DelSolr - Solr Facets Made Easy in Ruby

delsolr - lightweight solr wrapper for ruby Here's an example of solr faceting made simple via delsolr:

c = DelSolr::Client.new(:server => 'solr1', :port => 8983)

# faceting by field...
rsp = c.query('dismax', :query => 'mp3 player',
                        :facets => [{:field => 'brand', :limit => 5, :mincount => 1}]

# now let's output the facet values and counts
rsp.facet_field_values('brand').each do |brand|
  puts "#{brand} - #{rsp.facet_field_count('brand', brand)}"
end

# faceting by query... with filtering...
rsp = c.query('dismax', :query => 'mp3 player',
                        :filters => {:onsale => true},
                        :facets => [{:query => "instock:true", :name => 'instock'},
                                    {:query => {:price => (0..50), :description => 'cool'}, :name => 'cool_and_cheap'}]) 

# now let's output some query facets
puts "Instock: #{rsp.facet_query_count_by_name('instock')}"
puts "Sweet: #{rsp.facet_query_count_by_name('cool_and_cheap')}"

We've been using this code internally for a bit, so we'd figure we'd open it up as a gem to see if other people find it useful. There are a number of other gems/plugins that do something similar, but we weren't satisfied with the balance of power and simplicity in any of them, particularly when it comes to faceting. The full documentation is available on the delsolr page