class ActionController::Responder

def api_behavior(error)
  raise error unless resourceful?
  if get?
    display resource
  elsif has_errors?
    display resource.errors, :status => :unprocessable_entity
  elsif post?
    display resource, :status => :created, :location => api_location
  elsif has_empty_resource_definition?
    display empty_resource, :status => :ok
  else
    head :ok
  end
end