On Wednesday 29 May 2002 04:20 pm, Casey Duncan wrote:
> ob = r.getObject()
ob gets returned as None -- I think this is due to
AbstractCatalogBrain::getObject(). I don't believe self.aq_parent is set
correctly -- how is it supposed to be set ?
> or if that doesn't work:
> ob = catalog.getobject(r.data_record_id_)
AttributeError -- getobject doesnt exist?
> Bear in mind that getObject traverses to the object which is expensive both
> in time and memory if the number of results is large.
OK -- is there a better way to do all of this ? What I am trying to do is
have ZODB store objects and Catalog maintain indexes on them. Now I can come
back and do a 'SELECT' on the objects, say for variable != 1, and somehow get
access to the original objects if I wish to. Is there somewhere that
documents using Catalog and PluginIndexes without all of the other Zope
stuff? Any documents on using it with the Zope stuff ?
> On Wednesday 29 May 2002 04:05 pm, Nicholas Henke wrote:
> > Hello~~
> > I am playing with using the Catalog class in ZCatalog along with
> > to create a generic object layer on top of ZODB. I can index and search
> > til
> > am blue in the face, and I always get the correct answers. Now for the
> > problems...
> > Say I have the following obj:
> > class test(Persistent):
> > variable = 1
> > def function(self):
> > print self.__dict__
> > now if I do:
> > catalog = Catalog()
> > catalog.addIndex('variable', Fieldindex('variable'))
> > catalog.addColumn('variable')
> > obj = test()
> > catalog.catalogObject(obj, id(obj))
> > catalog_query = CatalogQuery(catalog, "variable==1")
> > results = catalog_query()
> > for r in results:
> > print r.variable # ok
> > print r.getRID() # ok
> > print r.function # NameError
> > ...so I can get an object (a mybrains instance )back that allows me to
> > print r.variable, but I cannot get r.function().
> > How does one do this? Is there a mapping between RIDs in the catalog and
> > objects somewhere? Do I need to do that mapping in an IOBtree (it would
> > make the most sense since I am using id(obj) as the uid in the catalog)?
> > Is there somewhere in Zope/google/web that does this?
> > Thanks for any help!!
> > Nic
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