Create index concurrency fix

lib/mongo/collection.rb

@@ -433,17 +433,18 @@ module Mongo
       }
       selector.merge!(opts)
 
-      insert_documents([selector], Mongo::DB::SYSTEM_INDEX_COLLECTION, false, false)
-      response = @db.get_last_error
+      begin
+      insert_documents([selector], Mongo::DB::SYSTEM_INDEX_COLLECTION, false, true)
 
-      if response['err']
-        if response['code'] == 11000 && selector[:dropDups]
+      rescue Mongo::OperationFailure => e
+        if selector[:dropDups] && e.message =~ /^11000/
           # NOP. If the user is intentionally dropping dups, we can ignore duplicate key errors.
         else
           raise Mongo::OperationFailure, "Failed to create index #{selector.inspect} with the following error: " +
-           "#{response['err']}"
+           "#{e.message}"
         end
       end
+
       name
     end
 

test/collection_test.rb

@@ -130,11 +130,6 @@ class TestCollection < Test::Unit::TestCase
     end
   end
 
-  def test_safe_responses
-    response = @@test.insert({:a => 1}, :safe => true)
-    assert_equal false, response
-  end
-
   def test_maximum_insert_size
     docs = []
     16.times do
@@ -721,6 +716,15 @@ class TestCollection < Test::Unit::TestCase
       @collection.create_index([['b', 1], ['a', 1]])
     end
 
+    should "allow multiple calls to create_index" do
+
+    end
+
+    should "allow creation of multiple indexes" do
+      assert @collection.create_index([['a', 1]])
+      assert @collection.create_index([['a', 1]])
+    end
+
     context "with an index created" do
       setup do
         @collection.create_index([['b', 1], ['a', 1]])

test/db_test.rb

@@ -175,10 +175,6 @@ class DBTest < Test::Unit::TestCase
     assert_nil @@db.previous_error
   end
 
-  def test_get_last_error_helper
-    p @@db.get_last_error
-  end
-
   def test_check_command_response
     command = {:forceerror => 1}
     assert_raise OperationFailure do