Added skip_index option to the geocoded_by and reverse_geocoded_by

methods to avoid creating an index by default.

README.rdoc

@@ -83,6 +83,12 @@ Be sure to read <i>Latitude/Longitude Order</i> in the <i>Notes on MongoDB</i> s
 
 MongoMapper is very similar to Mongoid, just be sure to include <tt>Geocoder::Model::MongoMapper</tt>.
 
+=== MongoMapper, Mongoid Indexes
+
+By default the methods geocoded_by and reverse_geocoded_by will create a geospatial index. If you want to skip this option call the methids with the :skip_index option
+  include Geocoder::Model::Mongoid
+  geocoded_by :address, :skip_index => true
+
 === Bulk Geocoding
 
 If you have just added geocoding to an existing application with a lot of objects you can use this Rake task to geocode them all:

lib/geocoder/models/mongo_base.rb

@@ -16,7 +16,8 @@ module Geocoder
           :geocode       => true,
           :user_address  => address_attr,
           :coordinates   => options[:coordinates] || :coordinates,
-          :geocode_block => block
+          :geocode_block => block,
+          :skip_index    => options[:skip_index] || false
         )
       end
 
@@ -28,7 +29,8 @@ module Geocoder
           :reverse_geocode => true,
           :fetched_address => options[:address] || :address,
           :coordinates     => coordinates_attr,
-          :reverse_block   => block
+          :reverse_block   => block,
+          :skip_index      => options[:skip_index] || false
         )
       end
 

lib/geocoder/models/mongo_mapper.rb

@@ -16,8 +16,10 @@ module Geocoder
 
       def geocoder_init(options)
         super(options)
-        ensure_index [[ geocoder_options[:coordinates], Mongo::GEO2D ]],
-          :min => -180, :max => 180 # create 2d index
+        if options[:skip_index] == false
+          ensure_index [[ geocoder_options[:coordinates], Mongo::GEO2D ]],
+            :min => -180, :max => 180 # create 2d index
+        end
       end
     end
   end

lib/geocoder/models/mongoid.rb

@@ -16,8 +16,10 @@ module Geocoder
 
       def geocoder_init(options)
         super(options)
-        index [[ geocoder_options[:coordinates], Mongo::GEO2D ]],
-          :min => -180, :max => 180 # create 2d index
+        if options[:skip_index] == false
+          index [[ geocoder_options[:coordinates], Mongo::GEO2D ]],
+            :min => -180, :max => 180 # create 2d index
+        end
       end
     end
   end

test/mongoid_test.rb

@@ -19,4 +19,9 @@ class MongoidTest < Test::Unit::TestCase
     p = Place.near(location)
     assert_equal p.selector[:location]['$nearSphere'], location.reverse
   end
+
+  def test_index_is_skipped_if_skip_option_flag
+    result = PlaceWithoutIndex.index_options.keys.flatten[0] == :coordinates
+    assert_equal result, false
+  end
 end

test/mongoid_test_helper.rb

@@ -29,3 +29,11 @@ class Place
     write_attribute :address, address
   end
 end
+
+class PlaceWithoutIndex
+  include Mongoid::Document
+  include Geocoder::Model::Mongoid
+
+  field :location, :type => Array
+  geocoded_by :location, :skip_index => true
+end