Re: getting an object x in an external method that can be passed as context to ContentInit( ... ).initialize(context)

Suresh's answer sounds much better than my solution, that I give
below. Also, to answer Martin's post
The general idea is to have content types that are created according
to a ttw representation of a type of real object; a hotel, a room, a
town, a kitchen recipe, an ingredient, an artist, a painting. This is
managed by using ATSE on something like RichDocument. Then I want to
relate this content among them with Relations, and then I want to
categorize it with PloneTaxonomy.
What I did to get a context that can registerClass was to create a
plone tool from my initialize function in the root __init__.py of my
product, that has the context that is passed to initialize as an
attribute, and has a method that returns it. Then I get that tool in
my external method with getToolByName.


def initialize(context):
    ...
    class ContextoTool( UniqueObject, SimpleItem ):
        id = 'contexto_tool'
	meta_type = 'Contexto Tool'
	plone_tool = 1
        contexto = context
	def getContexto(self):
	   return self.contexto

    Products.Objeto.ContextoTool = ContextoTool
    InitializeClass(Products.Objeto.ContextoTool)

    utils.ToolInit(
        'Contexto Tool',
	tools = (ContextoTool,),
	product_name = 'Objeto',
	icon = 'tool.gif'
	).initialize(context)

This seems to work, though I guess it is clear by now that I am new to
plone, and to python for that matter. In any case, I have encountered
more problems.
This is what I have done so far:
In my Products I create two types, one folderish called "Almacen"
based on SchemaEditor and ATFolder and another "Objeto" wich is a copy
of Martin's RichDocument with the addition of atse stuff (atse_managed
for the fields of the schema, parentManagedSchema as base class for
Objeto. Almacen, in addition, has a field called "Contenido", the
mutator of which (hazContenido) triggers the creation of a new content
type, based on Objeto, with its schema managed by the almacen
instance.

the mutator:

    def hazContenido(self,Contenido):
        """ """
        if Contenido:
            clase = self.instalarContenido( Contenido)
            self.allowed_content_types = (Contenido,)
            self.atse_registerSchema(Contenido, getattr(clase, 'schema'))
        self.Contenido=Contenido

the external method instalarContenido is basically a copy of
RichDocument's install function with this prepended:

from Products.Objeto.content import objeto
Objeto = objeto.Objeto

def instalarContenido( self, Contenido  ):
    context = getToolByName(self,'portal_url').getPortalObject()
    contexto = getToolByName(self,'contexto_tool').getContexto()
    class_name=Contenido
    out = StringIO()
    typeinfo_name = 'Objeto: '+Contenido+ ' ('+Contenido+')'
    fti_meta_type = FactoryTypeInformation.meta_type
    portal_types=getToolByName(context,'portal_types')
    archTool=getToolByName(context,'archetype_tool')

    clase = type.__new__(type,Contenido,(Objeto,),{
           '__implements__':Objeto.__implements__,
           'id': Contenido,
           'portal_type': Contenido,
           'meta_type': Contenido,
           'archetype_name': Contenido,
           'product': PROJECTNAME,
           'typeDescription': 'Un '+Contenido,
           'typeDescMsgId': Contenido+'_description_edit',
           '_at_rename_after_creation': True,
           'schema':Objeto.schema.copy(),
           'actions':ATDocument.actions,
           'allowed_content_types':['Imagen', 'Documento'],
           'global_allow':1,
           'default_view':'objeto_view',
           'immediate_view':'objeto_view',
           'suppl_views':('objeto_view_preview', 'objeto_view_float'),
           'security':Objeto.security,

### These following attributes I had to add due to repeated errors I
write about below

	   '__module__': 'Products.Objeto.content.objeto',
           'portal_url': getToolByName(self, 'portal_url'),
           'mimetypes_registry': getToolByName(self, 'mimetypes_registry'),
           'portal_discussion': getToolByName(self, 'portal_discussion'),
           'allow_discussion': True,
           })

    objeto.__dict__[Contenido] = clase
    	
    def addCosa(self, id, **kwargs):
        o = clase(id)
        self._setObject(id, o)
        o = getattr(self, id)
        o.initializeArchetype(**kwargs)
        return id
    addCosa = function(addCosa.func_code,
                  addCosa.func_globals,
                  'add'+Contenido,
                  addCosa.func_defaults,
                  addCosa.func_closure,
    			  )
    objeto.__dict__['add'+Contenido] = addCosa
    	
    registerType(clase)

    arquetipo = getType(Contenido, PROJECTNAME)
    types = (arquetipo,)
    content_types, constructors, ftis = process_types(
        types,
        PROJECTNAME)

    utils.ContentInit(
        PROJECTNAME + ' Content',
        content_types      = content_types,
        permission         = DEFAULT_ADD_CONTENT_PERMISSION,
        extra_constructors = constructors,
        fti                = ftis,
        ).initialize(contexto)

    installTypes(context,out,types,PROJECTNAME)
    ...

and then the rest of the install function.
This goes well up to creating an Almacen and editing the schema of its
content. When I try to create new content, innumerable problems crop
up. AttributeError: 'module'. AttributeError: 'portal_url'.
AttributeError: 'mimetype_registry'. 'portal_discussion'. I have
"solved" those by giving attributes to my ghost Contenido type, the
ones that follow the comment. I know there has to be a better way, i
should delve deeper into the source, but I am working against the
time. The last error i am getting says:

------
2005-12-02T00:20:26 ERROR Archetypes Catched Unauthorized on
discussiontool.overrideDiscussionFor()
Traceback (most recent call last):
  File "/var/lib/zope/Products/Archetypes/ExtensibleMetadata.py", line
256, in allowDiscussion
    dtool.overrideDiscussionFor(self, allowDiscussion)
  File "/var/lib/zope/Products/CMFDefault/DiscussionTool.py", line 88,
in overrideDiscussionFor
    raise AccessControl_Unauthorized
Unauthorized: <AccessControl.unauthorized.Unauthorized instance at 0xb056f5ec>


I guess that I should be putting the newly created types somewhere
else, since they are not in the filesystem, but I am not sure where
and how.
Any pointers?

--
Enrique Pérez
[email protected]


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