Hello all I'm trying to do an application that handles it own ZODB database for storing large hierarcichal data. The abstractions and the db access are in external method and I use DTML for querying and receiving data to store. I have seen some examples like that about using ZODB from outside of Zope. I have integrated the database with a catalog to search inside it. Now I have a problem that have no idea how to fix it. Could add objects into a ZODB separate database, could add the catalog and the index, but when the database has one element, with every operation (inclusive opening it) this message appears from Zope: 'App.PersistentExtra' module has no attribute 'Autor'

From Python

File C:\Archivos de programa\Zope\lib\python\ZODB\Connection.py, line 534, in etstate File C:\Archivos de programa\Zope\lib\python\ZODB\Connection.py, line 178, in_persistent_load (Info: ('\x00\x00\x00\x00\x00\x00\x00\x0e', ('App.PersistentExtra', 'Autor'))) File C:\Archivos de programa\Zope\lib\python\ZODB\Connection.py, line 138, in __getitem__ (Info: ('\x00\x00\x00\x00\x00\x00\x00\x0e', '((U\x13App.PersistentExtraq\x01U\x05Autorq\x02tq\x03Nt.}q\x04(U\x02idq\x05U\x0822596451q\x06U\x04nameq\x07U\x0f Juana Silviaq\x08U\robservacionesq\tU\x0bpruebaq\nu.')) File C:\Archivos de programa\Zope\lib\python\ZODB\DB.py, line 122, in _classFa ctory AttributeError: 'App.PersistentExtra' module has no attribute 'Autor' Simply, I have no idea what is happening, have searched over App.PersistentExtra but...what is???? Somebody knows where could I find an example (that works and is updated) for doing this kind of tasks? My code is: ----------------------------- import sys import ZODB import Persistence from Persistence import Persistent from ZODB.FileStorage import FileStorage from Products.ZCatalog.Catalog import Catalog from Products.PluginIndexes.FieldIndex.FieldIndex import FieldIndex class Autor(Persistent): id='' name='' observaciones='' def __init__(self,id,nombre,comments): self.name = nombre self.id = id self.observaciones = comments def setName(self,nombre): self.name = nombre def setId(self,id): self.id = id def setObs(self,comments): self.observaciones = comments def getName(self): return self.name def getId(self): return self.id class Autores: def __init__( self, file='dcAuthor.fs' ): self.file= file self.db = ZODB.DB( FileStorage( file ) ) self.co = self.db.open() self.root= self.co.root() if self.root.has_key( 'cat' ): self.cat= self.root['cat'] else: self.cat = Catalog() ### This is, how I get it to work self.cat.aq_parent= self.root self.root['cat']= self.cat ### Add indexes to the Catalog-Class ### The names must match the fields of the Person-Class! indice = FieldIndex('id') self.cat.addIndex('id',indice ) otroIndice = FieldIndex('name') self.cat.addIndex('name' ,otroIndice ) ### self.cat.addIndex('observaciones','FieldIndex' ) get_transaction().commit() def setAutor( self, autor ): uid= id( autor ) self.root[uid]= autor print "Guardada como:"+str(uid) ### Let the Catalog know from this object self.cat.catalogObject( autor, uid ) get_transaction().commit() def searchAutor( self, **kw ): r= self.cat.searchResults( kw ) paths= self.cat.paths root = self.root k= [] for i in r: id= i.data_record_id_ k.append( root[paths[id]] ) return k def close ( self ): self.db.close() def AddAutor(nombre,documento,obs): autor = Autor(documento,nombre,obs) autores = Autores() autores.setAutor(autor) autores.close() def GetAutor(expresion): autores = Autores() listaAutores=autores.searchAutor(name=expresion) autores.close() listaretorno=[] for au in listaAutores: listaretorno.append(au.getName()) return listaretorno ---------------------------------------- I've seen that if I no close() the database, only obtain Error 500 from the server. GetAutor and AddAutor are called from DTML. Well, thanks a lot. Emiliano.