为什么在 Rails 中创建销毁链接需要默认的 javascript 文件? [英] Why are default javascript files required to create a destroy link in rails?

问题描述

我今天想在 Rails 中创建一个基本的销毁"链接，所以我写了这个:

I wanted to create a basic "destroy" link in Rails today, so I wrote this:

 <%= link_to "destroy me", @company, :method=>:delete
 %>

生成的代码是:

<a href="/companies/1"
data-method="delete"
rel="nofollow">destroy me</a>

在我的路线中，通常的

resources :companies

我的销毁操作在我的控制器中.

And my destroy action was in my controller.

但是无论何时我点击链接，我都会被重定向到 show 操作.奇怪.

But anytime I would click on the link, I would be redirected to the show action. Weird.

结果我没有在我的布局中包含以下行:

It turned out I didn't include the following line in my layout:

<%= javascript_include_tag :defaults %>

包含它后，销毁链接起作用了！

After including it, the destroy link worked!

为什么?为什么我需要包含默认的 javascript 标签才能完成这项工作?

Why? Why would I need to include the default javascript tags to make this work?

既然我不想使用原型，我如何只包含我需要的文件?

And since I don't want to use prototype, how do I only include the files I need?

推荐答案

从 3.0 开始，Rails 表单助手生成带有 HTML5 数据属性(在您的示例中为 data-method)的干净 HTML 标记.为了支持这些数据属性，原型需要 rails.js.如果使用 jQuery，则需要 jQuery 版本 (https://github.com/rails/jquery-ujs).

Since 3.0, Rails form helpers generate clean HTML tags with HTML5 data attributes (data-method in your example). To support these data attributes, rails.js is required for prototype. If you use jQuery, then the jQuery version (https://github.com/rails/jquery-ujs) is needed.

简单地说，rails.js 与 javascript 框架(原型或 jquery)一起做了一些魔术来钩住标签上的点击和其他事件，否则当你点击一个链接时，正常的点击会发生，因为没有 javascript，链接是正常链接.

Simply put, rails.js together with the javascript framework (prototype or jquery) does some magic to hook click and other events on a tag, other wise when you click a link, a normal click happens because without javascript, the link is a normal link.

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