Xapian discuss - Sep 2005 - Python binding and Xapian fields

Hi all, 

I have spent more than 3 hours trying to figure out how Xapian documents 
fields works ! It seems that I failed so I ask for help.

I am using Xapian 0.9.2 with Python bindings and Xapwrap (Python wrapper for 
xapian) on Fedora Core 3. I have added custom fields like 'uri',
'title',
etc and I wish to view them in my Omega results.
I am also using an Omega XML customized XML template with these fields. 
Searching with Xapian and Omega works great ... but those fields appears as 
empty in my resultset! I can not make it work, whether using Index or 
SmartIndex from Xapwrap.

What did I miss ? How Omega fields are considered regarding Xapian documents 
textfields/sortkeys/keywords ?
I have tried to add my fields as textfields, sortkeys and keyworks, but 
nothing works.

That's enough for today I think. :-)

Thanks in advance
David LEVY
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On Wed, Sep 14, 2005 at 11:55:39PM +0200, David Levy
wrote:
> I am using Xapian 0.9.2 with Python bindings and Xapwrap (Python wrapper
for
> xapian) on Fedora Core 3. I have added custom fields like 'uri',
'title',
> etc and I wish to view them in my Omega results.
Xapwrap is a third party wrapper around Xapian's python bindings.  I've
not studied it in great detail, but I think the author reads this list.
> I am also using an Omega XML customized XML template with these fields. 
> Searching with Xapian and Omega works great ... but those fields appears as
> empty in my resultset! I can not make it work, whether using Index or 
> SmartIndex from Xapwrap.
> 
> What did I miss ? How Omega fields are considered regarding Xapian
documents
> textfields/sortkeys/keywords ?
Xapian allows you to attach a chunk of data to each document (called the
document data!) which it treats as opaque.  It's up to you how you use
this - you could use it to store XML, or a packed binary format, or
an ID for an RDBMS or whatever you like.

Omega uses it to store NAME=VALUE pairs, one per line.  So $field{foo}
looks for a line foo=<value> in the document data and returns
<value>.
> I have tried to add my fields as textfields, sortkeys and keyworks, but 
> nothing works.
My guess would be that Xapwrap stores fields in a different way to
Omega, so Omega doesn't find a matching line.

Cheers,
    Olly