轨道3：什么是用JSON在铁轨REST-FUL行动响应的正确方法？ [英] Rails 3: What is the proper way to respond to REST-ful actions with JSON in rails?

问题描述

我试图让使用JSON响应的RESTful资源控制器我的Rails应用程序的API。这对我来说是全新的体验，所以我在寻找一些指导和指针。要开始做事了：

1. 在Rails应用程序，什么是适当的方式与JSON响应REST-FUL控制器的方法呢？ （创建，更新，销毁）


2. 是否有一个惯用的方式，通过一个JSON响应，以指示成功/失败？

---

其他信息：

• 我目前正在轨工作3.0.beta2


• 我想避免使用插件或宝石做繁重的工作，我的目标是更好地了解如何使一个轨道3 API。


• 链接到的地方，我能找到的主题的更多信息也将是AP preciated，谷歌上的一些快速搜索并没有做我多好。

解决方案

 ＃配置/ routes.rb中
MyApplicationsName :: Application.routes.draw做
  资源：文章
结束＃应用程序/控制器/ articles_controller.rb
类ArticlesController＆LT; ActionController的基地::  ＃使respond_with知道哪些格式
  ＃允许在每个单独行动
  respond_to代码：JSON  高清指数
    @articles = Article.all
    respond_with @articles
  结束  高清节目
    @article = Article.find（PARAMS [：ID]）
    respond_with @article
  结束  ...  DEF更新
    @article = Article.find（PARAMS [：ID]）
    @ article.update_attributes（PARAMS [：文章]）    ＃respond_with会自动检查@ article.valid？
    ＃和适当回应... @ a​​rticle.valid？将
    ＃设置根据是否@ article.update_attributes
    ＃得手过去所有的验证
    ＃@如果article.valid？那么respond_with会重定向到
    ＃到展示页面;如果!@article.valid~~V？然后respond_with
    ＃将显示：编辑视图，包括@ article.errors
    respond_with @article
  结束  ...结束
 

I'm trying to make an API for my rails application using JSON responses to RESTful resource controllers. This is a new experience for me, so I'm looking for some guidance and pointers. To start things off:

1. In a rails application, what is the "proper" way to respond with JSON to REST-ful controller methods? (create, update, destroy)
2. Is there an idiomatic way to indicate success/failure through a JSON response?

---

Additional information:

• I'm currently working with rails 3.0.beta2
• I would like to avoid using a plugin or gem to do the grunt work, my goal is to gain a better understanding of how to make a rails 3 API.
• Links to places I could find more information on the topic would also be appreciated, some quick searching on google didn't do me much good.

解决方案

#config/routes.rb
MyApplicationsName::Application.routes.draw do
  resources :articles
end

#app/controllers/articles_controller.rb
class ArticlesController < ActionController::Base

  # so that respond_with knows which formats are
  # allowed in each of the individual actions
  respond_to :json

  def index
    @articles = Article.all
    respond_with @articles
  end

  def show
    @article = Article.find(params[:id])
    respond_with @article
  end

  ...

  def update
    @article = Article.find(params[:id])
    @article.update_attributes(params[:article])

    # respond_with will automatically check @article.valid?
    # and respond appropriately ... @article.valid? will
    # be set based on whether @article.update_attributes
    # succeeded past all the validations
    # if @article.valid? then respond_with will redirect to
    # to the show page; if !@article.valid? then respond_with
    # will show the :edit view, including @article.errors
    respond_with @article
  end

  ...

end

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