未定义的实例方法“respond_to"在 Rails 5 API 控制器中 [英] Undefined instance method "respond_to" in Rails 5 API Controller

问题描述

在用 --api 创建的 rails 5 中，我有一个错误

In rails 5 created with --api I have an error

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

但是，在 rails 4.2 的文档中，它说 http://edgeguides.rubyonrails.org/4_2_release_notes.html

However, in the documentation for rails 4.2 it says http://edgeguides.rubyonrails.org/4_2_release_notes.html

respond_with 和对应的类级 respond_to 已经搬到了响应者宝石.将 gem 'responders', '~> 2.0' 添加到您的Gemfile 使用它:

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 respond_to 不受影响:

Instance-level respond_to is unaffected:

我正在调用实例方法.怎么了?

And I'm calling the instance method. What's the matter?

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.如果您想使用 respond_to，您需要包含 MimeResponds.

ActionController::API does not include the ActionController::MimeResponds module. If you want to use respond_to you need to include MimeResponds.

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


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

来源:ActionController::API 文档

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