如何使用rails format.json [英] how to use rails format.json

问题描述

def index
@cellphones = Cellphone.all

respond_to do |format|
  format.html # index.html.erb
  format.json { render json: @cellphones }
end

• 请简单回答...

  • SIMPLE ANSWERS PLEASE...

    • format.json 的用途是什么?

    我必须为其创建视图吗?

    do I have to create a view for it?

    它与 javascrip 有什么关系?

    它与 ajax 有什么关系?

    请举一个简单的示例来说明如何使用它...

    please give a simple example of how to use it...

    推荐答案

    1. 用于返回JSON.
    2. 否，它将@cellphones呈现为JSON.您可以 创建视图，例如，使用JSON构建器自定义输出，而不是Rails提供的现成功能.
    3. JavaScript通常用于发出JSON Ajax请求，例如客户端框架.
    4. Ajax调用通常需要JSON作为结果.他们还可能要求HTML直接呈现.
    5. 是一个如何使用它的示例；向/cellphones发出Ajax请求.
    1. It's used to return JSON.
    2. No, it renders @cellphones as JSON. You may create a view, though, for example, using a JSON builder to customize the output beyond what Rails provides out of the box.
    3. JavaScript is often used to make JSON Ajax requests, like for client-side frameworks.
    4. Ajax calls often want JSON as a result. They may also request HTML to render directly.
    5. That is an example of how to use it; make an Ajax request to /cellphones.

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