Add support for Rails autoloading.

README.md

@@ -15,7 +15,9 @@ restpack_serializer allows you to quickly provide a set of RESTful endpoints for
 ## Getting Started
 
 ### For rails projects:
-After adding the gem `restpack_serializer` to your Gemfile, add this code to `config/initializers/restpack_serializer.rb`:
+Rails autoloading will automatically pull in top-level serializers. This means you no longer need to restart your server when changing serializers in development. If you previously had a restpack serializer initializer script, please remove it, as the two are not compatible.
+
+If your serializers or your model classes are nested in a module, you'll need to make sure you add this to your project in `config/initializers/restpack_serializer.rb`:
 
 ```ruby
 Dir[Rails.root.join('app/serializers/**/*.rb')].each do |path|

lib/restpack_serializer/factory.rb

@@ -9,7 +9,7 @@ def self.create(*identifiers)
   def self.classify(identifier)
     normalised_identifier = identifier.to_s.underscore
     [normalised_identifier, normalised_identifier.singularize].each do |format|
-      klass = RestPack::Serializer.class_map[format]
+      klass = RestPack::Serializer.class_for_identifier(format)
       return klass.new if klass
     end
 

lib/restpack_serializer/serializable.rb

@@ -13,7 +13,7 @@
 module RestPack
   module Serializer
     extend ActiveSupport::Concern
-    mattr_accessor :class_map
+
     @@class_map ||= {}
 
     included do
@@ -22,6 +22,16 @@ module Serializer
       @@class_map[identifier.split('/').last] = self
     end
 
+    def self.class_for_identifier(identifier)
+      klass = begin
+        "#{identifier}_serializer".camelize.constantize
+      rescue NameError => e
+        nil
+      end
+
+      klass ||= @@class_map[identifier]
+    end
+
     include RestPack::Serializer::Paging
     include RestPack::Serializer::Resource
     include RestPack::Serializer::Single