sample code for testing spatial indexes with mongoid

gistfile1.rb

class Geo
  include Mongoid::Document
  BERLIN_LOCATION = [52.51171, 13.44325]
  
  index({ 'location' => '2d' })
  field :location, type: Array  #0: latitude, 1: longitude

  scope :nearby, ->(location, distance) { where('location' => {'$within' => 
            { '$center' => [location, distance], '$uniqueDocs' => true }})}
  scope :berlin, -> {nearby(BERLIN_LOCATION, 2)}
end


require 'spec_helper'

describe Geo do
  it 'test geoindex' do
    geo = Geo.create!(location: [40.739257,  -74.03273999999999])
    Geo.berlin.to_a.should_not include geo
  end
end