Directly extend ActionController with class methods

Author: smaximov

lib/jsonapi/rails/action_controller.rb

@@ -6,11 +6,6 @@ module Rails
     module ActionController
       REVERSE_MAPPING_KEY = 'jsonapi_deserializable.reverse_mapping'.freeze
 
-      def self.prepended(base)
-        base.class_eval do
-          extend ClassMethods
-        end
-      end
       module ClassMethods
         def deserializable_resource(key, options = {}, &block)
           _deserializable(key, options,

lib/jsonapi/rails/railtie.rb

@@ -18,7 +18,7 @@ class Railtie < ::Rails::Railtie
       initializer 'jsonapi-rails.action_controller' do
         ActiveSupport.on_load(:action_controller) do
           require 'jsonapi/rails/action_controller'
-          prepend ::JSONAPI::Rails::ActionController
+          extend ::JSONAPI::Rails::ActionController::ClassMethods
 
           Mime::Type.register MEDIA_TYPE, :jsonapi