Wichert Akkerman schrieb:
> Previously Raphael Ritz wrote:
>> ickewa wrote:
>>> Hello,
>>>
>>> as already mentioned in the subject, I would like to know if its possible
>>> to
>>> check if an interface is provided by an object inside a tales expression.
>>>
>>> I would like to use this in genericsetup/actions.xml as a condition
>>> expression.
>> Hm, not sure.
>>
>> Definitively not in the way you would do it from code because
>> you cannot import the interface in TALES.
>>
>> I know that in the old days Plone grew the interface tool
>> (portal_interface or so) to support exactly this for the
>> old Zope 2-style interface checks but I simply don't know
>> whether this has been extended to Zope 3 interfaces.
>>
>
> There's a plone_interface or similarly named view that may be useful.
> It's defined in plone.app.layout.
>
> Wichert.
>
it works but the expression looks a bit complicated:
python:
path('nocall:here/plone_interface_info/provides')('my.interface.name')
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