I delete it, I get an error.
From the console:
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 OFS.ObjectManager, line 540, in manage_delObjects
Module OFS.ObjectManager, line 391, in _delObject
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 OFS.subscribers, line 101, in dispatchObjectWillBeMovedEvent
Module zope.container.contained, line 153, in dispatchToSublocations
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 OFS.subscribers, line 101, in dispatchObjectWillBeMovedEvent
Module zope.container.contained, line 153, in dispatchToSublocations
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 OFS.subscribers, line 101, in dispatchObjectWillBeMovedEvent
Module zope.container.contained, line 153, in dispatchToSublocations
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 OFS.subscribers, line 101, in dispatchObjectWillBeMovedEvent
Module zope.container.contained, line 153, in dispatchToSublocations
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 OFS.subscribers, line 101, in dispatchObjectWillBeMovedEvent
Module zope.container.contained, line 153, in dispatchToSublocations
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 Products.CMFCore.CMFCatalogAware, line 271, in handleContentishEvent
Module Products.CMFCore.CMFCatalogAware, line 76, in unindexObject
Module Products.CMFCore.CatalogTool, line 280, in unindexObject
Module Products.CMFPlone.CatalogTool, line 354, in uncatalog_object
Module Products.ZCatalog.ZCatalog, line 508, in uncatalog_object
Module Products.ZCatalog.Catalog, line 383, in uncatalogObject
Module Products.PluginIndexes.common.UnIndex, line 286, in unindex_object
Module Products.PluginIndexes.UUIDIndex.UUIDIndex, line 98, in removeForwardIndexEntry
Module z3c.relationfield.relation, line 79, in __cmp__
Module z3c.relationfield.relation, line 82, in _sort_key
Module z3c.relationfield.relation, line 31, in from_path
Module plone.app.relationfield.monkey, line 14, in get_from_object
Module z3c.relationfield.relation, line 110, in _object
Module zope.component._api, line 169, in getUtility
ComponentLookupError: (<InterfaceClass zope.intid.interfaces.IIntIds>, '')
The page just displays:
(<InterfaceClass zope.intid.interfaces.IIntIds>, '')
I do use IIntIds in an event subscriber and I am wondering maybe if this could be the problem.
When a object of a particular content type transitions, another object of another content type is created and I "get" a relation value from the created object using the IIntIds utility. The RelationValue is appended to the relatedItems of the object transitioning.
The object created has relatedItems as well and I get the relation value of the object transitioning and append it to the created object's relatedItems.
In configure.zcml:
<subscriber
for="my.product.myobject.MyObject
Products.DCWorkflow.interfaces.IAfterTransitionEvent"
handler=".events.myObjectTransitioned" />
In events.py:
def myObjectTransitioned(obj,event):
....
action = event.status['complete']
if action == 'activate':
.....
try:
new_obj = api.content.create(container=OtherObjs,portal_type='my.object.anotherobject',
title=a_concat_title, id=a_concat_title)
int_ids = getUtility(IIntIds)
obj.relatedItems.append(RelationValue(int_ids.getId(new_obj)))
new_obj.relatedItems.append(RelationValue(int_ids.getId(obj)))
obj.reindexObject()
new_obj.reindexObject()
except:
print "failed creation"
I came across a similar question that was asked and one of the answers mentioned not having plone.app.relationfield or plone.app.intId installed. I have plone.app.relationfield (RelationValue) and plone.app.intId (plone.app.intid: install utility).
I'm basically doing this so that the new_obj can get information from obj (transitioned object), and visa versa, by conveniently calling to_object. However, I'm guessing this is causing this error and I should use a back reference for new_obj getting information from obj?

Answer 1

What basically prevents you from deleting your site are the events that are triggered everytime (that run your mentioned troublesome code). To prevent this behavior, I can suggest doing the following:
$ cd {buildout-dir}
$ bin/zopepy
> from transaction import commit
> app._delObject('Plone', suppress_events=True)
> commit()
In general it is not recommended to do this for objects within a Plone site, as this would for example also prevent the portal_catalog from updating and cause other side effects. But as you delete the site as a whole, it does not matter.