foos2.rb

module FoosController
  class Index < ControllerAction
    def get
      @foos = Foo.all
      succeed_with(FooPresenter.new(@foos).to(format)) # if you want more control over presentation, hand off to the presenter
    end
  end # Index
  
  class Create < ControllerAction
    def post
      @foo = Foo.new(params)
      @foo.save ? succeed_with(@foo.to_json) : fail_with(@foo.errors.to_json, 422) # ControllerAction provides #fail_with and #succeed_with
    end
    
    private
    
    def params
      # still mungeing params but now we only worry about stuff sent for the "create" action
      super.except(:deleted_at) # ControllerAction gives us all the params. Here we do not allow :deleted_at, for example
      #
    end
  end # Create
  
end #FoosController