Rubyonrails Rails 5 API 控制器中未定义的实例方法respond_to

发布于03月14日

在用--api创建的rails 5中，我有一个错误

NoMethodError (undefined method `respond_to' for #<Api::MyController:0x005645c81f0798>
Did you mean?  respond_to?):

然而，在rails 4.2的文档中，它表示为http://edgeguides.rubyonrails.org/4_2_release_notes.html

respond_with and the corresponding class-level respond_to have been moved to the responders gem. Add gem 'responders', '~> 2.0' to your Gemfile to use it:

实例级响应不受影响:

我正在调用实例方法.怎么了

class ApplicationController < ActionController::API
end

# ...
class Api::MyController < ApplicationController

  def method1
    # ...
    respond_to do |format|
      format.xml { render(xml: "fdsfds") }
      format.json { render(json: "fdsfdsfd" ) }
    end

推荐答案

ActionController::API不包括ActionController::MimeResponds模块.如果你想使用respond_to，你需要包括MimeResponds.

class ApplicationController < ActionController::API
  include ActionController::MimeResponds
end


module Api
  class MyController < ApplicationController
    def method1
      # ...
      respond_to do |format|
        format.xml { render(xml: "fdsfds") }
        format.json { render(json: "fdsfdsfd" ) }
      end
    end
  end
end

资料来源:ActionController::API docs