1 files changed, 51 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/metal/serialization.rb b/actionpack/lib/action_controller/metal/serialization.rb
new file mode 100644
index 0000000000..628d5996d7
--- /dev/null
+++ b/actionpack/lib/action_controller/metal/serialization.rb
@@ -0,0 +1,51 @@
+module ActionController
+  # Action Controller Serialization
+  #
+  # Overrides render :json to check if the given object implements +active_model_serializer+
+  # as a method. If so, use the returned serializer instead of calling +to_json+ in the object.
+  #
+  # This module also provides a serialization_scope method that allows you to configure the
+  # +serialization_scope+ of the serializer. Most apps will likely set the +serialization_scope+
+  # to the current user:
+  #
+  #    class ApplicationController < ActionController::Base
+  #      serialization_scope :current_user
+  #    end
+  #
+  # If you need more complex scope rules, you can simply override the serialization_scope:
+  #
+  #    class ApplicationController < ActionController::Base
+  #      private
+  #      
+  #      def serialization_scope
+  #        current_user
+  #      end
+  #    end
+  #
+  module Serialization
+    extend ActiveSupport::Concern
+
+    include ActionController::Renderers
+
+    included do
+      class_attribute :_serialization_scope
+    end
+
+    def serialization_scope
+      send(_serialization_scope)
+    end
+
+    def _render_option_json(json, options)
+      if json.respond_to?(:active_model_serializer) && (serializer = json.active_model_serializer)
+        json = serializer.new(json, serialization_scope)
+      end
+      super
+    end
+
+    module ClassMethods
+      def serialization_scope(scope)
+        self._serialization_scope = scope
+      end
+    end
+  end
+end