如何在Rails to_json输出中处理HTML实体？ [英] How to deal with HTML entities in Rails to_json output?

问题描述

我正在编写一个应用程序，它在后端使用Rails，在前端使用javascript / backbone。我正在尝试将一些rails模型引导到我的javascript 。具体来说，我想将 @courses 的内容加载到名为 window.courses 的js变量中。我在 html.erb 文件中有以下内容。

I'm writing an app that uses Rails on the backend and javascript/backbone on the frontend. I'm trying to bootstrap some rails models into my javascript. Specifically, I'd like to load the contents of @courses into a js variable called window.courses. I've got the following in an html.erb file.

<%= javascript_tag do %>
    window.courses = JSON.parse('<%= @courses.to_json %>');
<% end %>

我期待 erb 预处理器将此渲染为有效的javascript，如此

I'm expecting the erb preprocessor to render this into valid javascript, like so

<script type="text/javascript">
//<![CDATA[
    window.courses = JSON.parse('[{"code":"myCourseCode", ...
//]]>
</script>

...相反，我得到的代码包括 HTML实体。

... but, instead, I'm getting code that includes HTML entities.

<script type="text/javascript">
//<![CDATA[
    window.courses = JSON.parse('[{&quot;code&quot;:&quot;myCourseCode&quot;, ...
//]]>
</script>

显然，当我尝试解析时，我收到了javascript错误。

Obviously, I get javascript errors when I try to parse this.

有谁知道我是怎么回事可以处理这些HTML实体以生成有效的javascript吗？我意识到一个选项是 unescape客户端的实体，但这似乎是一个迂回的解决方案。有没有办法可以让Rails生成不需要你的JSON nescaping？

Does anyone know how I can deal with these HTML entities in order to produce valid javascript? I realize that one option would be to unescape the entities on the client side, but this seems like a roundabout solution. Is there a way that I can get Rails to produce JSON that doesn't need unescaping?

推荐答案

如果你打算使用raw（obj.to_json），你必须确保设置了以下内容。

If you intend to use raw(obj.to_json) you MUST ensure the following is set.

ActiveSupport.escape_html_entities_in_json = true 

这篇关于如何在Rails to_json输出中处理HTML实体？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！