The random sort field in solr 1.3 relies on the field name and dynamic
fields for ordering. Check the example solrconfig.xml in 1.3
<dynamicField name="random*" type="random" />
to get random results, try various field names:
&sort=rand_123 asc
&sort=rand_xyz asc
&sort=rand_{generate your random number on the client} asc
This is good because you will get the same results for the same query
string, and will get a new set of random results for a new URL.
ryan
On Jul 7, 2008, at 1:40 PM, Sean Laval wrote:
The RandomSortField in 1.3.... each time you then issue a query, you
get the same random sort order right? That is to say the randomness
is implemented at index time rather than search time?
Thanks,
--------------------------------------------------
From: "Yonik Seeley" <[EMAIL PROTECTED]>
Sent: Monday, July 07, 2008 6:22 PM
To: <solr-user@lucene.apache.org>
Subject: Re: implementing a random result request handler - solr 1.2
If it's just a random ordering you are looking for, it's implemented
in the latest Solr 1.3
Solr 1.3 should be out soon, so if you are just starting development,
I'd start with the latest Solr version.
If you really need to stick with 1.2 (even after 1.3 is out?) then
RandomSortField should be easy to backport to 1.2
-Yonik
On Mon, Jul 7, 2008 at 1:15 PM, Sean Laval <[EMAIL PROTECTED]>
wrote:
Well its simply a business requirement from my perspective. I am
not sure I
can say more than that. I could maybe implement a request handler
that did
an initial search to work out how many hits there are resulting
from the
query and then did as many more queries as were required fetching
just 1
document starting at a given random number .. would that work?
Sounds a bit
cludgy to me even as I say it.
Sean
--------------------------------------------------
From: "Walter Underwood" <[EMAIL PROTECTED]>
Sent: Monday, July 07, 2008 5:06 PM
To: <solr-user@lucene.apache.org>
Subject: Re: implementing a random result request handler - solr 1.2
Why do you want random hits? If we know more about the bigger
problem, we can probably make better suggestions.
Fundamentally, Lucene is designed to quickly return the best
hits for a query. Returning random hits from the entire
matched set is likely to be very slow. It just isn't what
Lucene is designed to do.
wunder
On 7/7/08 8:58 AM, "Sean Laval" <[EMAIL PROTECTED]> wrote:
I have seen various posts about implementing random sorting
relating to
the
1.3 code base but I am trying to do this in 1.2. Does anyone
have any
suggestions? The approach I have considered is to implement my own
request
handler that picks random documents from a larger result list. I
therefore
need to be able to create a DocList and add documents to it but
can't
seem to
do this. Does anyone have any advice they could offer please?
Regards,
Sean
