[Zope3-dev] Principal with annotations

[Florian Lindner]

Stephan Richter schrieb:

>On Friday 24 September 2004 11:09, Florian Lindner wrote:
>  
>
>>This chapter is pretty new, isn't it? When I worked through the Zope3
>>book some months ago I didn't noticed such a chapter.
>>    
>>
> <>
> Yes, it was suggested by Kapil and I added it just before turning in 
> the book
> to the publisher.


Ok, I've used you're example, but when I try to save a entry in the 
email field (in User Info) of a new principal:

  File "C:\Python23\Lib\site-packages\zope\app\form\browser\widget.py", 
line 31
, in applyChanges
    field.set(content, value)
  File "C:\Python23\Lib\site-packages\zope\schema\_bootstrapfields.py", 
line 18
, in set
    setattr(object, self.__name__, value)
  File "C:\zope\lib\python\CSUser\info.py", line 27, in __setattr__
    self.info[name] = value
  File "C:\zope\lib\python\CSUser\info.py", line 23, in __getattr__
    raise AttributeError, "'%s' not in interface." %name
AttributeError: 'info' not in interface.

127.0.0.1 - zope.manager [25/Sep/2004:20:58:10 +0400] "POST 
/++etc++site/defaul
/AuthenticationService/PrincipalSource/anmeldung/@@userInfo.html 
HTTP/1.1" 200
92 
"http://localhost:8080/++etc++site/default/AuthenticationService/PrincipalSo
rce/anmeldung/@@userInfo.html" "Mozilla/5.0 (Windows; U; Windows NT 5.1; 
de-DE;
rv:1.7) Gecko/20040803 Firefox/0.9.3"

127.0.0.1 - zope.manager [25/Sep/2004:20:58:11 +0400] "GET 
/++etc++site/default
AuthenticationService/PrincipalSource/anmeldung/@@singleBranchTree.xml 
HTTP/1.1
 200 1066 "" "Mozilla/5.0 (Windows; U; Windows NT 5.1; de-DE; rv:1.7) 
Gecko/200
0803 Firefox/0.9.3"

This is my interfaces.py:


from zope.i18n import MessageIDFactory
from zope.interface import Interface
from zope.schema import TextLine

_ = MessageIDFactory('principalinfo')


class IPrincipalInformation(Interface):
    """This interface stores additional information about a principal."""

    email = TextLine(
        title=_("E-mail"),
        description=_("E-mail Address"),
        # default=u"",
        required=True)


My info.py:

from persistent.dict import PersistentDict
from zope.interface import implements
from zope.app import zapi

from interfaces import IPrincipalInformation

key = 'CSUser'

class PrincipalInformation(object):
    r"""Principal Information Adapter"""
    implements(IPrincipalInformation)

    def __init__(self, principal):
        annotationsvc = zapi.getService('PrincipalAnnotation')
        annotations = annotationsvc.getAnnotations(principal)
        if annotations.get(key) is None:
            annotations[key] = PersistentDict()
            self.info = annotations[key]

    def __getattr__(self, name):
        if name in IPrincipalInformation:
            return self.info.get(name, None)
        raise AttributeError, "'%s' not in interface." %name

    def __setattr__(self, name, value):
        if name in IPrincipalInformation:
            self.info[name] = value
        else:
            super(PrincipalInformation, self).__setattr__(name, value)



What is wrong there?
One more question: Is it possible to create a new type of principal but 
not to modify the existing one?

Thx,
Florian