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From "Pieter Berkel" <pieter.ber...@gmail.com>
Subject Re: MoreLikeThis handler and field collapsing.
Date Tue, 31 Jul 2007 11:02:28 GMT
What exactly are you trying to achieve by using the MoreLikeThis handler?  I
created a patch that adds MoreLikeThis functionality (available in the
Standard request handler) to the Dismax handler in
http://issues.apache.org/jira/browse/SOLR-295
<https://issues.apache.org/jira/browse/SOLR-295> which may be of interest
(although unfortunately not quite the same as what you requested).

As far as I'm aware, there is no real need for MoreLikeThis to be a
standalone request handler in its own right (and to be honest the current
implemetation feels a bit clumsy), rather it should be incorporated as a
"plugin" or search component in the Standard and Dismax handlers (like the
way Facets, Highlighting and Collapsing currently are implemented), which is
what Ryan is trying to achieve with SOLR-281.  I'm hoping the "search
component" idea will gain traction and support soon as I'd really like so
see the Dismax request handler support MoreLikeThis functionality soon! (but
I digress...)

cheers,
Piete



On 31/07/07, Nuno Leitao <nuno@scaletrix.com> wrote:
>
> I will take a stab at patching the MoreLikeThis handler - but given
> that I have never touched a single line of Solr code this might fail
> miserably :)
>
> Maybe there is a kind soul which could provide a new patch for
> SOLR-236 which includes field collapse with MLT ?
>
> On 30/07/07, Ryan McKinley <ryantxu@gmail.com> wrote:
> > Nuno Leitao wrote:
> > > Hi,
> > >
> > > I have a 1.3 Solr with the field collapsing patch (SOLR-236 -
> > > http://issues.apache.org/jira/browse/SOLR-236).
> > >
> > > Collapsing works great, but only using the dismax and standard query
> > > handler - I haven't managed to get it to work using the MoreLikeThis
> > > handler though - I am going for a simplistic approach where I just run
> a
> > > query such as:
> > >
> > > /mlt?start=0&rows=3&collapse.field=collapsefield&collapse.type=normal
> > >
> > > Looking at the SOLR-236 patch it seems the field collapsing has only
> > > been patched into the StandardRequestHandler and the
> > > DisMaxRequestHandler, which would explain why this fails to work
> > > completely, but perhaps someone has found another way ?
> > >
> >
> > I have not tried, but field collapsing should be able to work with the
> > MoreLikeThis handler -- but it is not part of the patch.
> >
> > Given that we keep trying to add more widgets to the search chain, there
> > has been talk of "search component" based handler that can easily share
> > this sort of functionality.
> >
> > check:
> > https://issues.apache.org/jira/browse/SOLR-281
> >
> http://www.nabble.com/search-components-%28plugins%29-tf3898040.html#a11050274
> >
> > SOLR-281 is now just a quick/dirty brainstorm, but I think it is the
> > likely direction for how field collapsing will be integrated.
> >
> > In short, if you need something to work quickly: apply the same pattern
> > from DisMax and Standard to the MoreLikeThis handler.  If you have more
> > time (and interest) it would be great to add these features to SOLR-281.
>
> >
> >
> > ryan
> >
> >
> >
>

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