[Zope3-Users] Permissions to use IWriteZopeDublinCore

[Bernd Dorn]

On 17.05.2007, at 18:56, Kevin Gill (Newaddress) wrote:

> Hi,
>
> I am putting together a simple application based on Philipp Von
> Weitershausen's book.
>
> When an object is updated, I update the Dublin Core metadata in an  
> event
> handler. The code is similar to the following...
>
> @adapter(IListing, IObjectModifiedEvent)
> def updateListingDCTitle(listing, event):
>     dc = IWriteZopeDublinCore(listing)
>     dc.title=u'TEST UPDATE'
>

u can remove the security proxy

from zope.app.security.proxy import removeSecurityProxy

removeSecurityProxy(dc).title = ...


> The ZCML declaration is...
>
> <subscriber handler=".actor.updateListingDCTitle" />
>
> I have configured a user who can edit the 'Listing'. When they try to
> edit the listing, they get a permissions error caused by the event
> handler.
>
>
>
> If I assign permissions to the editor to modify the Dublin Core
> metadata, they get access to the meta-data tab in the ZMI user
> interface, which I would rather avoid. This grant works but I am  
> looking
> for a better way of doing this.
>
>   <grant permission="zope.app.dublincore.change"
>         role="directory.Editor" />
>
>
>
> How should I go about letting the event handler update the Dublin Core
> metadata?
>
> I tried adding trusted="true" to the subscriber zcml declaration, but
> this is ignored when a handler is used rather than a factory.
>
>
> Thanks
>
> Kevin
>
>
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