[Zope] define a class in a python script

[Yuri]

Andreas Jung wrote:
>
>
> --On 5. März 2008 10:21:32 +0100 Yuri <yurj at alfa.it> wrote:
>
>> Hi, all!
>>
>>  I would like to define a class inside a python script (so I can catalog
>> it and use catalog to store info, as the tutorial about catalog
>> everything suggests).
>>
>>
>
> This is basically bad-style. Define your class somewhere in your 
> product code and if necessary make it available through related APIs 
> of the AccessControl module.
>
> -aj
I've found this:

====

If you have a KeywordIndex for the attribute 'foo', then you need to
arrange that the reult objects in your recordset have sequences for the
column / atrribute 'foo'. E.g., for a query like:

select bar.id as 'bar, bar.name as 'name', foo.name as 'foo
from bar, foo where foo.bar_id = bar.id

you need to transform the result set:

bars = {}
for row in rows:
bar_id= row['bar']
bar = bars.get(bar_id)
if bar is None:
bar = bars[bar_id[ = {'bar': bar_id,
'name': row['name'],
'foo': [],
}
bar['foo'].append(row['foo'])

*Now* you can index the records you have transformed:

for bar in bars.values():
catalog.indexObject(compute_uid(bar), make_record(bar))

===

what are compute_uid(bar) and make_record(bar)?

btw, indexes "calls" the object I pass to indexObject or catalog_object, 
so I need an object with methods or a dictionary is enough? I'm testing 
it, but it is not...

====

def ret_autore(self):
 "ritorna un autore"

 return 'prova'

un_autore = {}
un_autore['aut']='prova'
#the index is called autore
un_autore.autore = ret_autore

context.catalogo_autori.catalog_object(un_autore, un_autore['aut'])

====

returns:

*Error Type: TypeError*
*Error Value: object has read-only attributes*