Fix issue where only facet.query was being requested but no fields

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@537760 13f79535-47bb-0310-9956-ffa450edef68

client/ruby/solr-ruby/lib/solr/request/standard.rb

@@ -71,6 +71,7 @@ class Solr::Request::Standard < Solr::Request::Select
       hash["facet.missing"] = @params[:facets][:missing]
       hash["facet.mincount"] = @params[:facets][:mincount]
       hash["facet.prefix"] = @params[:facets][:prefix]
+      if @params[:facets][:fields]  # facet fields are optional (could be facet.query only)
         @params[:facets][:fields].each do |f|
           if f.kind_of? Hash
             key = f.keys[0]
@@ -86,6 +87,7 @@ class Solr::Request::Standard < Solr::Request::Select
           end
         end
       end
+    end
     
     # highlighting parameter processing - http://wiki.apache.org/solr/HighlightingParameters
     #TODO need to add per-field overriding to snippets, fragsize, requiredFieldMatch, formatting, and simple.pre/post

client/ruby/solr-ruby/test/unit/standard_request_test.rb

@@ -55,6 +55,17 @@ class StandardRequestTest < Test::Unit::TestCase
     assert_match /debugQuery/, request.to_s
   end
   
+  def test_only_facet_query
+    request = Solr::Request::Standard.new(:query => 'query',
+       :facets => {
+         :queries => ["q1", "q2"],
+        }
+    )
+    
+    hash = request.to_hash
+    assert_equal ["q1", "q2"], hash["facet.query"]
+  end
+  
   def test_facet_params_all
     request = Solr::Request::Standard.new(:query => 'query',
        :facets => {