demo/config/initializers/wrap_parameters.rb
# Be sure to restart your server when you modify this file.
# This file contains settings for ActionController::ParamsWrapper which
# is enabled by default.
# Enable parameter wrapping for JSON. You can disable this by setting :format to an empty array.
ActiveSupport.on_load(:action_controller) do
wrap_parameters format: [:json] if respond_to?(:wrap_parameters)
end
# To enable root element in JSON for ActiveRecord objects.
# ActiveSupport.on_load(:active_record) do
# self.include_root_in_json = true
# end