updated to rails 3.2, fixed tests

config/initializers/wrap_parameters.rb

@@ -4,9 +4,11 @@
 # is enabled by default.
 
 # Enable parameter wrapping for JSON. You can disable this by setting :format to an empty array.
-ActionController::Base.wrap_parameters :format => [:json]
+ActiveSupport.on_load(:action_controller) do
+  wrap_parameters format: [:json]
+end
 
 # Disable root element in JSON by default.
-if defined?(ActiveRecord)
-  ActiveRecord::Base.include_root_in_json = false
+ActiveSupport.on_load(:active_record) do
+  self.include_root_in_json = false
 end