Rails 5 API 控制器中未定义的实例方法 "respond_to"

Question

在 rails 5 创建 --api 我有一个错误

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 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 不包含 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

来源：ActionController::API docs

Answer 2

从 Rails 4.2 开始，此功能不再随 Rails 一起提供，但可以轻松地包含在响应程序 gem 中（如上面评论中提到的 Max）。

将 gem 'responders' 添加到您的 Gemfile，然后

$ 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

Rails 5 API 控制器中未定义的实例方法 "respond_to"

Undefined instance method "respond_to" in Rails 5 API Controller

ruby

rest

ruby-on-rails

ruby-on-rails-5