[Zope3-Users] Re: proxied list object in a schema

[Tim Terlegård]

Hi Jürgen,

Actually Chat implements IChat, I forgot that line.

Are all attributes of an object proxied or are for instance attributes
starting with _ not proxied?

Tim


> Hi Tim,
> Chat must implement IChat
> 
> Jürgen
> 
> Tim Terlegård wrote:
> >Would someone like to explain how to use a list in a schema object
> >without getting ForbiddenAttribute? This is my use case.
> >
> >class IChat(Interface):
> >    messages = Attribute('Chat messages')
> >
> >class Chat(Persistent):
> >    def __init__(self):
> >        self.messages = persistent.list.PersistentList()
> >
> ><class class=".chat.Chat">
> >    <require permission="zope.View" interface=".interfaces.IChat" />
> >    <require permission="zope.View" set_schema=".interfaces.IChat" />
> ></class>
> >
> >I have a Chat class that implements IChat and that is declared in
> >configure.zcml. Both the chat object and the 'messages' attribute are
> >proxied automatically, right? The <require /> tags in configure.zcml
> >adds security declarations to the chat object, but not to the 'messages'
> >attribute. Am I correct this far?
> >
> >When I call self.context.messages.append(...) (in a browser page for
> >IChat) I get ForbiddenAttribute on append. I should get this, so this
> >is ok. But list or PersistentList has no interface I can use in IChat
> >instead of Attribute. So I tried using zope.schema.List instead, but
> >the interface of that was a small subset of what list provides and
> >doesn't have append either. So I don't know how to add these security
> >declarations to the 'messages' attribute.
> >
> >How can I use a list without getting security proxy problems? Do I have
> >to make my own list implementation and interface?
> >
> >Tim
> 
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