solr = RSolr.connect

response = solr.select :params => {:q => '*:*', :facet => true, 'facet.field' => 'price'}
=> {"responseHeader"=>{"status"=>0, "QTime"=>2, "params"=>{"facet"=>"true", "facet.field"=>"price", "wt"=>"ruby", "q"=>"*:*"}}, "response"=>{"numFound"=>3, "start"=>0, "docs"=>[{"id"=>"1", "price"=>20.0}, {"id"=>"2", "price"=>40.0}, {"id"=>"3", "price"=>60.0}]}, "facet_counts"=>{"facet_queries"=>{}, "facet_fields"=>{"price"=>["20.0", 1, "40.0", 1, "60.0", 1]}, "facet_dates"=>{}, "facet_ranges"=>{}}}

response['facet_counts']['facet_fields']['price']
=> ["20.0", 1, "40.0", 1, "60.0", 1]
# Expected result: [{"20.0"=>1}, {"40.0"=>1}, {"60.0"=>1}]