Xapian discuss - Jul 2009 - Get Document Position in Search

Apologies if this has been asked before, but I couldn't find it with some
Googling.
Is there any way to determine the position of a given document in a search
result without fetching all records?

This would be useful for implementing a previous/next record functionality
in a website. I'm assuming this would be done through an Enquire since that
contains the query and sorting information. Here's an example of what
I'm
looking for.

position = enquire.position_of_document(some_doc)
previous = enquire.mset(position-1, 1)
next = enquire.mset(position+1, 1)

That is using Ruby bindings but any code sample will do. I'm mainly just
wondering if this functionality exists. If not, is there an alternative way
to fetch the previous/next document in a result set?

Thanks,

Ryan

On Thu, Jul 09, 2009 at 01:52:08PM -0700, Ryan Bates wrote:
> Is there any way to determine the position of a given document in a search
> result without fetching all records?
[snip]

I don't believe so; my response would probably be to implement a
caching layer in the session so you know where in the search results
you are, and can dip back out or move forward/backwards in the
document-as-search-result view. You could cache the salient parts of
the MSet (say 10 at a time) to avoid hitting the search service all
that often, although you may have to do a clever dance if the database
changes underneath you.

J

-- 
  James Aylett

  talktorex.co.uk - xapian.org - uncertaintydivision.org