Add app/decorators in the host Rails application to Rails autoload paths. Describe the reasoning behind each hook/callback. -- Issue #32

lib/draper/railtie.rb

@@ -3,10 +3,28 @@ require 'rails/railtie'
 module Draper
   class Railtie < Rails::Railtie
 
+    ##
+    # Decorators are loaded in
+    # => at app boot in non-development environments
+    # => after each request in the development environment
+    #
+    # This is necessary because we might never explicitly reference
+    # Decorator constants.
+    #
     config.to_prepare do
       ::Draper::System.load_app_local_decorators
     end
 
+    ##
+    # The `app/decorators` path is eager loaded
+    #
+    # This is the standard "Rails Way" to add paths from which constants
+    # can be loaded.
+    #
+    config.before_initialize do |app|
+      app.config.paths.add 'app/decorators', :eager_load => true
+    end
+
     initializer "draper.extend_action_controller_base" do |app|
       ActiveSupport.on_load(:action_controller) do
         Draper::System.setup(:action_controller)