Added multiple field search example.

examples/multiple.rb

@@ -0,0 +1,38 @@
+$LOAD_PATH.unshift(File.expand_path('../../lib', __FILE__))
+require 'pp'
+require 'hunt'
+
+MongoMapper.database = 'testing'
+
+class Note
+  include MongoMapper::Document
+  plugin Hunt
+
+  key :title, String
+  key :tags,  Array
+
+  # Declare which fields to search on.
+  # No problem declaring an array key.
+  searches :title, :tags
+end
+Note.delete_all # clean the slate
+
+# Note that the search terms are stored in a searches hash in the key default.
+# This is so that future versions can allow different combinations of search
+# fields and use different keys in searches.
+
+# Also, meaningless words are stripped out and all words less than 3 characters
+# long. The words are then stemmed (http://en.wikipedia.org/wiki/Stemming) so
+# exact matches when searching are not necessary.
+
+pp Note.create(:title => 'I am lost without Mongo!', :tags => %w(mongo database nosql))
+#<Note searches: {"default"=>["test", "mongo", "databas", "nosql"]}, title: "This is a test", _id: BSON::ObjectId('...'), tags: ["mongo", "database", "nosql"]>
+
+pp Note.create(:title => 'Lost is a tv show', :tags => %w(lost tv))
+#<Note searches: {"default"=>["lost", "tv", "show"]}, title: "Lost is a tv show", _id: BSON::ObjectId('...'), tags: ["lost", "tv"]>
+
+pp Note.search('lost').count      # 2
+pp Note.search('tv').count        # 1
+
+# Multiple words work
+pp Note.search('mongo tv').count  # 2