1 files changed, 28 insertions, 0 deletions
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index 0a4b58de7f..4596aad46c 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -97,4 +97,32 @@ module AbstractController
       options
     end
   end
+
+  # Basic rendering implements the most minimal rendering layer.
+  # It only supports rendering :text and :nothing. Passing any other option will
+  # result in `UnsupportedOperationError` exception. For more functionality like
+  # different formats, layouts etc. you should use `ActionView` gem.
+  module BasicRendering
+    extend ActiveSupport::Concern
+
+    # Render text or nothing (empty string) to response_body
+    # :api: public
+    def render(*args, &block)
+      super(*args, &block)
+      opts = args.first
+      if opts.has_key?(:text) && opts[:text].present?
+        self.response_body = opts[:text]
+      elsif opts.has_key?(:nothing) && opts[:nothing]
+        self.response_body = " "
+      else
+        raise UnsupportedOperationError
+      end
+    end
+
+    class UnsupportedOperationError < StandardError
+      def initialize
+        super "Unsupported render operation. BasicRendering supports only :text and :nothing options. For more, you need to include ActionView."
+      end
+    end
+  end
 end