ruby-on-rails - Rails 5 API Controller 中未定义的实例方法 "respond_to"

Question

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 的文档中它说 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:

Instance-level respond_to is unaffected:

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

Answer 1

ActionController::API 不包括 ActionController::MimeResponds 模块。如果您想使用 respond_to，您需要包含 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

来源:ActionController::API docs