app/controllers/uploader/attachments_controller.rb in rails-uploader-0.4.3 vs app/controllers/uploader/attachments_controller.rb in rails-uploader-0.4.4

@@ -44,10 +44,10 @@
 
     protected
 
     def find_klass
       @klass = Uploader.constantize(params[:klass])
-      raise ActionController::RoutingError, "Class not found #{params[:klass]}" if @klass.nil?
+      raise ActionController::ParameterMissing.new("klass parameter isn't set but #{params[:klass].inspect}") if @klass.nil?
     end
 
     def build_asset
       @asset = @klass.new(asset_params)
     end