[Product-Developers] Re: Post-create update of a reference field

Andreas Jung lists at zopyx.com
Thu Jun 11 09:28:19 UTC 2009


On 11.06.09 11:24, Maurits van Rees wrote:
> Andreas Jung, on 2009-06-11:
>   
>> Hi there,
>>
>> following use case: an AT-Event derived content-type contains provides
>> a "create sub-event" link within its default view. Clicking on the link
>> will create a new event and add the new event to a referencefield within
>> the original event (standard master-slave relationship). This works fine
>> with invokeFactory() and updating the related fields within a browser view.
>> However I want to use portal_factory in order to avoid orphan event. Any
>> idea
>> how to update the referencefield of the master event after the creating
>> of the
>> slave event through portal_factory?
>>     
> Register a zope 3 event handler for the sub event type and
> Products.Archetypes.interfaces.IObjectInitializedEvent
>
> In that handler check if the parent of the object is an instance of
> your AT-Event derived content-type and set the reference field.
Object subscriber won't work because the events aren't nested and the
parent container
does not know about the original object :-)

Andreas
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