SOLR-171: Add per-doc and per-field boosts. (contributed by Coda Hale)

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@515436 13f79535-47bb-0310-9956-ffa450edef68

client/ruby/solr-ruby/lib/solr/document.rb

@@ -15,6 +15,7 @@ require 'solr/field'
 
 class Solr::Document
   include Enumerable
+  attr_accessor :boost
 
   # Create a new Solr::Document, optionally passing in a hash of 
   # key/value pairs for the fields
@@ -65,6 +66,7 @@ class Solr::Document
   # convert the Document to a REXML::Element 
   def to_xml
     e = Solr::XML::Element.new 'doc'
+    e.attributes['boost'] = @boost.to_s if @boost
     @fields.each {|f| e.add_element(f.to_xml)}
     return e
   end

client/ruby/solr-ruby/lib/solr/field.rb

@@ -14,13 +14,16 @@ require 'solr/xml'
 require 'time'
 
 class Solr::Field
+  VALID_PARAMS = [:boost]
   attr_accessor :name
   attr_accessor :value
+  attr_accessor :boost
 
-  def initialize(key_val, opts={})
-    raise "first argument must be a hash" unless key_val.kind_of? Hash
-    @name = key_val.keys[0].to_s
-    @value = key_val.values[0]
+  # Accepts an optional <tt>:boost</tt> parameter, used to boost the relevance of a particular field.
+  def initialize(params)
+    @boost = params[:boost]
+    name_key = (params.keys - VALID_PARAMS).first
+    @name, @value = name_key.to_s, params[name_key]
     # Convert any Time values into UTC/XML schema format (which Solr requires).
     @value = @value.respond_to?(:utc) ? @value.utc.xmlschema : @value.to_s
   end
@@ -28,6 +31,7 @@ class Solr::Field
   def to_xml
     e = Solr::XML::Element.new 'field'
     e.attributes['name'] = @name
+    e.attributes['boost'] = @boost.to_s if @boost
     e.text = @value
     return e
   end

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

@@ -56,4 +56,10 @@ class DocumentTest < Test::Unit::TestCase
     assert_equal 'Search', doc[:subject]
   end
   
+  def test_boost
+    doc = Solr::Document.new :name => "McGrump"
+    doc.boost = 300.28
+    assert_match(/<doc boost=['"]300.28['"]>[\s]+<field name=['"]name['"]>McGrump<\/field>[\s]+<\/doc>/, doc.to_xml.to_s)
+  end
+
 end

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

@@ -39,4 +39,10 @@ class FieldTest < Test::Unit::TestCase
     assert_match(/<field name=["']i18nstring["']>Äêâîôû Öëäïöü<\/field>/m, field.to_xml.to_s)
   end
   
+  def test_boost_values
+    field = Solr::Field.new(:blah => "squee", :boost => 3.0)
+    assert_kind_of Solr::XML::Element, field.to_xml
+    assert_match(/<field name=["']blah["'] boost=["']3.0["']>squee<\/field>/, field.to_xml.to_s)
+  end
+  
 end