Ferret talk - Jun 2007 - more specific queries via IndexReader

We would like to show a list of "most recently added terms", meaning,
the results of this query:

Resource.aaf_index.ferret_index.reader.terms(:summary)

BUT, only returning terms from a certain set of documents (in our  
case, we are going to filter by creation data).

Is this possible?

Thanks,
John

On Jun 16, 2007, at 2:59 PM, John Bachir wrote:
> We would like to show a list of "most recently added terms",
meaning,
> the results of this query:
>
> Resource.aaf_index.ferret_index.reader.terms(:summary)
>
> BUT, only returning terms from a certain set of documents (in our
> case, we are going to filter by creation data).
>
> Is this possible?
>
Actually I just discovered that when using the drb server, the  
ferret_index cannot be accessed. So I imagine it is impossible to  
access the index''s terms at all?

John

On Sat, Jun 16, 2007 at 03:20:27PM -0400, John Bachir
wrote:
> 
> On Jun 16, 2007, at 2:59 PM, John Bachir wrote:
> 
> > We would like to show a list of "most recently added terms",
meaning,
> > the results of this query:
> >
> > Resource.aaf_index.ferret_index.reader.terms(:summary)
> >
> > BUT, only returning terms from a certain set of documents (in our
> > case, we are going to filter by creation data).
> >
> > Is this possible?
> >
> 
> Actually I just discovered that when using the drb server, the  
> ferret_index cannot be accessed. So I imagine it is impossible to  
> access the index''s terms at all?
Yeah, the DRb server is not exposing the ferret index to the outside.
You can however extend aaf''s LocalIndex class (where ferret_index is 
available) with a custom terms method and call that via DRb (aaf_index
is an instance of LocalIndex in local and of RemoteIndex in DRb mode,
but RemoteIndex routes all calls via method_missing through to the 
remote LocalIndex instance).

Just be sure to not pull complex Ferret objects (like IndexReaders)
across the DRb connection.

regarding the original problem - I''m not sure but would guess you
can''t
filter the terms result to only include terms from some documents.

Jens

-- 
Jens Kr?mer
webit! Gesellschaft f?r neue Medien mbH
Schnorrstra?e 76 | 01069 Dresden
Telefon +49 351 46766-0 | Telefax +49 351 46766-66
kraemer at webit.de | www.webit.de
 
Amtsgericht Dresden | HRB 15422
GF Sven Haubold, Hagen Malessa