Boosting fields -- what are good strategies?

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mwl...@cybrains.net

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Nov 2, 2015, 1:37:01 PM11/2/15
to Sunspot
I'm working on initial configuration of Sunspot under Rails 4.x.  All is working well and we're experimenting to fine-tune results.  We're indexing books for an online bookstore.  I have the following searchable defined:

  searchable do
    text :full_title
    text :ean

    text :publisher_name
    time :publication_date
    text :imprint_name
    double  :popularity
double
:avg_rating
    boolean :is_featured

    text :author_names do
      authors.map{ |author| author.full_name }
    end
  end

I want "is_featured" items that match at the very top (page 1) then I want matches on titles to come before matches on publisher and author names.  Within that, I wanted to order by popularity, then avg_rating.  At the moment, I am trying this, but it doesn't seem right to me:

Item.search do
  fulltext "pizza" do
    boost_fields :full_title => 2.0
    boost(3.0) { with(:is_featured, true) }
    order_by(:score, :desc)
    order_by(:polularity, :desc)
    order_by(:avg_rating, :desc)
  end
end


One other question...how does one decide on the boost factor?  2.0, 3.0, 5.0, etc.?  Is this entirely an experimentation process to fine-tune?  or is there a methodological way to figure out what I would want the boost factors to be?

Thanks,

Michael
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