[Zope3-Users] Re: Conflicting configuration actions for protectName __setitem__

[Philipp von Weitershausen]

Rob Campbell wrote:
> Hi Darryl,
> 
> That is how I had the IFosterRecord interface before, and I got a lot 
> more errors than just __setitem__.  I am only getting the __setitem__ 
> error now, after changing it to something like:
> 
> class IFosterRecord(Interface):
> 
>   contains('.IFosterSource')
> 
>   title = TextLine(...)
> 
> and the implementation is:
> 
> class FosterRecord(BTreeContainer):
> 
>   implements(IFosterRecord)
> 
>   title = FieldProperty(IFosterRecord['title'])
> 
> I think the problem is coming from contains(). 

Yup. contains() adds a __setitem__ method to the interface.