Use constants in succeeded events

Author: durran

lib/mongo/collection.rb

@@ -30,6 +30,11 @@ class Collection
     # @since 2.1.0
     CAPPED = 'capped'.freeze
 
+    # The ns field constant.
+    #
+    # @since 2.1.0
+    NS = 'ns'.freeze
+
     # @return [ Mongo::Database ] The database the collection resides in.
     attr_reader :database
 

lib/mongo/monitoring/event/command_succeeded.rb

@@ -98,11 +98,13 @@ def self.generate_reply(command_payload, reply_payload)
           if reply_payload
             reply = reply_payload[:reply]
             if cursor = reply[:cursor]
-              cursor.merge!('ns' => namespace(command_payload)) if !cursor.key?('ns')
+              if !cursor.key?(Collection::NS)
+                cursor.merge!(Collection::NS => namespace(command_payload))
+              end
             end
             reply
           else
-            BSON::Document.new(ok: 1)
+            BSON::Document.new(Operation::Result::OK => 1)
           end
         end