gistfile1.rb

require 'mongo_mapper'
require 'spec'

MongoMapper.connection = Mongo::Connection.new('localhost')
MongoMapper.database = 'tmp'

class Book
  include MongoMapper::Document
  key :title, String
  key :_keywords, Array, :index => true
  before_save do |record|
    record._keywords = record.title.split(' ').uniq
  end
end

describe "testing text search" do
  before :each do
    Book.collection.clear
    book = Book.create :title => 'Something Wicked This Way Comes'
    book = Book.create :title => 'The Dragonriders of Pern'
    book = Book.create :title => "Starpilot's Grave"
    book = Book.create :title => "The Man Who Sold The Moon"
    book = Book.create :title => "The Man With The Golden Gun"
    puts "\n:_keywords => " + book._keywords.inspect
  end
  it "should allow combining search results" do
    a = Book.all(:conditions => {:_keywords => ['Man', 'Grave']})
    b = Book.all(:conditions => {:_keywords => 'The'})
    a.size.should == 3
    b.size.should == 3
    c = (a + b).uniq
    c.size.should == 4  # fails with result 6
  end
end