Rails 5 API Controller中未定义的实例方法"respond_to"

Question

在--api我创建的rails 5中有一个错误

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

respond_with和相应的类级别respond_to已被移动到响应者gem.将gem'responseders','〜> 2.0'添加到您的Gemfile中以使用它:

实例级的respond_to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

Answer 1

ActionController::API不包括该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


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

Answer 2

从Rails 4.2开始,此功能不再随Rails一起提供,但可以很容易地包含在响应者gem中(如Max在上面的评论中所述).

gem 'responders'然后添加到您的Gemfile

$ bundle install
$ rails g responders:install

来源:
http ://edgeguides.rubyonrails.org/4_2_release_notes.html#respond-with-class-level-respond-to https://github.com/plataformatec/responders