Rails - Feb 2007 - Ferret search results breakdown

Hi, I''m building an application that is going to be making heavy use
of all the ferret search options, i.e. boolean, proximity, etc.  I was
wondering if ferret has a way of providing a full search report, for
example, for each document hit give the terms that were found in that
document and how many times each was hit.

Thanks!


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On 2/24/07, thomasvmatthew-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
<thomasvmatthew-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> Hi, I''m building an application that is going to be making heavy
use
> of all the ferret search options, i.e. boolean, proximity, etc.  I was
> wondering if ferret has a way of providing a full search report, for
> example, for each document hit give the terms that were found in that
> document and how many times each was hit.
>
> Thanks!
The Index#explain method is probably what you want;

http://ferret.davebalmain.com/api/classes/Ferret/Index/Index.html#M000038

Although the output may be a bit hard to understand. If you want to
create your own reports, here is an example;

  require ''rubygems''
  require ''ferret''

  class Ferret::I
    def report(query, doc_num)
      return '''' unless query = process_query(query)
      report = ''''
      term_vectors = reader.term_vectors(doc_num)
      query.terms(searcher).each do |term|
        term_vector = term_vectors[term.field].terms.select {|tp|
tp.text == term.text}
        count = term_vector.size > 0 ? term_vector.first.positions.size : 0
        report << "#{term.field}:#{term.text} - occured #{count}
times\n"
      end
      report
    end
  end

  i = Ferret::I.new(:analyzer => Ferret::Analysis::WhiteSpaceAnalyzer.new)

  i << {
    :one => """Hi, I''m building an application that
is going to be
making heavy use
  of all the ferret search options, i.e. boolean, proximity, etc.  I was
  wondering if ferret has a way of providing a full search report, for
  example, for each document hit give the terms that were found in that
  document and how many times each was hit.""",
    :two => """Where lipstick is concerned, the important
thing is not color,
  but to accept God''s final word on where your lips end. - Jerry
Seinfeld""",
    :three => """The forceps of our minds are clumsy forceps,
and crush the
  truth a little in taking hold of it. - HG Wells"""
  }

  puts "Explain => "
  puts i.explain(''the building all'', 0)
  puts ""
  puts "Report => "
  puts i.report(''the building all'', 0)

-- 
Dave Balmain
http://www.davebalmain.com/

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