Fixed index ordering

README.rdoc

@@ -355,6 +355,7 @@ Sean Cribbs, seancribbs on github
 
 Sunny Hirai
 * Suggested hashcode fix for Mongo::ObjectID
+* Noted index ordering bug.
 
 = License
 

lib/mongo/collection.rb

@@ -505,4 +505,5 @@ EOS
       indexes.join("_")
     end
   end
+
 end

lib/mongo/db.rb

@@ -422,7 +422,7 @@ module Mongo
       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'].to_a
+        info[index['name']] = index['key'].map
       }
       info
     end

lib/mongo/util/ordered_hash.rb

@@ -69,6 +69,7 @@ class OrderedHash < Hash
       @ordered_keys.each { |k| yield k, self[k] }
       self
     end
+    alias :each_pair :each
 
     def values
       collect { |k, v| v }

test/test_collection.rb

@@ -398,4 +398,27 @@ class TestCollection < Test::Unit::TestCase
       assert_equal 1, @collection.size
     end
   end
+
+  context "Creating indexes " do 
+    setup do 
+      @collection = @@db.collection('test-collection')
+    end
+
+    should "generate indexes in the proper order" do 
+      @collection.expects(:insert_documents) do |sel, coll, safe|
+        assert_equal 'b_1_a_1', sel[:name]
+      end
+      @collection.create_index([['b', 1], ['a', 1]])
+    end
+
+    context "with an index created" do 
+      setup do 
+        @collection.create_index([['b', 1], ['a', 1]])
+      end
+
+      should "return properly ordered index information" do 
+        assert_equal [['b', 1], ['a', 1]], @collection.index_information["b_1_a_1"]
+      end
+    end
+  end
 end