added indexing options: background, geo, dropDups, etc.

lib/mongo.rb

@@ -21,8 +21,9 @@ begin
 end
 
 module Mongo
-  ASCENDING = 1
+  ASCENDING  =  1
   DESCENDING = -1
+  GEO2D      = '2d'
 
   module Constants
     OP_REPLY        = 1

lib/mongo/collection.rb

@@ -318,14 +318,43 @@ module Mongo
     #
     # @param [String, Array] field_or_spec
     #   should be either a single field name or an array of
-    #   [field name, direction] pairs. Directions should be specified as Mongo::ASCENDING or Mongo::DESCENDING.
+    #   [field name, direction] pairs. Directions should be specified
+    #   as Mongo::ASCENDING, Mongo::DESCENDING, or Mongo::GEO2D.
     #
-    # @param [Boolean] unique if true, this index will enforce a uniqueness constraint.
+    #   Note that geospatial indexing only work in versions of MongoDB >= 1.3.3+. Keep in mind, too,
+    #   that in order to index a given field, that field must reference either an array or a sub-object
+    #   where the first two values represent x- and y-coordinates. Examples can be seen below.
+    #
+    # @param [Boolean] unique if true, this index will enforce a uniqueness constraint. DEPRECATED. Future
+    #   versions of this driver will specify the uniqueness constraint using a hash param.
+    #
+    # @option opts [Boolean] :unique (false) if true, this index will enforce a uniqueness constraint.
+    # @option opts [Boolean] :background (false) indicate that the index should be built in the background. This
+    #   feature is only available in MongoDB >= 1.3.2.
+    # @option opts [Boolean] :dropDups If creating a unique index on a collection with pre-existing records,
+    #   this option will keep the first document the database indexes and drop all subsequent with duplicate values.
+    # @option opts [Integer] :min specify the minimum longitude and latitude for a geo index.
+    # @option opts [Integer] :max specify the maximum longitude and latitude for a geo index.
+    #
+    # @example Creating a compound index:
+    #   @posts.create_index([['subject', Mongo::ASCENDING], ['created_at', Mongo::DESCENDING]])
+    #
+    # @example Creating a geospatial index:
+    #   @restaurants.create_index(['location', Mongo::GEO2D])
+    #
+    #   # Note that this will work only if 'location' represents x,y coordinates:
+    #   {'location': [0, 50]}
+    #   {'location': {'x' => 0, 'y' => 50}}
+    #   {'location': {'latitude' => 0, 'longitude' => 50}}
+    #
+    # @example A geospatial index with alternate longitude and latitude:
+    #   @restaurants.create_index(['location', Mongo::GEO2D], :min => 500, :max => 500)
     #
     # @return [String] the name of the index created.
     #
     # @core indexes create_index-instance_method
-    def create_index(field_or_spec, unique=false)
+    def create_index(field_or_spec, opts={})
+      opts.assert_valid_keys(:min, :max, :background, :unique, :dropDups) if opts.is_a?(Hash)
       field_h = OrderedHash.new
       if field_or_spec.is_a?(String) || field_or_spec.is_a?(Symbol)
         field_h[field_or_spec.to_s] = 1
@@ -333,15 +362,20 @@ module Mongo
         field_or_spec.each { |f| field_h[f[0].to_s] = f[1] }
       end
       name = generate_index_names(field_h)
+      if opts == true || opts == false
+        warn "If you're using Collection#create_index, the method for specifying a unique index has changed." +
+          "Please pass :unique => true to the method instead."
+      end
       sel  = {
         :name   => name,
         :ns     => "#{@db.name}.#{@name}",
         :key    => field_h,
-        :unique => unique }
+        :unique => (opts == true ? true : false) }
+      sel.merge!(opts) if opts.is_a?(Hash)
       begin
-        insert_documents([sel], Mongo::DB::SYSTEM_INDEX_COLLECTION, false, true)
+        response = insert_documents([sel], Mongo::DB::SYSTEM_INDEX_COLLECTION, false, true)
       rescue Mongo::OperationFailure
-        raise Mongo::OperationFailure, "Failed to create index #{sel.inspect}."
+        raise Mongo::OperationFailure, "Failed to create index #{sel.inspect}. Errors: #{response}"
       end
       name
     end

lib/mongo/db.rb

@@ -378,11 +378,11 @@ module Mongo
     # @return [Hash] keys are index names and the values are lists of [key, direction] pairs
     #   defining the index.
     def index_information(collection_name)
-      sel = {:ns => full_collection_name(collection_name)}
+      sel  = {:ns => full_collection_name(collection_name)}
       info = {}
-      Cursor.new(Collection.new(self, SYSTEM_INDEX_COLLECTION), :selector => sel).each { |index|
-        info[index['name']] = index['key'].map {|k| k}
-      }
+      Cursor.new(Collection.new(self, SYSTEM_INDEX_COLLECTION), :selector => sel).each do |index|
+        info[index['name']] = index
+      end
       info
     end
 

lib/mongo/util/core_ext.rb

@@ -24,3 +24,14 @@ class Object
   end
 
 end
+
+#:nodoc:
+class Hash
+
+  #:nodoc:
+  def assert_valid_keys(*valid_keys)
+    unknown_keys = keys - [valid_keys].flatten
+    raise(Mongo::MongoArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
+  end
+
+end

test/collection_test.rb

@@ -492,7 +492,30 @@ class TestCollection < Test::Unit::TestCase
 
   context "Creating indexes " do
     setup do
+      @@db.drop_collection('geo')
+      @@db.drop_collection('test-collection')
       @collection = @@db.collection('test-collection')
+      @geo        = @@db.collection('geo')
+    end
+
+    should "create a geospatial index" do
+      @geo.save({'loc' => [-100, 100]})
+      @geo.create_index([['loc', Mongo::GEO2D]])
+      assert @geo.index_information['loc_2d']
+    end
+
+    should "create a unique index" do
+      @collection.create_index([['a', Mongo::ASCENDING]], true)
+      assert @collection.index_information['a_1']['unique'] == true
+    end
+
+    should "create an index in the background" do
+      if @@version > '1.3.1'
+        @collection.create_index([['b', Mongo::ASCENDING]], :background => true)
+        assert @collection.index_information['b_1']['background'] == true
+      else
+        assert true
+      end
     end
 
     should "generate indexes in the proper order" do
@@ -508,7 +531,7 @@ class TestCollection < Test::Unit::TestCase
       end
 
       should "return properly ordered index information" do
-        assert_equal [['b', 1], ['a', 1]], @collection.index_information["b_1_a_1"]
+        assert @collection.index_information['b_1_a_1']
       end
     end
   end

test/db_api_test.rb

@@ -133,12 +133,6 @@ class DBAPITest < Test::Unit::TestCase
     assert_equal 2, docs.size
     assert docs.detect { |row| row['a'] == 1 }
     assert docs.detect { |row| row['a'] == 2 }
-
-    # Find by advanced query (regexp)
-    docs = @@coll.find('a' => /[1|2]/).to_a
-    assert_equal 2, docs.size
-    assert docs.detect { |row| row['a'] == 1 }
-    assert docs.detect { |row| row['a'] == 2 }
   end
 
   def test_find_sorting
@@ -287,7 +281,7 @@ class DBAPITest < Test::Unit::TestCase
     assert_equal 2, info.length
 
     assert info.has_key?(name)
-    assert_equal info[name], [["a", ASCENDING]]
+    assert_equal info[name]["key"], {"a" => 1}
   ensure
     @@db.drop_index(@@coll.name, name)
   end
@@ -302,7 +296,7 @@ class DBAPITest < Test::Unit::TestCase
     assert_equal 2, info.length
 
     assert info.has_key?(name)
-    assert_equal info[name], [["a", ASCENDING]]
+    assert_equal info[name]['key'], {"a" => 1}
   ensure
     @@db.drop_index(@@coll.name, name)
   end
@@ -314,7 +308,7 @@ class DBAPITest < Test::Unit::TestCase
 
     assert_equal name, 'a_-1_b_1_c_-1'
     assert info.has_key?(name)
-    assert_equal [['a', DESCENDING], ['b', ASCENDING], ['c', DESCENDING]], info[name]
+    assert_equal info[name]['key'], {"a" => -1, "b" => 1, "c" => -1}
   ensure
     @@db.drop_index(@@coll.name, name)
   end
@@ -326,7 +320,7 @@ class DBAPITest < Test::Unit::TestCase
 
     assert_equal name, 'a_-1_b_1_c_-1'
     assert info.has_key?(name)
-    assert_equal [['a', DESCENDING], ['b', ASCENDING], ['c', DESCENDING]], info[name]
+    assert_equal info[name]['key'], {"a" => -1, "b" => 1, "c" => -1}
   ensure
     @@db.drop_index(@@coll.name, name)
   end