[Zope3-dev] Re: expected string or Unicode object

[Jürgen Kartnaller]

How should ZODB know how to serialize your xmpp.Client and /or 
xmpp.protocol.JID ?

If connectOnStartup is True your code creates these objects.

Jürgen

Florian Lindner wrote:
> Hello,
> everytime I add my utility I get:
> 
> 2006-12-04T22:44:26 ERROR SiteError 
> http://horus.local:8080/++etc++site/default/+/AddJabberClient.html%3D
> Traceback (most recent call last):
>   File "/home/florian/Zope3/src/zope/publisher/publish.py", line 138, in 
> publish
>     publication.afterCall(request, obj)
>   File "/home/florian/Zope3/src/zope/app/publication/browser.py", line 78, in 
> afterCall
>     super(BrowserPublication, self).afterCall(request, ob)
>   File "/home/florian/Zope3/src/zope/app/publication/zopepublication.py", line 
> 167, in afterCall
>     txn.commit()
>   File "/home/florian/Zope3/src/transaction/_transaction.py", line 395, in 
> commit
>     self._commitResources()
>   File "/home/florian/Zope3/src/transaction/_transaction.py", line 495, in 
> _commitResources
>     rm.commit(self)
>   File "/home/florian/Zope3/src/ZODB/Connection.py", line 498, in commit
>     self._commit(transaction)
>   File "/home/florian/Zope3/src/ZODB/Connection.py", line 543, in _commit
>     self._store_objects(ObjectWriter(obj), transaction)
>   File "/home/florian/Zope3/src/ZODB/Connection.py", line 570, in 
> _store_objects
>     p = writer.serialize(obj)  # This calls __getstate__ of obj
>   File "/home/florian/Zope3/src/ZODB/serialize.py", line 407, in serialize
>     return self._dump(meta, obj.__getstate__())
>   File "/home/florian/Zope3/src/ZODB/serialize.py", line 416, in _dump
>     self._p.dump(state)
> TypeError: expected string or Unicode object, NoneType found
> 127.0.0.1 - - [4/Dec/2006:22:44:26 
> +0200] "POST /++etc++site/default/+/AddJabberClient.html%3D HTTP/1.1" 500 
> 89 "http://horus.local:8080/++etc++site/default/+/AddJabberClient.html=" "Mozilla/5.0 
> (compatible; Konqueror/3.5; Linux) KHTML/3.5.5 (like Gecko)"
> 
> I have already tried on zope3-users but got no solution. This is my code:
> 
> interfaces.py:
> 
> from zope.interface import Interface
> from zope.schema import TextLine, Password, Bool
> 
> class IJabberClient(Interface):
>     JID = TextLine(
>                         title = u"Jabber ID",
>                         description = u"Jabber ID (user at example.com). You need 
> to reconnect in order to take effect.",
>                         required = True )
>                         
>     password = Password(
>                         title = u"Password",
>                         description = u"Password for the jabber account",
>                         required = True )
>     
>     connectOnStartup = Bool(
>                         title = u"Connect on startup",
>                         description = u"Automatically connect when Zope starts 
> and also when the object is newly added (what you are about to do).",
>                         default = True)
> 
> jabberclient.py:
> 
> from interfaces import IJabberClient
> from zope.interface import implements
> 
> from persistent import Persistent
> from zope.app.container.contained import Contained
> 
> import xmpp
> 
> class JabberClient(Persistent, Contained):
>     implements(IJabberClient)
>     
>     JID = u""
>     password = u""
>     connectOnStartup = True
>     
>     status = u"offline"
> 
>     
>     def finishInitialization(self):
>         """ Finish the rest of the initialziation that can't be done in 
> __init__. """
>         if self.connectOnStartup:
>             self.setStatus("available")
>         else:
>             self.setStatus("offline")
> 
>     
>     def setStatus(self, newStatus):
>         if self.status == "offline" and newStatus == "available":
>             self.jabberID = xmpp.protocol.JID(self.JID)
>             self.client = xmpp.Client(self.jabberID.getDomain(), debug=[])
>             self.client.connect()
>             self.client.auth(self.jabberID.getNode(), self.password)
>             self.client.sendPresence(self.jabberID)
>             
>         if self.status == "available" and newStatus == "offline":
>             # disconnect
>             pass
>             
>         self.status = newStatus
>         
>     def getStatus(self):
>         return self.status
>     
>           
> def onObjectAdded(event):
>     if IJabberClient.providedBy(event.object):
>         event.object.finishInitialization()
> 
> 
> configure.zcml
> 
> <configure xmlns="http://namespaces.zope.org/zope" 
> xmlns:browser="http://namespaces.zope.org/browser">
> 
>     <class class=".jabberclient.JabberClient">
> 
>         <require
>             permission="zope.ManageServices"
>             interface=".interfaces.IJabberClient"
>             set_schema=".interfaces.IJabberClient" />
> 
>     </class>
> 
>     <browser:addform
>         schema=".interfaces.IJabberClient"
>         label="Add a JabberClient object"
>         content_factory=".jabberclient.JabberClient"
>         name="AddJabberClient.html"
>         permission="zope.ManageServices"
>         set_before_add="JID password connectOnStartup" />
> 
>     <browser:addMenuItem
>         title="Jabber Client" 
>         class=".jabberclient.JabberClient"
>         permission="zope.ManageServices"
>         view="AddJabberClient.html" />
> 
>     <browser:editform
>         schema=".interfaces.IJabberClient"
>         label="Edit the JabberClient"
>         name="edit.html"
>         permission="zope.ManageServices"
>         menu="zmi_views" title="Edit" />
> 
>     <subscriber
>         for="zope.app.container.interfaces.IObjectAddedEvent"
>         handler=".jabberclient.onObjectAdded"
>     />
> 
> </configure>
> 
> 
> Sorry for the huge posting but I got no idea where the error comes from. The 
> error occurs only when connectOnStartup is True.
> 
> Thanks for any help,
> 
> Florian