Ruby on rails make Rabl如何使用ActionController:：Metal

我采取了类似的方法，但每次都收到空的回复。怎么了

基本控制器：

class Api::V1::BaseController < ActionController::Metal
  include AbstractController::Rendering
  include AbstractController::Callbacks
  include AbstractController::Helpers

  include ActionController::HttpAuthentication::Token::ControllerMethods
  include ActionController::Rendering
  include ActionController::Renderers::All
  include ActionController::MimeResponds
  include ActionController::Instrumentation

  append_view_path "#{Rails.root}/app/views"

  respond_to :json

end

class Api::V1::UsersController < Api::V1::BaseController

  def index
    @user = User.find(params[:id])
  end

end

尽量包括：

include ActionController::ImplicitRender

---

我一直在用rails 4.0.4和ruby 2.1.0对其进行测试，这是我在rails 4.1.8中的最低设置：

---

您可以随意添加模块

那么，您将哪些数据序列化为json？在哪里为RABL模板定义@settings变量？尝试改用controller@user中定义的。抱歉，示例中有一个输入错误。我在模板中使用@user

include ActionController::ImplicitRender

class Api::V1::BaseController < ActionController::Metal
  include AbstractController::Rendering # Basic rendering

  include ActionView::Rendering # Finds view using lookup_context and append_view_path

  include ActionController::Rendering       # Support respond_to and render formats
  include ActionController::MimeResponds    # MIME type for respond_to
  include ActionController::ImplicitRender  # Implicitly calls render so you don't
  include ActionController::Instrumentation # Sets Content-Type header amongst others

  append_view_path "#{Rails.root}/app/views" # Get views from here
end