[Zope] Product initilization, acquisition and instance refere nces

[Jean-Francois.Doyon at CCRS.NRCan.gc.ca]

Dylan,

Most definitely ! Here's the relevant code:

from Globals import Persistent, DTMLFile, InitializeClass
from AccessControl.Role import RoleManager
from AccessControl import ClassSecurityInfo
from Acquisition import Implicit
from OFS import SimpleItem
from ogclib.WFS import GETQuery   <---  My python module

def addWFSGETQuery(self, id, connection, typename, title='',
propertyname='', featureversion='', maxfeatures='', featureid='', filter='',
bbox='', REQUEST=None):
        """ Add a WFS GET Query object """
        self._setObject( id, WFSGETQuery(id, connection, typename, title,
propertyname, featureversion, maxfeatures, featureid, filter, bbox ) )
        if REQUEST is not None:
 
REQUEST['RESPONSE'].redirect(self.absolute_url()+'/manage_main')

class WFSGETQuery( GETQuery, SimpleItem.Item, Persistent, Implicit,
RoleManager ):    <- The Zope wrapper for my module

        def __init__( self, id, connection, typename, title='',
propertyname='', featureversion='', maxfeatures='', featureid='', filter='',
bbox='' ):
                self.id = id
                self.edit( connection, typename, title, propertyname,
featureversion, maxfeatures, featureid, filter, bbox )

        security.declareProtected( 'Change Database Methods' , 'edit' )
        def edit(self, connection, typename, title='', propertyname='',
featureversion='', maxfeatures='', featureid='', filter='', bbox='' ):
                self.connection = connection
                self.typename = typename
                self.title = title
                self.propertyname = propertyname
                self.featureversion = featureversion
                self.maxfeatures = maxfeatures
                self.featureid = featureid
                self.filter = filter
                self.bbox = bbox
 
                self._cleanupparams()  <--- provided by GETQuery
 
                # Get feature type information and validate
 
                self._getfeaturetypeinfo()  <--- Provided by GETQuery


The problem is that outside of zope "connection" is an instance of another
class ("Connection") ... _getfeatureinfo() which is called by edit which is
called by __init__ needs that instance in order to do some work. But I can't
get that instance because getattr doesn't find it !! (Even though it is
there, in the same folder, available to be acquired)

The strange thing is that before I wrote the classes into python modules, I
had the whole thing as pure Zope products, and everythng was working fine.
then I split it into two in order to have the functionality as regular
Python modules, and when I come back into Zope, the same thing no longer
works ?

Thanks,
J.F.

-----Original Message-----
From: Dylan Reinhardt [mailto:zope at dylanreinhardt.com]
Sent: Wednesday, September 10, 2003 4:27 PM
To: Jean-Francois.Doyon at ccrs.nrcan.gc.ca
Cc: Zope Users
Subject: Re: [Zope] Product initilization, acquisition and instance
references


On Wed, 2003-09-10 at 12:49, Jean-Francois.Doyon at CCRS.NRCan.gc.ca wrote:
> The problem is the second one, which uses the first one.  First of all, it
> looks like while the class is being instanciated, there isn't any
> acquisition yet ? 

Did you use the Acquisition.Implicit mixin when you defined the class?


HTH,

Dylan